SSD Review : Samsung 850 PRO 2TB SSD Vs Samsung 850 EVO 2TB SSD

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1. SSD Review: 850 EVO Versus 850 PRO

For the past decade we’ve been hearing people say that it was only a matter of time before Solid-State Drives (SSD’s) will nearly completely kill off magnetic drives. Traditional hard drives will still exist in niche markets they said, but SSDs will eventually reign supreme with regards to performance, cost, form factor size and capacity. Any PC enthusiast that has built a system in recent years knows that SSDs have already won the performance and form factor battle, but they are still lacking in storage capacity and cost.  The $/GB argument is very subjective, but it appears that many are wanting to purchase flagship SSDs well below the $0.50 mark when it comes to cost per GB.

samsung 850 pro evo 2tb

Samsung has raised the bar with regards to storage capacity in its SSDs today by releasing massive new 2TB models in the 850 PRO and 850 EVO product lines. These are Samsung’s highest-capacity SSDs to date for the consumer market and they are being released now because Samsung feels the market and pricing will finally support large 2TB SSDs. Samsung’s previous highest-capacity SSD could hold just 1TB of data, so Samsung has doubled the storage capacity of their consumer SSD product line! Both of the 2TB drives are also priced below $0.50 per GB!

Samsung 850 SSD

These drives are just a capacity increase for the existing Samsung 850 PRO and 850 EVO series, so there isn’t too much new to talk about under the hood as the amount of NAND is the only thing of significance to change. We already did reviews on the Samsung 850 Pro 1TB and Samsung 850 EVO 120GB and 500GB drives when those series first were launched, so we’ll let you go back and read those if you’d like all the background information on each series.

850 PRO 2TB 850 EVO 2TB
Model Number MZ7KM2T0 MZ75E2T0
Samsung Controller MHX MHX
Samsung 3D V-NAND 2bit MLC 3bit TLC
Cache 2GB 2GB
Seq. Read 550 MB/s 540 MB/s
Seq. Write 520 MB/s 520 MB/s
4K Random Read QD1 10,000 IOPS 10,000 IOPS
4K Random Write QD1 36,000 IOPS 40,000 IOPS
4K Random Read QD32 100,000 IOPS 98,000 IOPS
4K Random Write QD32 90,000 IOPS 90,000 IOPS
Idle Power 60mW 60mW
Max Read/Write Power 3.3W / 3.4W 3.7W / 4.7W
MTBF 2 Million Hours 1.5 Million Hours
TB Written (TBW) 300 TBW 150 TBW
GB/day 80GB 80GB
Warranty 10 years 5 Years

Both drives use Samsung’s newest MHX controller along with the latest 3D V-NAND technology, in which storage chips are placed on top of each other. By utilizing 3D V-NAND you can get up to 50% power savings over 2D planar NAND and do so in a smaller package! The Samsung’s 3D V-NAND is stacked 32 cell layers vertically over one another and the storage chips are connected through a thin, high-speed connector called TSV (Thru Silicon Via). The big difference between these drives is that Samsung is using 2bit MLC on the 850 PRO and 3bit TLC on the 850EVO. As their names imply, 2-bit MLC NAND stores 2 bits of data per cell and 3-bit TLC NAND stores 3 bits of data per cell. 3-bit TLC NAND-based products have started to dominate the SSD industry since they chips are less costly to produce, but the generally have lower performance and endurance ratings. This is one of the reasons for the cost and warranty difference between the 850 Pro and 850 EVO as the 850 Pro is using what many would argue is better NAND. Many will say that 2-bit MLC NAND far exceeds the needs for consumer SSDs, but we’ve had our fair share of SSDs die here over the years and we are big fans of endurance and reliability after having numerous failures.

