Nvidia GeForce RTX 3090 review: Caught between two worlds

This beast of a card is neither fish nor fowl

IT Pro Verdict


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    Fastest consumer GPU we’ve seen

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    SLI compatibility

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    Twin HMDI ports


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    Extremely expensive

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    Limited performance improvement over RTX 3080

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    Mediocre scientific and engineering performance

Nvidia’s latest series of RTX GPUs bills itself on performance, and the top-of-the-line RTX 3090 is the most powerful of the lot. This titanic graphics card is the most advanced consumer model yet produced by the company, and it boasts a truly mighty specification - along with a price tag to match.

This card is astonishingly expensive, even by the usual standard of computer hardware - you could buy a moderately capable workstation for the price of this GPU alone. Of course, when we talk about price, we’re referring to the RRP, but at time of writing, you’d have better luck finding the lost city of Atlantis than finding a 3090 selling for the recommended price. In fact, you’d be lucky to find one at all. For the purpose of this review, however, we’ll be using the RRP as a benchmark.

The specific card on review is Gigabyte’s GeForce RTX 3090 GAMING OC 24G - a partner card with all of the usual hallmarks of such, including a modest overclock, a snazzy design and some advanced cooling features. Performance should be largely the same across all variants, however.

Nvidia GeForce RTX 3090 review: Design

Partner cards often try and stand out from the crowd with flashy, eye-catching designs, but while Gigabyte has injected a little visual personality into this GPU’s appearance, the overall effect is comparatively sedate. There’s a few angular flourishes to the body, but garish colour schemes are mercifully absent, and the only RGB lighting is the company’s logo on the side. It also feels sturdier and more robust than any other GPU we’ve tested, thanks to a solid metal backplate protecting the circuitry.

All in all, it’s about as sober and professional-looking as you could reasonably expect a consumer graphics card to be, which is doubly impressive considering how much space there would be for fancy design gimmicks. Appropriately for the top of the RTX range, it’s a bit of a monster in terms of size, at 320mm long and 55mm thick. However, while that’s certainly sizeable, it’s actually slightly smaller than Zotac’s RTX 3080. Technically it takes up three PCIe slots, rather than the two and a half demanded by Zotac’s card, but there’s minimal difference in practicality.

A photograph of the Gigabyte GeForce RTX 3090 GAMING OC 24G's input ports

For cooling, Gigabyte has used seven copper heat pipes, fin-stack aluminium heatsinks and a large copper plate for heat dissipation. That’s in addition to the fans. There are two 90mm fans at the front and rear of the card which spin anticlockwise, and one 80mm fan in the middle which spins in the opposite direction. This, according to Gigabyte, makes the fans more stable and increases air pressure for more efficient cooling.

Nvidia GeForce RTX 3090 review: Specs and performance

All that cooling is going to be necessary for this graphics card to live up to its promises in the power department. It’s got a staggering spec, with 10,496 CUDA cores, a jaw-dropping 24GB of GDDR6X memory and a base clock speed of 1,755MHz. Sadly, those promises turned out to be somewhat insubstantial when we ran it through our tests, conducted on our test machine (provided by Chillblast) with 32GB of RAM and an AMD Ryzen 5 5600X processor.

It racked up meaty enough scores in the Octanebench 2020 and Luxmark 3.1 GPU rendering tests - 673 and 18,913 respectively, compares to 565 and 16,093 for the 3080. It put in an extremely proficient performance in SPECviewPerf 2020’s more enterprise-focused tests as well.

Scores of 195.16 for 3dsmax-07, 391 for solidworks-05 and 529 for maya-06 are some of the highest we’ve ever seen, so media professionals and creatives will be extremely happy. Performance for the rest of the engineering, medical and scientific workloads were unimpressive compared to professional cards like Nvidia’s Quadro line, but that’s de rigeur for a consumer card, and only to be expected.

That’s a seriously powerful performance, and one befitting the RTX 3090’s place at the top of Nvidia’s lineup - so why did it leave us disappointed? As with many things, the answer comes down to cost. The 3090 costs more than twice as much as the 3080, and that’s just based on recommended prices, without taking current fluctuations into account. For that money, you’d expect the 3090 to be twice as good as the next model down, but that’s not the case.

A closeup of the Gigabyte GeForce RTX 3090 GAMING OC 24G's heatsinks and heat pipes

Instead, the biggest difference between it and the 3080 was in the 3dsmax-07 test - where it managed a 25% lead - and in some tests, the performance advantage was less than 10%. Admittedly, this does make the 3090 the fastest of the RTX range by a clear margin, but that’s a poor argument for dropping so much money on a single component. Although it possesses overwhelming firepower, the price you’re paying for it is somewhat outsized.

Nvidia GeForce RTX 3090 review: Specs and features

You could, on the other hand, make the argument that it’s the features that differentiate this card from its stablemates. It’s the only RTX that supports multi-GPU configurations via SLI, for example, and it’s also sporting two HDMI 2.1 ports in addition to three DisplayPort 1.4a outputs, while the rest of the 3000-series only include one.

Otherwise, however, it’s pretty much the same as the rest of the line. It includes second-generation ray tracing cores and third-generation tensor cores, OpenGL 4.6 support, DLSS for AI-based framerate boosting, and support for four monitors and a 7,680 x 4,320 maximum resolution.

Nvidia GeForce RTX 3090 review: Verdict

If you want the very best, you’ll usually have to pay the price, and that’s certainly true with Nvidia’s top-tier consumer GPU. However, while the RTX 3090 is inarguably the most capable card in the company’s non-professional stable, we can’t recommend it outside of a handful of very specific niche use-cases.

If you’re after a workstation with the grunt to blaze through media, modelling and rendering workloads, then the 3080 is almost as powerful but costs half as much, while those seeking optimum performance for engineering and scientific workloads will find much more suitable speeds for those applications with a Quadro card.

The only practical way in which the RTX 3090 sets itself apart is its support for multi-GPU deployment via SLI. If you’re looking to bridge the gap between a standard workstation and a GPU compute server, then cramming two 3090s into the same box may fit the bill - but for virtually every other conceivable workload, one of its stablemates will likely make a better bet.

Gigabyte GeForce RTX 3090 GAMING OC 24G specifications

Swipe to scroll horizontally
Stream processors10,496
Base clock1,395MHz
Boost clock1,755MHz
ConnectivityPCIe 4.0 16x
Display outputs3x DisplayPort 1.4, 2x HDMI 2.1
Max resolution7680 x 4320 @60Hz
Power connections2x 8-pin
Supported APIsMicrosoft DirectX 12 Ultimate, Vulkan RT API, OpenGL 4.6
Adam Shepherd

Adam Shepherd has been a technology journalist since 2015, covering everything from cloud storage and security, to smartphones and servers. Over the course of his career, he’s seen the spread of 5G, the growing ubiquity of wireless devices, and the start of the connected revolution. He’s also been to more trade shows and technology conferences than he cares to count.

Adam is an avid follower of the latest hardware innovations, and he is never happier than when tinkering with complex network configurations, or exploring a new Linux distro. He was also previously a co-host on the ITPro Podcast, where he was often found ranting about his love of strange gadgets, his disdain for Windows Mobile, and everything in between.

You can find Adam tweeting about enterprise technology (or more often bad jokes) @AdamShepherUK.