AMD Ryzen 7 1800X Review

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KEY FEATURES

  • 8 cores/16 threads
  • 16MB L3 cache
  • 3.6GHz base clock / 4GHz boost clock
  • Simultaneous multi-threading
  • Zen architecture
  • Multiplier unlocked
  • Manufacturer: AMD
  • Review Price: £499.00/$748.50

AMD RYZEN 7 REVIEW-IN-PROGRESS

WHAT IS THE AMD RYZEN 7 1800X?

The AMD Ryzen 7 1800X is the top-of-the-line processor from AMD’s new Ryzen range of CPUs that’s launching today. Boasting eight cores, it’s a monster chip that’s designed to power through the heaviest of workloads – and take on the likes of the Intel Core i7-6900K.

AMD releasing a CPU isn’t new, but this time round the company has delivered on its promises by way of a leap in performance and power efficiency. As a result, the AMD Ryzen 1800X and the rest of the AMD Ryzen lineup bring true competition to the CPU market for the first time in a decade.

Not that the 1800X comes cheap. It will set you back £500, while the cheapest Ryzen 7 processor launching today costs £330. However, it undercuts the competition from Intel by a significant margin, and suggests bargains await when the rest of the AMD Ryzen range launches later in the year.

Note: I’ve only had the AMD Ryzen for a very short time, so still have further testing and overclocking to carry out, and as such this review is more of a work in progress. As I gather more data, I’ll get closer to offering a final score. Check back soon if you’d like a more in-depth look at its performance and overclocking abilities.

AMD Ryzen 7 1800X

AMD RYZEN 7 1800X – RYZEN AND ZEN

To recap, Ryzen is the new brand name for AMD’s fresh line of CPUs. It’s akin to Intel’s Core branding and either replaces or sits alongside AMD’s older Athlon and FX models. Since these are CPUs only, with no built-in GPU, they sit apart from the company’s A-series APUs.

Like the older brands Ryzen will cover a wide range of CPUs, running from the top-of-the-line Ryzen 7 chips that have just launched, down through Ryzen 5 and Ryzen 3, which will be arriving later in the year. If you’re just into gaming and won’t be embarking on big video editing projects, it’s probably worth waiting for those to launch instead.

All the Ryzen chips will be based on the company’s completely new CPU micro-architecture – the underlying design that makes up the chips – known as Zen. This is a significant change from previous AMD designs and it brings with it huge leaps in power efficiency and raw performance.

The biggest development is that the number of instructions per clock – the calculations for each tick of the CPU’s internal many-GHz clock – that Zen is capable of has leapt 40% over previous AMD designs.

AMD Ryzen 7 1800X

Zen also brings support for simultaneous multi-threading for the first time. This is where each core of the chip can deal with two threads at once, making it appear to your software that it’s a dual-core, or in the case of these Ryzen 7 chips, 16-core chip. It’s analogous to Intel’s Hyper-Threading technology.

Along with these improvements, Zen is also far more power efficient than before, thanks in part to more granular control of the processor’s speed and voltage; it’s able to ramp up and down far faster than before. The technology for managing this is called SenseMI.

Also crucial is the move to a new 14 nanometre (nm) FinFET manufacturing process. This brings AMD in line with Intel’s current lineup of CPUs – the Kaby Lake range – that also use a different but equally small 14nm technology.

The general rule is that the smaller the manufacturing technique, the greater power efficiency and the lower the price of manufacture; generally, this is in area where Intel has led over AMD.

This time round, however, Intel hasn’t been able to keep up its usual pace of development, allowing AMD to catch up.

What’s more, this doesn’t look set to change any time soon. Kaby Lake only just launched, and Intel’s smaller 10nm technology isn’t expected to arrive until well into 2018, with the Cannonlake range of processors.

Other features to arrive with Zen and Ryzen include support for DDR4 and a new auto-overclocking feature called XFR (eXtended Frequency Range). Like Intel, AMD’s chips have a base clock frequency and a boost clock frequency that allow the chip to ramp up and down in response to the workload. XFR is the last bit of auto-overclocking that can be applied to a single core, if the processor isn’t too hot. It can apply up to 100MHz on top of the boost clock speed on X chips and up to 50MHz for non-X chips. This should mean the processor is always working to very near its maximum capability.