Samsung 850 2TB SSDs

When it comes to performance the 850 EVO 2TB SSD’s sequential read speed is 540 MB/s and write speed is 520 MB/s, according to Samsung’s measurements. The random read speed of the drive is 98,000 IOPS and the write speed is 90,000 IOPS. The Samsung SSD 850 PRO is able to slightly best those numbers with 550 MB/s read and 420MB/s write sequential side of things and 100,000 IOPS read and 90,000 IOPS write with regards to 4K Random performance at a Que Depth of 32. The performance numbers are super close on the 850 Pro and 850 EVO, so the key differentiation factors between these two drives would be the endurance and the pricing. Both drives even offer AES 256-bit Full Disk Encryption (FDE), TCG/Opal V2.1 and eDrive security support

Sansung SSD 850 EVO Price $/GB Samsung SSD 850 Pro Price $/GB
Samsung 850 EVO 120GB $56.37 $0.47 per GB Samsung 850 PRO 128GB  $97.99 $0.77 per GB
Samsung 850 EVO 250GB $97.99 $0.39 per GB Samsung 850 PRO 256GB  $142.99 $0.56 per GB
Samsung 850 EVO 500GB $161.99 $0.32 per GB Samsung 850 PRO 512GB  $254.97 $0.48 per GB
Samsung 850 EVO 1TB $374.29 $0.36 per GB Samsung 850 PRO 1TB  $487.01 $0.48 per GB
Samsung 850 EVO 2TB $799.99 $0.39 per GB Samsung 850 PRO 2TB $999.99 $0.48 per GB

When it comes to pricing the Samsung 850 series is the number one selling line of SSDs right now and one of the reasons is that the pricing on the Samsung 850 EVO is pretty spectacular. You are looking at just $0.32 per GB on the 500GB model and that the 480-512GB capacity range is very popular with gamers and enthusiasts right now as you can hold a decent number ammount of information on a boot drive of that size. The Samsung SSD 850 EVO 2TB drive that has a suggested retail price of $799.99 ($0.39 per GB) and the Samsung SSD 850 Pro 2TB drive is slightly higher at $999.99 ($0.48 per GB). Samsung is charging 25% more for the Samsung 850 Pro and that higher price is based primarily on the endurance  difference.

Let’s go ahead and slap this pair of 2TB drives on our test bench and see how they perform!

2. Inside The Samsung SSD 850 EVO & 850 PRO

Opening up the Samsung SSD 850 PRO and SSD 850 EVO require a hard to find pentalobe screwdriver and you’ll need to cut or remove the label in order to access two of the three screws that hold the cover down. Removing the cover defaces the label and voids your warranty, so we happily used a knife to cut some holes in the labels and took out the tiny screws for you to take a look inside.

Samsung SSD 850 Inside

Inside both the 850 EVO and 850 PRO appear to be using the same exact PCB design with four Samsung 3D V-NAND packages located on each side of the green PCB.

Samsung 2TB SSD

Which drive was the 850 PRO? Flipping the two drives over we see the identical Samsung MHX controllers, 2GB of LPDDR2 memory for caching purposes and the other four Samsung 3D V-NAND packages. Samsung designed the 850 PRO and 850 EVO to have 1MB of cache per GB of storage capacity.

samsung mhx controller

Here is a closer look at the Samsung MHX controller that is used on both drives. The markings on the both packages read S4LP052X01-8030. Samsung had to use the new MHX controller as the previous MEX controller could only support of to 1TB of NAND Flash. Samsung went back to the drawing board and came up with the MHX controller that obviously supports 2TB of NAND Flash and does so while achieving the same performance as the existing 1TB models.


The Samsung SSD 850 EVO uses Samsung 3D V-NAND flash memory with a product number showing K9DMGB8S7C.


The Samsung SSD 850 PRO uses Samsung 3D V-NAND flash memory with a product number showing K9UMGB8S7A.

Now that we know what is inside we can move along and start benchmarking these two drives!

3. The SSD Benchmark Test System

Before we look at the numbers, let’s take a brief look at the test system that was used. All testing was done on a fresh install of Windows 8.1 Pro 64-bit and benchmarks were completed on the desktop with no other software programs running. This means windows defender, windows update, disk fragmentation and everything else that would interfere with testing was disabled. Windows 8.1 also had the power option set to high performance. We also disabled Turbo mode on the Intel Core i7-5960X to ensure our numbers are spot on and repeatable.

