Asus ROG G20CB review

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  • Solid 1080p and 1440p speeds
  • Modest noise output
  • Dramatic, illuminated case
  • Some rivals significantly faster
  • Inconsistent, slow SSD
  • Poor peripherals
  • Expensive

Key Features: 3.4GHz Intel Core i7-6700 processor; Nvidia GeForce GTX 970 4GB graphics; 16GB DDR4 memory; 128GB Hynix SSD; 2TB hard disk; Windows 10 64-bit; 1yr warranty; Manufacturer: Asus

Manufacturer: Asus

What is the Asus ROG G20CB?

The Asus G20CB is a small form-factor gaming PC adorned with the Republic of Gamers brand – a name and logo usually found on laptops and motherboards.

This machine is aiming high: it’s small, stylish and costs £1,400/$2,100. That puts it in competition with some of the more luxurious small PCs I’ve seen recently.

Asus G20

Design, Build Quality and Connectivity

The ROG features many of the style points that are typical on gaming systems, especially those from big-brand manufacturers.

It’s got LEDs on its front and base that can be customised in software, and the front and top panels are decorated with a striking, angular pattern – a design Asus says is inspired by Mayan tribes.

The plastic used has a matte finish – again, normal for many gaming PCs as well as consoles – and is constructed using what Asus calls “aggressive” lines. In reality, that means the G20CB is thicker at its base and tapers to a narrower top section with a cut-away design. It also means that the side panels are angled, which prevents this machine from laying on its side.

The C20CB is not large. It’s 104mm wide at its thickest point and 61mm across at the top, and 340mm tall. That’s about as tall as the Alienware X51 and only 9mm wider at the base. It also compares favourably to the Chillblast Fusion Fury Nano, which is around 100mm shorter than the Asus but 190mm wide.

Elsewhere, this machine’s design is a mix of sensible and strange. The cooling system is smart, with no huge fan exhausts – instead, air is expelled through heatsinks in the fins at the top of the system and through a 1cm-wide channel at the base of the machine.

However, the power supply is awkward: two laptop-style power bricks held together in a frame, with two kettle leads required.

The system can be opened by removing two screws and sliding away one side of the case – easy enough. Once inside, though, components aren’t as easy to access as on more conventional desktop machines.

Everything is in a cage: the graphics card sits along one side of the case, the hard disk is another small cage, and the small cooling fans sit above the rest of the components, all of which are locked down. It’ll take a lot of effort to change anything on the inside – and, in any case, opening the machine voids its warranty.


The G20CB comes with a reasonable specification. The graphics card is an Nvidia GeForce GTX 970, which means it’s one of the most powerful single-GPU cards around today: 1,664 stream processors, a 1,050MHz stock clock that reaches 1,250MHz with GPU Boost, and 4GB of dedicated 1,753MHz GDDR5 memory.

Alienware’s machine looks weaker because of its GTX 960 card – a product designed for single-screen gaming – but Chillblast’s system goes further with AMD’s Radeon R9 Fury Nano, which is a high-end card designed for tiny PCs. The G20’s choice is a pretty good middle ground.

The Asus machine’s processor is a Core i7-6700. It uses the 14nm Skylake architecture and has four Hyper-Threaded cores that begin at 3.4GHz and top out at 4GHz. That’s good, but it’s not as good as rivals: they both have the Core i7-6700K. That chip runs at 4GHz with a Turbo speed of 4.2GHz, and it’s unlocked for overclocking – so in the Chillblast machine it runs at 4.6GHz.

The G20CB includes a normal 16GB of memory, and the storage follows the conventional pattern of an SSD with a hard disk. The former is a 128GB Hynix drive, and the latter is a 2TB unit. That’s fine, although rivals are better: the Alienware and Chillblast machines both have 256GB SSDs.

Connectivity is reasonable. The front panel has two USB 3.0 ports, with four more on the rear, and there are six audio jacks. The graphics card has the full gamut of connections: DVI, HDMI and DisplayPort.