THE RYZEN 7 RANGE

There are just three Ryzen chips launching today: the Ryzen 7 1800X, the Ryzen 7 1700X and the Ryzen 7 1700. These are set to be the top three chips that will be available for the foreseeable future. However, cheaper chips will be making an appearance later in the year.

All three are 8-core/16-thread chips, which are also multiplier unlocked for easy overclocking. This is great, but it rather begs the question of what differentiates the three and what defines the numbering/naming system AMD has used. So let’s break it down.

The easy bit is the first number. Just like Intel has Core i7, i5 and i3 to denote a general overarching summary of the performance level of the chip, so is the case with Ryzen. Ryzen 7 is “prosumer”, Ryzen 5 is high-end consumer and Ryzen 3 is mainstream.

Next is the second number, which is split into three parts. Like Intel, the first digit is the generation of the chip, so all the new Ryzen chips will start with a 1.

The next digit is essentially then a repeat of the first number, giving a broad indication of the performance level. Then follow two more numbers for further differentiation of the performance level.

Finally, at the end is an optional letter (normal processors don’t get a letter) An X denotes the extra XFR speed bump, plus there are various other options for low-power and mobile variants.

Product Line Model Base Clock (GHz) Boost Clock (GHz) TDP (Watts) Included Cooler Suggested Price
Ryzen 7 1800X 3.6 4 95 N/A $499/£480 inc VAT
Ryzen 7 1700X 3.4 3.8 95 N/A $399/£384 inc VAT
Ryzen 7 1700 3 3.7 65 Wraith Spire $329/£316 inc VAT

It seems logical enough, but when applied to the three chips launching today, it isn’t exactly clear. All three chips are essentially identical except for clock speed and XFR, but the numbering system seems to suggest they have different features.

In contrast, if you’re familiar with Intel’s labelling scheme then you can look at the name of a chip and pretty much determine its features and roughly the speed of which it’s capable. This isn’t the case with AMD’s system.

Regardless, the 1800X, 1700X and 1700 are priced at £499, £399 and £330 respectively, and AMD is pitching them as direct competition to the Intel Core i7-6900K, 6800K and 7700K.

However, while the 6800K and 7700K are roughly the same price as the 1700X and 1700, the 6900K is more than twice the price of the 1800X. As such, if it can deliver similar performance, the 1800X is going to be quite the bargain.

Meanwhile, the 7700K is only a quad-core chip going up against the eight-core 1700, which again suggests a possible big win for AMD. However, the 7700K is clocked considerably faster, and so will have the edge in single-threaded applications; it will be interesting to see how it performs.

AMD RYZEN 7 1800X – AM4 PLATFORM

Launching alongside Ryzen is the AM4 platform and five new chipsets. This will mean buyers have to get both a new motherboard and CPU if they want to invest in a Ryzen processor. However, AMD has committed to continuing to support AM4 for future CPUs, so you won’t have to upgrade your motherboard again too soon.

Moreover, AMD is using a single-socket and motherboard platform for its full range of CPUs. So even though there are no cheap CPUs available yet, when lower-priced Ryzen chips eventually launch, you’ll be able to buy a cheap motherboard and quad-core processor and still have the option of later upgrading all the way to the top-of-the-line eight-core chips.

In contrast, Intel requires you to jump to an expensive X99 motherboard to gain access to any of its processors with more than four cores.

That said, Intel still has an advantage when it comes to the raw power of its chipsets. The X99 chipset has a whopping 40 PCI-E lanes, allowing for huge multi-graphics card configurations and storage arrays. The current top AM4 chipset – the X370 – has just 20. This remains enough for a single x16 graphics card and x4 PCI-E SSD, but for truly extreme performance Intel still has an edge.

AMD Ryzen 7 1800X

Otherwise, AMD’s new chipsets are essentially just playing catch-up. You get DDR4 support, USB 3.1, PCI-E 3.0 and all the usual SATA ports and other connectivity options you’d expect. Both the X370 and B250 chipsets will also support overclocking, but only X370 will be able to handle multiple graphics cards. Meanwhile, the A320 chipset drops overclocking support.

The X300 and A300 chipsets are meant for small-form-factor systems, and they take an interesting approach. They’re essentially nothing more than a PCI-E interface to the CPU, with all other I/O and features left to motherboard manufacturers. This makes the chips tiny, in turn making them very low power and leaving plenty of room for motherboard manufacturers to optimise their board designs to fit the features they want.