ASUS X99 Sabertooth Motherboard

The Intel X99 platform that we used to test the M.2 PCIe SSD was based around the ASUSX99 Sabertooth motherboard with BIOS 1702 that came out on 04/15/2015. We used Intel RST storage drivers, the exact version was The Crucial Ballistix DDR4 32GB 2400MHz memory kit was run at 2666MHz with 15-15-15-28 1T memory timings. The Corsair Neutron XT 240GB SSD was used as the primary drive.

Intel X99 Test Bench

Intel LGA 2011v3 Test Platform
Component Brand/Model Live Pricing


Core i7 5960X
Click Here


ASUS X99 Sabertooth
Click Here


Crucial Ballistix 2400MHz 32GB
Click Here

OS Drive

Corsair Neutron XT 240GB
Click Here

Power Supply

Corsair AX860i
Click Here

Operating System

Windows 8.1 Pro 64-Bit
Click Here

CrystalDiskInfo 6.3.2 Readout:

The readout on CrystalDiskInfo 6.3.2 shows both the Samsung 850 Pro and 850 EVO 2TB SSDs support S.M.A.R.T., NCQ, TRIM and DevSleep. The drives we received were pre-production loaner samples that have firmware version EXM02B6Q for the 850 PRO 2TB and EMT01B6Q on the 850 EVO 2TB. Samsung said that the might change or update the firmware before product ships to retail market sometime in July. The Samsung Magician software supporting the 850 EVO/PRO 2TB drives is not available at this time, but it is expected to be released in the middle of August if all goes as planned.

Samsung 850 Pro 2TB SSD

Samsung 850 Evo 2TB SSD

The overall capacity shows up as 1.86TB on the Samsung SSD 850 Pro and 1.81TB on the Samsung SSD 850 EVO in Windows. The reason the capacity is different on these two drives is that the 850 EVO uses 3D V-NAND 2-bit MLC memory and the 850 Pro uses 3D V-NAND 3-bit TLC memory.

Samsung SSD 850 2TB Capacities

Let’s have a look at the performance!

4. ATTO & CrystalDiskMark

ATTO v2.47

ATTO is one of the oldest drive benchmarks still being used today and is still very relevant in the SSD world. ATTO measures transfers across a specific volume length. It measures raw transfer rates for both reads and writes and places the data into graphs that can be very easily interpreted. The test was run with the default runs of 0.5KB through 8192KB transfer sizes with the total length being 256MB.

ATTO – Samsung SSD 850 PRO 2TB:

ATTO - Samsung SSD 850 PRO 2TB

ATTO – Samsung SSD 850 EVO 2TB:

ATTO - Samsung SSD 850 EVO 2TB

Benchmark Results: ATTO showed both the Samsung SSD 850 PRO and 850 EVO 2TB drives maxing out at 556 MB/s read and 533MB/s write in the standard overlapped I/O benchmark. If you look at some of the smaller file sizes you’ll see the Samsung SSD 850 PRO is performing at a slightly higher performance level until the drives start to plato at their peak sequential read/write speeds. 

CrystalDiskMark 3.0.4 x64

CrystalDiskMark is a small benchmark utility for drives and enables rapid measurement of sequential and random read/write speeds. Note that CDM only supports Native Command Queuing (NCQ) with a queue depth of 32 (as noted) for the last listed benchmark score. This can skew some results in favor of controllers that also do not support NCQ.

CystalDiskmark – Samsung SSD 850 PRO 2TB:

CystalDiskmark - Samsung SSD 850 PRO 2TB

CystalDiskmark – Samsung SSD 850 EVO 2TB:

CystalDiskmark - Samsung SSD 850 EVO 2TB

Benchmark Results: The Samsung SSD 850 PRO 2TB drive topped out at 546 MB/s read and 523 MB/s write on the sequential test whereas the the Samsung SSD 850 EVO 2TB drive reached 542MB/s read and 521 MB/s write. The real performance difference that is worth talking about is not in the sequential performance numbers though as it would be the Random 4K performance. The Samsung SSD 850 Pro peaked at 145 MB/s write on that test versus just 121 MB/s on the 850 EVO drive. The 4K Random Read scores were right around 43 MB/s on each drive. 