On the inside, connectivity is normal: Gigabit Ethernet, 802.11ac wireless and Bluetooth.

The components in this machine run on the H170 chipset. That’s one of the parts that Intel introduced with Skylake processors and the LGA 1151 processor socket. It’s technically not as capable as the Chillblast’s Z170 chipset in a couple of areas but none that are relevant to a physically fixed machine such as this.

My sample is a relatively high-end model, but it’s not the only version that Asus builds. Two other models are available in the UK: the G20AJ and the G20BM.

Asus ROG G20CB

The G20BM is the more affordable of the two alternative specifications. It costs around £730/1,095, but makes do with an AMD FX-770K processor that’s only got two cores and a Radeon R7 370 graphics card – that’ll handle 1080p gaming but will struggle with anything higher. It also lacks an SSD – a fundamental flaw. The G20AJ costs £947/$1,421 and includes a Core i5-4460 processor and GTX 960 graphics.

The Asus’ rivals also have alternative specifications. Chillblast’s machine has one other option: a £1,500/$2,250 model that uses an overclocked Core i5-6600K processor.

Alienware offers a wider variety of alternatives to the specification my colleague examined. The most affordable machine costs £629/$944 but makes do with a Core i3 processor and a GTX 745 GPU – barely enough for 1080p. A £949/$1,424 machine includes the Core i7-6700 CPU and a Radeon R9 370 graphics card, and paying £1,049/$1,573 unlocks the i7-6700K processor.

The G20CB includes a one-year warranty. That’s standard for consumer electronics, but it looks poor when stacked up against the Chillblast and its five-year deal.


On paper the Asus’ GTX 970 card falls ahead of the Alienware but behind the Chillblast, and that’s what happened in the benchmarks.

Asus ROG G20CB

The Republic of Gamers system never balked at 1080p playback. Its best result here came in Bioshock Infinite, where it averaged 111fps – forty frames ahead of the Alienware – and even in Crysis 3 it managed a smooth 71fps. That means essentially any game will be playable at this resolution.

The 2,560 x 1,440 resolution is tougher, but the Asus continued to perform with aplomb. It romped through Crysis and Battlefield 4 at averages of 42fps and 49fps, and hit 51fps in Middle Earth: Shadow of Mordor.

That’s better than the Alienware, which only managed 31fps in Shadow of Mordor, but it’s not as good as the Chillblast. The AMD-powered system scythed through Crysis and Battlefield at 60fps.

The Asus machine’s GPU is good enough for 1080p and 1440p gaming, but it struggles at 4K. Its only playable average came in Bioshock Infinite, where it managed 35fps – but its 20fps minimum means that gameplay won’t always be smooth. Its best result elsewhere came in Shadow of Mordor, but even then it could only manage 27fps.

This category is really where the Chillblast machine pulls ahead. That system managed 32fps in Battlefield at 4K, and then 45fps in Shadow of Mordor – it only faltered in Crysis with an average of 27fps. It’s not a clean bill of health, but the Fusion is at least capable of playing at 4K with minimal graphics settings – whereas the Asus will struggle in the vast majority of top-tier games unless graphical fidelity is severely compromised.

Asus G20

The Asus proved middling in theoretical tests, too. Its Unigine Extreme average framerate of 52.2fps is around ten frames behind the Chillblast, and it scored 9,578 in the 3D Mark Fire Strike test – good, but almost 3,000 points behind the Fusion Fury Nano.

The stock-speed Core i7 processor is fine, but it’s unable to keep up with either of its rivals – unsurprising, given they both boast that K-edition chip.

The G20CB’s Geekbench result of 15,658 is excellent, but the Alienware scored 16,533 in the same test. In PC Mark 7 the Asus scored an impressive 6,963 – but the overclocked Chillblast managed to hit 8,288 in the same test.

The Asus machine, at least, never gave us problems in thermal tests. The processor’s peak temperature of 82 degrees is fine, and the graphics card peaked at 79 degrees. The processor temperature in particular is good – the Chillblast machine’s CPU was far hotter.

