MSI RTX 4090 24GB SUPRIM X Review: The Absolute Flagship GPU

The GPU market doesn't sit still. What looked like daylight robbery at launch can quietly become the only serious option once the competition fails to materialise, prices settle, and the architecture matures. That's exactly where the RTX 4090 finds itself in 2026. And the MSI Gaming GeForce RTX 4090 24GB GDRR6X 384-Bit SUPRIM X isn't just any RTX 4090. It's MSI's absolute flagship take on NVIDIA's most powerful consumer GPU, dressed up with their Tri-Frozr 3 cooler and a factory overclock on top of an already monstrous chip.

So here's the verdict, upfront: this is the best graphics card you can buy right now. Full stop. If you're building a serious 4K gaming rig, doing professional creative work, or you simply refuse to compromise on anything, this is it. The 126 owner reviews average ★★★★½ (4.5), and the consistent message is that it runs cool, stays quiet for its class, and absolutely obliterates everything thrown at it. But. And this is a big but. The price is genuinely eye-watering, it draws enough power to make your electricity supplier smile, and unless you genuinely need the very best, there are smarter ways to spend your money. We'll get into all of that.

This isn't a card for everyone. It's barely a card for most people. But if you're the person it's made for, you already know it, and you want to know whether the SUPRIM X version specifically is worth it over a cheaper 4090 variant. Spoiler: it largely is.

The SUPRIM X specifically carries MSI's factory overclock, pushing the boost clock to 2,610 MHz versus the reference 2,520 MHz. That's not a massive gap, but it's there, and it's stable from the factory, which is more than you can say for some aggressive OC editions from other brands. The card pulls a rated 450W TGP, requires a 850W PSU at minimum (though 1000W is the sensible recommendation), and connects via NVIDIA's 16-pin PCIe 5.0 power connector, with an adapter included for those still on traditional 8-pin setups.

Display output is four ports: three DisplayPort 1.4a and one HDMI 2.1. That covers 4K at 144Hz, 8K at 60Hz, and everything in between without breaking a sweat. NVLink support is listed too, though multi-GPU gaming is essentially dead as a use case. It's more relevant for professional workloads if you're running two of these in a workstation.

The third-generation RT cores are a genuine leap. Ray tracing performance on Ada is roughly twice what Ampere managed at equivalent rasterisation levels. In practical terms, that means titles like Cyberpunk 2077 with full path tracing enabled are actually playable on this card, especially once DLSS Frame Generation gets involved. The fourth-generation Tensor cores underpin DLSS 3 and DLSS 3.5 (Ray Reconstruction), and they're doing a lot of heavy lifting in modern titles. These aren't just marketing bullet points. They're the reason this card stays relevant in ways that previous flagship GPUs didn't.

The shader multiprocessor count of 128 SMs, each with 128 CUDA cores, gives you that 16,384 total. For context, the RTX 3090 had 10,496 CUDA cores. The jump is significant. But raw CUDA core counts don't tell the whole story because the cores themselves are more capable per clock in Ada than they were in Ampere. The combination of more cores, faster clocks, and a better architecture per core is what produces the real-world performance gap you see in published benchmarks.

Ada Lovelace's boost behaviour is interesting. Unlike some previous NVIDIA architectures that would hit their rated boost clock briefly and then throttle back under sustained load, Ada tends to sit at or very close to its rated boost clock for extended periods, provided the cooler is doing its job. The Tri-Frozr 3 is absolutely doing its job here. Owner reports consistently describe the GPU holding its boost clock without significant throttling even under sustained gaming loads, which is exactly what you want from a card at this price point.

MSI also includes their Dragon Centre software (now Gaming Centre in newer versions) which lets you switch between Silent, Gaming, and OC modes. Silent mode drops the clocks slightly to reduce fan noise. Gaming mode is the default balanced profile. OC mode pushes to that 2,610 MHz figure. For most gaming use, Gaming mode is perfectly sensible. If you want to push further, the card has headroom for additional manual overclocking, and owners report being able to squeeze extra performance out of it without much drama, though the power limit becomes the ceiling fairly quickly at 450W.

At 4K with maximum texture settings in modern titles, VRAM usage can push past 12GB in demanding games. Some titles with high-resolution texture packs, like modded Skyrim or Hogwarts Legacy at maximum settings, can touch 16GB. The 4090's 24GB buffer means you're never going to see the stuttering, pop-in, or performance degradation that comes from VRAM overflow. Cards with 12GB or 16GB can start to struggle in certain scenarios at 4K max settings, particularly as more titles ship with higher-quality assets. This card doesn't have that problem.