Let’s look at some other benchmarks!

5. AS SSD Benchmark

AS-SSD (1.7.4739.38088) Benchmark:

We have been running the AS-SSD Benchmark app for over some time now and found that it gives a broad result set. The programmer has worked very hard on this software and continues to make updates often so if you use it, show him some love and send him a donation. There are now three tests that are found within the tool and we’ll show the results from all three of them.

ASSSD Samsung 850 EVO and PRO

Benchmark Results: AS SSD showed the Samsung 850 SSD PRO 2TB drive having an overall score of 1210 points versus 1193 on the Samsung SSD EVO 2TB drive. Both the sequential and random write tests performed better on the Samsung SSD 850 Pro 2TB drive, which is what gave that drive the higher overall score. 

asssd copy samsung 850

Benchmark Results: The copy benchmark test results were pretty solid with around 490 MB/s for the ISO test and then around 435 MB/s for the Program and Game tests. The Samsung SSD 850 PRO 2TB drive performed faster on all three trace tests and was significantly faster in the Program test case. 

AS SSD Compression Benchmark – Samsung SSD 850 PRO 2TB:

asssd 850 PRO compression

AS SSD Compression Benchmark – Samsung SSD 850 EVO 2TB:

asssd 850evo compression

Benchmark Results: For this benchmark chart you would ideally want to see a straight line as you don’t want any compression performance loss as the test goes from 0% compressible to 100% compressible data during the benchmark test period. Performance on both drives was identical as they topped out at 526MB/s read and 503MB/s write, but you can see the Samsung SSD 850 PRO 2TB had a much straighter line and was able to sustain a higher performance rate than the 850 EVO 2TB.

6. Anvil Storage Utilities

Anvil Storage Utilities 1.1.0

Along with the move to a new platform, we decided to make a change in one of the benchmarks. There’s a relatively new benchmark called Anvil Storage Utilities that is in beta but close to production. It’s a very powerful tool that measures performance through a variety of tests which can be customized. Since some of the tests more or less duplicate what we get from other benchmarks we use already, we decided to use the IOPS (Input/Output Operations Per Second) testing on 4kb file sizes at a queue depth of 4, 16, and 32. IOPS performance is something SSD makers tout quite a bit but we generally don’t do a lot of IOPS testing because frankly a lot of users can’t relate to IOPS metrics as well and it tends to be more meaningful to the enterprise/server crowd. Still, it is another performance indicator with relevance and while some drives post good MB/s numbers, their IOPS scores aren’t always commensurate which this test will prove out.

Anvil SSD Benchmark with 100% Compression (incompressible data):

Samsung SSD 850 PRO 2TB:

Anvil Samsung SSD 850 Pro 2TB

Samsung SSD 850 EVO 2TB:

Anvil Samsung SSD 850 EVO 2TB

Benchmark Results: The Anvil SSD Benchmark showed that with 100% compression (incompressible data) the Samsung SSD 850 PRO 2TB drive was able to perform better than the Samsung 850 EVO 2TB drive in every single benchmark test.

Anvil SSD Applications Benchmark at 46% Compression:

Samsung SSD 850 PRO 2TB:

Anvil Samsung SSD 850 Pro 2TB

Samsung SSD 850 EVO 2TB:

Anvil Samsung SSD 850 EVO 2TB

Benchmark Results: The same proved true when we ran the applications benchmark with the compression at 46% to help mimic real world applications better. 

7. PCMark 8 Storage Test

PCMark 8 is the latest version in Futuremark’s series of industry standard PC benchmarking tools. With PCMark 8 you can test the performance of all types of PC, from tablets to desktops. With five separate benchmark tests plus battery life testing, PCMark 8 helps you find the devices that offer the perfect combination of efficiency and performance. PCMark 8 is the complete PC benchmark for home and business. We ran the storage benchmark test suite on the HyperX Savage 240GB SATA III SSD.

