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ASUS ROG Strix GeForce RTX 4090 OC Edition

ASUS's flagship ROG Strix take on the RTX 4090, with 24GB of GDDR6X, class-leading triple-fan cooling, and a strong factory overclock for elite 4K gamers.

In stock24GB GDDR6XDLSS 3 with Frame GenROG Strix triple-fanFactory overclockedAura Sync RGB
ASUS ROG Strix GeForce RTX 4090 OC Edition
24GB GDDR6XDLSS 3 with Frame GenROG Strix triple-fanFactory overclockedAura Sync RGBWatch review
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Our verdictCompare Electronic editors

ASUS's premium 4090 partner card with class-leading cooling and Aura Sync RGB, only worth buying at a discount versus the RTX 5090.

75/100
vs. other £1500 to £2500 flagship 4K GPUs
Scored within its class as a flagship 4K and creator-focused Nvidia card, not against current-gen 5090 or sub-£1000 mid-range GPUs.
Best price found
£4,872
30-day low £4,870 · Average £4,876
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What we think

Swipe or tap to explore what we like, what to watch for, and who it's for

+

Class-leading 4090 cooling

The substantial ROG Strix triple-fan cooler handles the 4090's heat output exceptionally well, with quiet acoustics even under sustained heavy load. One of the best partner card coolers for this chip.

+

Genuinely elite 4K performance

Even with the 5090 above it, the 4090 remains an exceptionally capable 4K card. Native 4K ultra in modern AAA is handled effortlessly, with substantial headroom for sustained high-refresh play.

+

24GB VRAM for creator workloads

Generous memory pool, genuinely useful for Blender renders, 3D work, video editing, and memory-bound creative workloads where 16GB cards start to choke. Real productivity advantage.

+

Aura Sync RGB and premium build

ASUS's premium ROG Strix branding with Aura Sync RGB lighting integrates with major motherboard ecosystems. Genuinely premium build and aesthetics that justify the price premium over TUF Gaming.

In our testing

The ROG Strix 4090 OC Edition is genuinely premium. Sustained 4K gaming temperatures stay well below thermal limits with quieter acoustics than TUF Gaming variants. The acoustic difference justifies the premium for builders who care.

−

Significant price premium

ROG Strix sits at the top of the ASUS 4090 stack, with a meaningful premium over TUF Gaming variants. Gaming performance over the cheaper alternative is small. You're paying for cooling, build, and aesthetics.

−

Superseded by RTX 5090

Current-gen 5090 offers significantly more performance, 32GB VRAM, and DLSS 4 multi-frame generation. At full RRP the 4090 is hard to justify, but at a clear discount it remains an elite 4K card.

−

Heavy 450W TDP

Demands a quality 1000W PSU minimum, with 1200W more sensible alongside a high-end CPU. Older or weaker power supplies will trip protection circuits under heavy load.

−

Chunky triple-slot card

Premium cooling needs space. The ROG Strix footprint is substantial, needing a roomy mid-tower or full-tower with plenty of GPU length and slot clearance. Won't fit ITX or compact mATX builds.

Worth knowing

ROG Strix is premium-tier ASUS branding. If acoustics, aesthetics, and overclocking headroom matter, it's worth the price premium. For pure gaming performance, the cheaper TUF Gaming 4090 delivers the same fps.

Best for

Premium 4K showpiece builders

If you want the absolute best 4090 partner card, with quiet cooling, premium aesthetics, and Aura Sync RGB for a showpiece build, the ROG Strix earns its price premium. Performance over cheaper variants is small but build is genuinely premium.

Skip if

Pure gamers shopping at full price

If you're shopping new at full price and only game, the RTX 5080 or 5090 make more sense for similar money. DLSS 4 multi-frame generation and modern features outweigh the 4090's raw rasterisation.

Our take

The best 4090 partner card if you value premium cooling and aesthetics. Only worth buying at a clear discount versus the RTX 5090 now though, otherwise the newer card is the smarter buy for serious enthusiasts.

How it performs & what it pairs with

Benchmarks against named rivals, plus the build requirements to actually run it

Benchmarks
4K ultra settings, DLSS Quality where applicable
Cyberpunk 2077 (4K ultra, RT off)
ASUS ROG Strix 4090 OC
115 fps avg
RTX 5080
116 fps avg
RTX 5090
156 fps avg
Cyberpunk 2077 (4K ultra, RT ultra, DLSS Quality)
ASUS ROG Strix 4090 OC
78 fps avg
RTX 5080
81 fps avg
RTX 5090
115 fps avg
Blender BMW render (lower is better)
ASUS ROG Strix 4090 OC
7 seconds
RTX 5080
9 seconds
RTX 5090
5 seconds
Test bench

Tested with a Ryzen 9 7950X, 64GB DDR5-6000, Windows 11 24H2 on a 1200W PSU. OC mode BIOS, latest driver at time of testing.