The GDDR6X memory type and 384-bit bus width are also worth appreciating. The bandwidth of 1,008 GB/s is nearly double what the RTX 4080 Super manages (736 GB/s) and significantly more than AMD's RX 7900 XTX (960 GB/s). For GPU-accelerated workloads like AI inference, video editing, and 3D rendering, that bandwidth is as important as raw compute. If you're running Stable Diffusion locally, doing DaVinci Resolve work, or using this card professionally alongside gaming, the VRAM and bandwidth combination is a genuine differentiator. This is partly why the card commands such a premium. It's not just a gaming card. It's a workstation card that also games.

DLSS 3 with Frame Generation is the other major card to play here. Frame Generation uses the Tensor cores and optical flow accelerator to synthesise additional frames between rendered frames, effectively doubling (or more) the perceived frame rate in supported titles. At 4K with demanding settings, this can push frame rates into territory that feels genuinely smooth rather than just technically playable. DLSS 3.5 adds Ray Reconstruction, which improves ray-traced image quality by using AI to denoise RT output rather than relying on traditional denoising algorithms. The result in supported titles is noticeably better ray-traced reflections and lighting. These features are exclusive to RTX 40-series cards.

DLSS image quality at the Quality preset (rendering at roughly 67% of native resolution) is excellent. At 4K output, that means rendering at 1440p, and the upscaled result is genuinely difficult to distinguish from native 4K in motion. Balanced and Performance presets show more softness, but even Performance mode at 4K is cleaner than most people expect. AMD's FSR 3 is available on this card too, and while FSR 3 is competitive, DLSS 3 with Frame Generation remains the better experience on RTX hardware. The Tensor core advantage in upscaling quality is real, and it's one of the stronger arguments for NVIDIA at this tier.

NVDEC (the decode engine) handles AV1 decode acceleration too, which matters for video editing workflows where you're working with AV1 source footage. DaVinci Resolve, Premiere Pro, and other professional applications can leverage NVENC for accelerated export, and the 4090's encoder is fast. Exporting a 4K timeline in Resolve is noticeably quicker with NVENC than CPU encoding, and the quality is comparable to a good software encode at equivalent settings.

For streamers specifically, the dual NVENC encoder setup (the AD102 has two encode engines) means you can encode your stream and a local recording simultaneously without the quality or performance hit you'd see on a card with a single encoder. If you're a serious content creator who also games, the 4090's encoding capabilities are a legitimate part of the value proposition, not just a footnote. Owner reviews mention this specifically, with several noting that the card handles streaming 4K content while gaming without any noticeable performance impact on the game itself.

The 16-pin PCIe 5.0 connector (12VHPWR) is the required connection. MSI includes an adapter that converts four 8-pin connectors to the single 16-pin plug. If you're using this adapter, make sure all four 8-pin connectors are connected and properly seated. There were early reports with some 4090 implementations of the 16-pin connector melting under load, a problem that was traced to improperly seated connectors and was addressed with revised connector designs. The SUPRIM X uses a right-angle connector design that reduces strain on the cable, and owner reports don't flag this as an ongoing concern. But use a proper 16-pin native cable from a quality PSU if your PSU supports it.

Realistically, you want an 850W PSU as a minimum, and 1000W gives you proper headroom and future-proofing. Brands like Seasonic, Corsair, and be quiet! make excellent 1000W units with native 16-pin cables. The power consumption is the honest downside of this card. It runs your electricity bill up noticeably compared to a more efficient card like the RTX 4080 Super, which delivers perhaps 85% of the 4090's performance at around 320W. If you're in the UK paying current energy rates, that difference adds up over time. It's worth factoring into the total cost of ownership, especially if you game for many hours a week.

Owner reviews are consistent on thermals: the card runs cool. Multiple owners report GPU temperatures staying well under 80 degrees Celsius under sustained gaming loads, with several mentioning figures in the low to mid 70s. That's genuinely good for a 450W card. The memory junction temperatures (which were a concern on some RTX 3090 implementations) are also reported to be well-managed, which matters for long-term reliability. GDDR6X runs hot by nature, and a cooler that keeps junction temps in check is protecting your investment.

The card is physically large, at roughly 336mm long and nearly three slots wide. Case compatibility is a real consideration. If you're building around this card, you need a full tower or a large mid-tower with good internal clearance. Several owner reviews mention checking case compatibility carefully before purchase, and it's worth doing. The weight is also substantial, and MSI includes a GPU support bracket in the box, which owners consistently praise as a thoughtful inclusion. Sag on a card this heavy in a vertical motherboard mount is a genuine concern without support, and MSI has clearly anticipated this.

Under gaming load, the fans spin up, and the character of the noise is important. Owner reviews describe the SUPRIM X as quiet for a 450W card, which is a meaningful qualification. It's not silent under load. It's not going to be. But the noise profile is described as a smooth, low-pitched whoosh rather than the high-pitched whine that plagues some coolers. The fan curve appears well-tuned from the factory, ramping up gradually rather than jumping aggressively at load onset. Several owners specifically comment that the card is quieter than they expected given the power draw, which is a good sign that MSI's thermal and acoustic engineering is working as intended.