Samsung SSD 850 PRO 2TB:

PCMark 8 Storage Test Samsung 850 PRO 2TB

Samsung SSD 850 EVO 2TB:

PCMark 8 Storage Test Samsung 850 EVO 2TB

Benchmark Results: When it comes to PCMark 8 performance you are looking at an overall score of 4990 on the 850 PRO 2TB and 4992 on the 850 EVO 2TB, with just very small differences on the benchmark that aren’t enough to deter purchasing either drive. The storage bandwidth on the Samsung 850 SSD PRO 2TB was 284.27 MB/s versus 286.73 MB/s on the Samsung 850 SSD EVO 2TB. It took nearly five hours to run those benchmarks just to show no significant measurable performance differences on one of the most widely used storage benchmarks that the industry relies on!

8. IOMeter Sequential Performance

Starting here in April 2015 Legit Reviews  has brought ack synthetic IOMeter v1.1.0 testing to our high-end Solid-State Drive reviews as we feel that the canned benchmarks no longer show enough of the performance picture nor do they expose many of the heat issues that we are starting to encounter on M.2 PCIe SSDs. We start out testing each drive with IOMeter, but first we prepare the drive. This is done by using Parted Magic to complete a full Secure Erase each and every drive. Next we use IOMeter to prefill the drive by performing the industry standard 128KB, aligned, sequential write workload across the entire drive for a period of 20 minutes. Once the drive is conditioned we run our saved sequential test profile that runs our 128KB test for two minutes without any idle time in between the tests. The queue depth is set to 32 as we feel with NVMe drives starting to come out that we need to increase our IO depth.


The 128KB Sequential Read/Write test is done primarily to make sure the drives we are testing meet or surpass the manufacturer specifications for sequential Read/Write performance. The Samsung 850 EVO and 850 PRO 2TB drives are both rated at up to 520 MB/s sequential write, but the 850 PRO has a 550 MB/s sequential read rating while the 850 EVO has a 540 MB/s sequential read speed. We were able to top our drive out at 558-559 MB/s read and 533 MB/s write, which is actually faster than their rated speeds.


For those that like to know the IOPS results you are looking at around 4,300 IOPS for the sequential read and 4,100 IOPS on the sequential write.


Having high IOPs per second is generally considered good, but you also look at the latency when interpreting the results. Just because the IOPs are high it might not mean that the data is being delivered at a reasonable latency and this could cause for a poor user experience. The Samsung 850 EVO and 850 PRO 2TB drives were found to have just under 8ms on the average response times, which is okay for a SATA drive.

9. IOMeter 4KB Random Performance

Our 4KB random performance test is conducted in the same manner as our sequential tests, but once the drive is conditioned we run our saved random test profile that runs our 4KB test for two minutes without any idle time in between the tests. The queue depth is set to 32 on four workers and the test is begun. To get the benefits from NVMe based drives you must use multiple CPU queues and this is why we are now using four workers for this IOMeter test.


IOPS is the main thing we are looking at in this test scenario and the 850 PRO 2TB drive is rated at 100k IOPS for the 4K Random Read while the 850 EVO 2TB drive has a slightly lower rating of 98k IOPS.  Both drives are rated at 90,000 IOPS for the 4KB Random Writes. On our conditioned drives we hit ~98,000 IOPS Read and ~87,000 IOPS Write. Both drives are performing nearly the same!



When it comes to MBps you are looking at ~400 MB/s on the 4KB Random Reads and ~356 MB/s on the 4KB Random writes.


The response times on the Samsung SSD 850 EVO and 850 PRO 2TB SATA III SSDs were below 1.5ms for both read and write operations, which is great for a SATA drive.

10. IOMeter Mixed Performance

Our mixed performance test is conducted in the same manner as our sequential tests, but once the drive is conditioned we run our test profile to look at performance in various read/write states. We start the test with 100% reads and then add write data into the mix in 10% increments until we end up with no reads at all in the workload.