AM4 uses a new cooler-mounting system. As a result, three new CPU coolers will be launching alongside Ryzen – although AMD freely admits that it expects users to buy alternatives. Indeed, the 1800X won’t be available at all with a cooler included. The new cooler-mounting system will mean that, depending on how existing coolers affix to the motherboard, many existing coolers won’t fit. Many will work with small tweaks, though.

Finally, thermal design power is another area AMD has made some gains. The 1800X and 1700X are 95W TDP chips, but the 1700 is just a 65W. In comparison, the Intel Core i7-7700K has a 91W TDP, while the 6900K and 6800K have a 140W TDP.

AMD RYZEN 7 1800X – PERFORMANCE

The 1800X is pitched directly at the Intel Core i7-6900K, so it is here that we’ve focused our testing – although we have included scores from our Core i7-7700K review too.

AMD Ryzen 7 1800X test system:

  • AMD Ryzen 7 1800X
  • MSI X370 Xpower Gaming Titanium
  • 2x8GB Corsair Vengeance LPX 3000MHz RAM
  • 480GB SanDisk Extreme Pro SSD
  • Asus Strix Gaming GeForce GTX 1070 (yes, an AMD CPU and Nvidia GPU can work fine together)

Intel Core i7-6900K test system*:

  • Intel Core i7-6900K
  • Gigabyte GA-X99-Ultra Gaming
  • 4x4GB Corsair Vengeance LPX 3200MHz RAM
  • 480GB SanDisk Extreme Pro SSD
  • Asus Strix Gaming GeForce GTX 1070

*We haven’t previously tested X99-based chips (on account of their ultra high price), so this data is gathered from third-party benchmark results. We’ll be adding our own X99 test results in due course, but for now the data gathered should still be of some use for early comparisons.

The go-to test for CPU speed is Cinebench, which renders a 3D scene purely using CPU power. It provides reliable results that indicate both single-core and multi-core performance.

AMD Ryzen 7 1800X

What’s immediately clear from the single-core test is that neither the 6900K nor the 1800X is close to being the fastest. The 7700K runs away with that record, which is hardly surprising given it’s clocked to a much higher 4.6GHz.

This may well have an effect on gaming performance, since many games running at lower resolutions are limited by the performance of the CPU rather than the graphics card. While I wouldn’t expect the difference to be significant, gamers might still be better off with a Kaby Lake CPU for a reasonable frame rate increase. I’ll report back once I’ve done more in-depth testing.

As such, it will be interesting to see if AMD can also offer higher clock speeds on its quad-core Ryzen products when they arrive. Otherwise, AMD may well be able to compete at the very high multi-core level but will still miss out to Intel when it comes to the combined single- and multi-core performance that’s the mainstay of mainstream performance.

AMD Ryzen 7 1800X

Looking at multi-core performance, though, it’s clear just how much AMD has caught up with Intel. The 1800X does indeed beat the 6900K on both single- and multi-core performance. For comparison, AMD’s previous record-holder – the three-year-old FX-9590 – topped out at 728 points.

I’ll update this review with further testing and thoughts on overclocking shortly.

AMD Ryzen 7 1800X

EARLY VERDICT

It’s clear that AMD has delivered with the AMD Ryzen 7 1800X. It comfortably beats everything Intel has to offer for the same price or less, and even beats the hugely pricey Intel Core i7-6900K. As such, if you’re looking to put together a new high-performance PC, for the first time in ten years I can recommend that you consider using an AMD CPU.

However, the true picture of just how big an impact the full AMD Ryzen launch will have on the CPU market – and PC market as a whole – won’t be clear until cheaper, less powerful chips arrive later this year. Having the multi-core performance crown for its price is all well and good, but most consumers aren’t looking to spend £500/$750 on a CPU and will want something substantially cheaper for gaming.

What will be crucial is whether AMD’s quad-core processors, in particular, can be run at the same sort of clock speeds as the likes of the Intel Core i7-7700K. If they can then we could be set for some truly interesting times.

Either way, what’s perhaps most exciting about the Ryzen launch is that it opens up the opportunity for users in the not too distant future to be able to buy one cheap motherboard and processor and know that they can potentially upgrade to eight-core performance – without the hassle and expense of switching to a higher-performance motherboard.

(trustedreviews.com, https://goo.gl/Dn8X0M)

 

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