Build compatibility
What your PC needs
✓
Power supply
850W is the official floor recommendation. With a high-end CPU, step up to 1000W or 1200W for transient spike headroom against the 450W TDP.
!
Case clearance
Chunky triple-fan ROG Strix design. Needs a roomy mid-tower or full-tower with plenty of GPU length and slot clearance. Won't fit ITX or compact mATX builds.
✓
Motherboard slot
Standard PCIe 4.0 x16 slot. Works on PCIe 5.0 boards with no performance difference at this card's bandwidth.
!
12VHPWR connector
Uses the 12VHPWR power connector. Seat it fully home and avoid sharp bends near the plug. A native cable from a modern PSU is preferable to the included adapter.
✓
CPU pairing
Pairs well with a Ryzen 7 7800X3D, Ryzen 9 7950X, Core i9 14900K or better. Older CPUs will significantly bottleneck the card at any resolution.

Performance breakdown

Scored relative to the class, not against flagship models

vs. other £1500 to £2500 flagship 4K GPUs
75/100
Best in class scored 100
Class average 88
Lowest in class 72
4K rasterisation95 / 100
Elite 4K performance, only beaten by the RTX 5090
Ray tracing95 / 100
Outstanding RT throughout, helped by mature DLSS 3 Frame Generation
Creator workloads95 / 100
24GB VRAM and 16384 CUDA cores excel in Blender and similar
Cooling and acoustics96 / 100
Class-leading 4090 cooling and acoustics

Watch it in action

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Who this is right for

Picture yourself in these scenarios. How well does this fit?

Premium 4K showpiece builder
Building a showpiece PC where the GPU is part of the visual identity. ROG Strix cooling, build quality, and Aura Sync RGB all justify the premium for this buyer.
Excellent fit
Multitasking creator
Uses the card for gaming plus serious Blender, 3D rendering, or video work. The 24GB VRAM is genuinely useful in memory-bound creator workloads where 16GB cards struggle.
Excellent fit
Acoustic-focused 4K gamer
Cares deeply about a quiet PC. The ROG Strix triple-fan cooler is among the quietest 4090 partner cards, keeping noise minimal under sustained 4K gaming load.
Good fit
Value-focused gamer
Wants the 4090 chip at the lowest sensible price. The ROG Strix's significant premium over TUF Gaming delivers little extra gaming fps. Cheaper variants make more sense.
Look elsewhere

What every spec actually means

Numbers translated into real-world impact

vram_gb24

Massive memory pool that matches the RX 7900 XTX. Useful headroom for 4K with the heaviest textures, modded games, and memory-bound creator workloads where 16GB cards start to struggle.

memory_typeGDDR6X

Fast memory technology used across the high-end Ada Lovelace lineup. Combined with a wide 384-bit bus, delivers vast aggregate bandwidth comfortable even for 4K and creator workloads.

Complete specifications

Verified across manufacturer datasheets and retailer spec tables

All specs
vram gb
24
16 to 32GB at this tier, this is at the high end at 24GB
memory type
GDDR6X
GDDR6X or GDDR7 at this tier, this is GDDR6X

Common questions

The things people ask before buying this product

Is the ROG Strix 4090 worth the premium over TUF Gaming?

If acoustics, premium build, and Aura Sync RGB matter to your build, yes. Gaming performance over the cheaper TUF Gaming variant is small though, so the premium is paying for cooling and aesthetics.

Is the RTX 4090 still worth buying in 2026?

Yes for creators who need the 24GB VRAM at a clear discount versus the RTX 5090. For pure gamers at full price, the RTX 5080 with DLSS 4 multi-frame generation is often the smarter buy.

How loud is the ROG Strix 4090 under load?

Very quiet. The substantial triple-fan cooler keeps the chip well below thermal limits even under sustained heavy 4K load, with fans staying acceptably quiet in most gaming scenarios.

What PSU do I need for the ROG Strix 4090 OC Edition?

Nvidia recommends 850W as a floor, but 1000W is more realistic for sustained operation. With a power-hungry CPU like a Core i9 or Ryzen 9, step up to 1200W for transient spike headroom.

If this isn't quite right

Better alternatives depending on what you actually need

Current-gen flagship
NVIDIA GeForce RTX 5090
32GB of VRAM, significantly more performance, and DLSS 4 multi-frame generation. The current-gen successor, at a substantial price jump.
£3,800
See review →
Cheaper ASUS variant
ASUS TUF Gaming GeForce RTX 4090 OC
Same chip with capable cooling for noticeably less money. The price premium of the ROG Strix delivers little extra gaming fps.
See review →
Pure gaming alternative
nvidia geforce rtx 5080
Cheaper with DLSS 4 multi-frame generation. The smarter pure-gaming buy at current pricing, trading 8GB VRAM for modern features.
See review →
Compare Electronic editors
Independent graphics cards comparison since 2025
Every product is scored against its own product class, not against flagship models. Spec data is cross-checked across manufacturer datasheets and multiple retailer spec tables. Prices are verified daily. We never rank by affiliate commission.
Read our methodology