We didn’t see much of a difference between the two drives with regards to 100% read and write operations on both the 128KB sequential and 4K random tests, but we did find a difference between the two when we mixed up the workloads. We thought the results were wrong the first time, so we used Parted Magic to secure erase the drive and spent another 80 minutes pre-filling each 2TB drive in order to run the test again. After several more hours of testing we found damn near the same results. We plotted both test runs in the chart above for each drive. The Samsung SSD 850 PRO 2TB has a very slight performance drop when you begin to mix the read/write workload, but the line is nearly straight and that is impressive. The Samsung SSD 850 EVO has identical performance up until you get to 70% reads and 30% writes and then performance begins to drop off before recovering back on the 100% write test.


When looking at 4KB Random mixed workload performance we found both drives have performance that tapers off as the number of writes increases, but we don’t see the normal ‘bath tub’ curve on either drive. The Samsung SSD 850 EVO performance dropped off again after the 70/30 read/write test, but recovered quicker this time for some reason.

Let’s take a look at power and wrap this up!

11. Samsung SSD 850 2TB SSD Power Consumption

Samsung 850 2TB SSDs

Having low power consumption is important to many enthusiasts and we were shocked to learn that the Samsung SSD 850 EVO 2TB uses 38% more power during write operations than the Samsung SSD 850 PRO 2TB drive. Here are the power consumption numbers given by Samsung for both the 850 PRO and 850 EVO 2TB drives.

  • Samsung SSD 850 PRO 2TB: 5mW Device Sleep / 60mW Idle / 3.3W (MAX) Average Active Read / 3.4W (MAX) Average Active Write
  • Samsung SSD 850 EVO 2TB: 5mW Device Sleep / 60mW Idle / 3.7W (MAX) Average Active Read / 4.7W (MAX) Average Active Write

We figured we’d give it a quick look to see what is going on with the two drives on our own power testing gear. We measured the power at idle and load power states using both sequential and random read/write test data.

Samsung SSD 850 Power Consumption

When it comes to an idle power state we found the 0.04-0.06 Watts of power on our Intel X99 desktop platform, which is some of the best idle power numbers we have ever seen. When it comes to peak power we found the SSD 850 PRO 2TB drive hit 3.24 Watts during sequential write operations and just 3.10W during sequential read operations. The Samsung SSD 850 EVO 2TB drive hit 3.85 Watts during sequential write operations and 3.23W during sequential read operations. On the write tests we found a ~19% power difference between the two dries on sequential operations and a ~44% different on random writes. The Samsung 850 EVO used more power during both sequential and random reads as well, but not by nearly so much.

12. Samsung SSD 850 2TB Temperatures

Samsung 850 Pro & 850 EVO 2TB SSDs

The Samsung SSD 850 PRO and 850 EVO 2TB drives use different amounts of power during write operations, so we were interested in see how the temperatures on the drives would be after a we performed a continual write to the drive for 20 minutes. This means that we wrote about 650 GB of data to the drive, which is more that most people would ever do in a normal consumer setting at one time unless they were backing up something. It should be noted that our test system is on an open air test bench and the SSDs had fans blowing across them to circulate air around them. This really is what we’d consider a worst case scenario as most people don’t do solid writes for 20 minutes on a drive that has no airflow.

Samsung SSD 850 PRO Temperatures

The Samsung SSD 850 PRO 2TB drive had an idle temperature of 27C and topped out at 50C.

Samsung SSD 850 EVO Temps

The Samsung SSD 850 EVO has the same exact idle temperature of 27C, but the maximum load temperature was much higher at 62C. The Samsung SSD 850 EVO 2TB drive uses more power for read and write operations and it shouldn’t come as a big surprise to anyone that the 850 EVO drive also runs at a higher load temperatures.