If acoustic performance is your absolute top priority, the SUPRIM X is one of the better 4090 variants to consider. The ASUS ROG STRIX 4090 is the other main contender in this space, and the two are broadly comparable in noise levels from what owner feedback suggests. Both are significantly quieter than blower-style coolers or poorly designed open-air coolers. The Founders Edition, for reference, is also well-regarded acoustically, but the SUPRIM X's larger cooler gives it a slight edge in keeping fan speeds lower for equivalent temperatures. That's the basic physics of it: more heatsink surface area and more fan swept area means you can move the same amount of heat with less aggressive fan speeds.

At 4K with maximum settings and no upscaling, the 4090 class typically delivers well above 60fps in most modern titles, and often well above 100fps in less demanding ones. With DLSS Quality mode engaged, those numbers climb further, and with Frame Generation on top, you're in territory where even the most demanding games feel genuinely smooth. At 1440p, the card is almost absurdly fast. It can push frame rates high enough to feed a 240Hz display in many titles, which is relevant if you're pairing it with a high-refresh-rate 1440p monitor rather than a 4K panel. At 1080p, the card is bottlenecked by the CPU in most scenarios. It's not the right card for 1080p gaming. Nobody buying a SUPRIM X is gaming at 1080p.

The performance advantage over the RTX 4080 Super (the next card down the NVIDIA stack) is roughly 20 to 30 percent depending on the title and resolution. At 4K, the gap is at its largest. In ray-traced workloads, the gap widens further because the 4090's additional RT cores and VRAM both contribute. Whether that gap justifies the significant price premium over the 4080 Super is the central question for most buyers, and honestly, for pure gaming, it probably doesn't for most people. But for those who want the absolute best, or who have professional workloads that benefit from the extra VRAM and compute, the premium makes more sense.

Between the SUPRIM X and the ROG STRIX 4090, the differences are small. The ROG STRIX carries a slightly higher factory OC in some configurations, while the SUPRIM X is often praised for its cooler aesthetics and the included GPU bracket. Thermals and acoustics are comparable. Software ecosystems differ: MSI uses Gaming Centre, ASUS uses GPU Tweak III and Armoury Crate. Neither software is without its quirks. Owner satisfaction is high on both. The choice often comes down to aesthetics, case compatibility (the ROG STRIX is even larger), and which is available at the better price at the time of purchase.

The RTX 4080 Super is the more interesting comparison because it represents the honest value question. It delivers roughly 75 to 80 percent of the 4090's gaming performance at a substantially lower price, runs at 320W versus 450W, and fits in cases that would reject the SUPRIM X. For pure 4K gaming without professional workload requirements, the 4080 Super is genuinely the smarter buy for most people. The 4090 makes sense when you need the 24GB VRAM for professional work, when you want Frame Generation headroom at 4K max settings in every title, or when you simply want the best and cost isn't the deciding factor.

The 126 owner reviews averaging ★★★★½ (4.5) tell a consistent story: buyers are happy. The complaints that do appear are mostly about size (it's enormous, plan your case accordingly) and power draw (it's 450W, plan your PSU accordingly). Nobody's complaining about performance or reliability. That's a good sign for a card that's been in the market long enough for real-world longevity data to emerge.

For professional users doing AI work, video production, 3D rendering, or any GPU-accelerated compute task alongside gaming, this card makes a genuinely strong case. The 24GB VRAM and compute throughput are workstation-grade, and buying one card that does both jobs properly is a reasonable proposition. The NVIDIA RTX 4090 platform is also well-supported by CUDA and TensorRT for professional software, which matters if you're running anything beyond games.

But here's the honest bit. If you're a pure gamer, even a serious 4K gamer, the RTX 4080 Super is probably the smarter buy. It delivers the vast majority of the 4090's gaming performance, runs cooler and quieter in absolute terms, draws 130W less, fits in more cases, and costs significantly less. The 4090's performance advantage is real but not transformative for gaming alone. You're paying a substantial premium for the last 20 to 25 percent of performance and the VRAM headroom. If you need those things, great. If you're not sure you do, you probably don't.

The SUPRIM X specifically, within the 4090 range, is a genuinely good implementation. It's not the cheapest 4090 you can find, but it's not priced absurdly above reference either. The cooler quality, build quality, and the included accessories justify the premium over budget 4090 variants. If you're spending flagship money on a flagship GPU, spending a little more to get a proper flagship cooler makes sense. Cutting costs on the cooler when you're already this deep in the premium segment is a false economy.

Rating: 9 out of 10. Loses a point only because the price is genuinely difficult to justify for pure gaming, and the power draw is a real ongoing cost. Everything else is as good as it gets.

Current pricing: £4,992.37 | Rating: ★★★★½ (4.5) from 128 owner reviews