Asus makes big claims about this machine’s noise output, and I’m pleased to report that the G20CB delivers. When games aren’t running it may as well be silent – I had to press my ear against the case to even make out any fan noise.

It’s not much louder during games; there’s a little whirr that’s louder than the idle noise, but it’s as quiet as the consoles, which also means it makes less noise than most gaming systems. If it’s placed in a living room it’ll certainly be discreet.

I only hit issues during a stress-test of the processor and graphics card. Here the Asus produced a higher-pitched whine that’s louder than consoles, but it’s unlikely that this machine will ever run at 100% load for a significant length of time.

The final tests examine the storage. The Asus has a 128GB Hynix SSD on-board, but it failed to impress in benchmarks. Its sequential read score of 485MB/s is about what I expect from a modest SSD, but its write pace of 176MB/s is dreadful – barely better than normal hard disks.

It’s a long way behind rivals. The Alienware and Chillblast machines both deploy Samsung M.2 SSDs, and both excelled: those drives delivered reads beyond 1,500MB/s, and the Chillblast hit 1,196MB/s in the file write benchmark.

In practical terms, those results will make the Asus noticeably slower to respond when loading games and booting.

Asus ROG G20CB

Other Things to Consider

Asus includes several different apps to help manage the G20CB. Many tools are contained in the Aegis app, which acts as an overlay across the desktop. Clicking an option loads a widget: some monitor the CPU, GPU and memory, others display network traffic, and a world map with different timezones.

Elsewhere, the Aegis tool serves up a module for altering the case’s LEDs – any colour can be chosen, alongside pulsing patterns – and a tool called GameAlive that’s used for hotkeys and screenshots.

There’s a SoundBlaster app for audio management, and a Republic of Gamers GameFirst tool for managing network traffic.

The last app is designed to manage the mouse that Asus includes with this machine, but it wouldn’t even connect to my rodent – an apt metaphor for the peripherals boxed with the G20CB.

The mouse is a wireless device that looks like a gaming peripheral, but it’s basic – there’s a button on the top to alter the DPI between levels, but that’s it as far as extra features go. Its two main buttons are fine – fast and responsive – but they lack the firm action of proper gaming mice, and the buttons feel a little flimsier than on dedicated peripherals.

The keyboard is worse. It’s narrow and flimsy, with low-profile buttons that lack travel and have a soft, slightly sluggish action. The unit is adequate for typing, but this is a gaming PC – and gaming keyboards usually have taller keys, a faster typing action and a firmer, more distinct feel. The lack of height to the keys also makes it tricky to tell buttons apart during intense gameplay.

Asus G20

Should I Buy the Asus ROG G20CB?

The G20CB gets off to a reasonable start with its dramatic, illuminated enclosure, but it quickly goes downhill thanks to its poor versatility. More seriously, the G20CB can’t compete in benchmarks. Its processor is decent but slower than both competitors, and the GTX 970 GPU can’t match the AMD card inside the admittedly pricier Chillblast – and it’s unable to play games at 4K, which makes the GTX 960 found inside many different and cheaper Alienware x51 models look more tempting.

That’s not the end of this machine’s problems. Its SSD is underwhelming, the peripherals are poor, and the one-year warranty looks bad alongside Chillblast’s five-year deal.

If I were spending £1,400/$2,100 on a gaming system, I’d save a little extra and step up to the Chillblast Fusion Fury Nano £1,500/$2,250 or £1,655/$2,483 models: both are far better. Alienware’s machine is fast enough for single-screen gaming and has better alternative options, all of which are cheaper than this.

The G20CB is an expensive system that falls behind rivals in every important area. If I was after a small gaming PC I’d look to any number of competitors before choosing this.


The Asus looks good, but its case isn’t practical – and that’s just the start of its issues. Its gaming performance can’t match some rivals, the processor lags behind the competition, and its SSD is sluggish. The warranty and peripherals disappoint, and the price is far too high. Look elsewhere for a small gaming PC.




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