13. Final Thoughts & Conclusions

Samsung 850 SSD

The Samsung SSD 850 PRO and 850 EVO 2TB SSDs  were found to be two very solid performing SSDs. The drives use the same Samsung MHX controller with 2GB of cache, so the major difference between the drives is that the 850 PRO uses 2bit MLC NAND and the 850 EVO uses 3bit TLC NAND. The SSD 850 PRO uses the more expensive 2bit MLC NAND that is known to have higher endurance, so that is why there is a $200 price and warranty difference between the two models. The higher Total Bytes Written and 10-year warranty might be enough for some to justify purchasing the 850 PRO over the 850 EVO, although a 5-year warranty is still plenty long for a SATA SSD as will you still be using this drive in 2020? Oddly enough Samsung says that both drives are built to handle 80GB of writes per day, but the 5-year warranty on the 850 EVO allows for 150 TBW (Tera Bytes Written) and the 10-year warranty allows for 300 TBW. This means the drives are rated for the same writes per day, but the SSD 850 PRO should last twice as long due to the higher endurance NAND being used.

Our testing showed no real significant performance differences between the drives until we got into the mixed workload testing and the Samsung SSD 850 PRO proved to have better performance. The performance gap was the largest once you got in the 40-70% write range. On top of the mixed workload performance differences we also found the Samsung SSD 850 PRO uses significantly less power and ran cooler than the SSD 850 EVO. We aren’t bashing the Samsung SSD 850 EVO 2TB drive by any means as it performed exceptionally in our testing, but simply pointing out the key differences we noted after spending a week with the drives on the test bench.

Samsung currently has 44.7% of the SSD market share and releasing the first 2TB SSD in the 2.5-inch form factor will certainly help. Samsung has been able to double the amount of data that we can store in the same amount of space and that is huge for people that are looking for the largest consumer SATA III SSD that can be purchased. If you need a large 2TB SSD for all your games or want make a NAS with 2TB SSDs, the time for waiting is over! We did ask Samsung if these 2TB drives were ready for NAS deployment or if the firmware needed to be ‘tuned’ for proper use in a NAS environment. Samsung responded to our question with this statement.

Samsung does not “tune” our drives for specific applications.  Compared to traditional HDD, Samsung SSD’s provide superior performance, reliability and energy efficiency and are suitable for many NAS applications.  That being said, many NAS manufacturers perform compatibility testing to ensure our drives work properly in their enclosures.  Check with individual manufacturers Approved Vendor Lists (AVL) to see if Samsung SSD drives have been tested with an individual enclosure.” – Samsung PR

Samsung SSD 850 Series Pricing on July 6th, 2015:

Sansung SSD 850 EVO Price $/GB Samsung SSD 850 Pro Price $/GB
Samsung 850 EVO 120GB $56.37 $0.47 per GB Samsung 850 PRO 128GB  $97.99 $0.77 per GB
Samsung 850 EVO 250GB $97.99 $0.41 per GB Samsung 850 PRO 256GB  $142.99 $0.56 per GB
Samsung 850 EVO 500GB $161.99 $0.32 per GB Samsung 850 PRO 512GB  $254.97 $0.48 per GB
Samsung 850 EVO 1TB $374.29 $0.36 per GB Samsung 850 PRO 1TB  $487.01 $0.48 per GB
Samsung 850 EVO 2TB $799.99 $0.39 per GB Samsung 850 PRO 2TB $999.99 $0.48 per GB

When it comes to pricing the Samsung SSD 850 EVO runs $799.99 ($0.39 per GB) and the Samsung SSD 850 PRO runs $999.99 ($0.48 per GB).  These prices are the suggested retail price, so we expect to see street pricing a little lower in the weeks ahead. No other company offers 2TB 2.5-inch SSDs just yet, so Samsung is the first company to offer this much capacity in a traditional 2.5-inch drive form factor with a 7mm Z-height!

Which drive is the right one to buy? The Samsung SSD 850 PRO had better mixed workload performance, uses less power, runs cooler and has a longer warranty. If the price is something you can afford and the notable areas of difference are important to you then that is the easy choice. If you don’t see yourself using this drive in five years, have a desktop PC with good cooling and don’t care about temps or power the Samsung SSD 850 EVO is a wicked fast drive that only has a performance blemish in the mixed workload scenarios. Either drive should perform great for you and will leave you happy!




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