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ASUS ROG Strix RTX 3090 OC

ASUS's flagship ROG Strix take on the Ampere RTX 3090, with 24GB of GDDR6X, 2.9-slot triple-fan cooling, and Aura Sync RGB for premium used-market builds.

In stock24GB GDDR6XAmpere architectureROG Strix 2.9-slotAura Sync RGBDLSS 2 supported
ASUS ROG Strix RTX 3090 OC
24GB GDDR6XAmpere architectureROG Strix 2.9-slotAura Sync RGBDLSS 2 supportedWatch review
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£1,799›

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Our verdictCompare Electronic editors

ASUS's premium Ampere flagship with 24GB VRAM and class-leading cooling, only worth buying second-hand at a clear discount now.

75/100
vs. other ageing used flagship GPUs
Scored within its class as an ageing flagship previous-gen GPU, not against current-generation flagship cards or sub-£500 mid-range GPUs.
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£1,799
30-day low £1,799 · Average £1,799
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What we think

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

+

Generous 24GB VRAM allocation

Massive memory pool that matches modern RTX 4090 and RX 7900 XTX. Genuinely useful for Blender renders, 3D work, video editing, and modded gaming where memory often becomes the bottleneck.

+

Class-leading ROG Strix cooling

The substantial 2.9-slot triple-fan ROG Strix cooler with MaxContact heat spreader handles the 3090's substantial heat output exceptionally well, with quieter sustained operation than budget partner cards.

+

DLSS 2 with broad game support

Supports DLSS 2 upscaling, which works in many current games and substantially improves frame rates with good image quality. No DLSS 3 Frame Generation though, that requires RTX 40 or newer.

+

Aura Sync RGB and premium build

ASUS's premium ROG Strix branding with metal accents and addressable RGB lighting integrates with major motherboard ecosystems. Super Alloy Power II components and Auto-Extreme manufacturing for quality.

In our testing

The ROG Strix 3090 OC still goes toe-to-toe with the RTX 4070 SUPER in raw rasterisation. The 24GB VRAM and premium cooling remain its selling points at a clear used discount.

−

No DLSS 3 or DLSS 4 Frame Generation

Limited to DLSS 2 upscaling without Frame Generation, which is exclusive to RTX 40 and 50 series. Modern Nvidia cards roughly double their effective frame rates with Frame Generation, this can't.

−

Heavy 350W TDP

Demands a quality 850W PSU minimum, with 1000W more sensible alongside a high-end CPU. Older or weaker power supplies will trip protection circuits under heavy load.

−

End of driver support coming

Nvidia has phased out new game-day optimisation drivers for the older Ampere architecture. Cards still get security updates but no longer benefit from the latest game compatibility work.

−

Used condition varies dramatically

Used 3090 cards have been through years of heavy use, often including mining periods. Check seller history carefully, expect possible thermal pad refresh, and budget for a repaste if temperatures look high.

Worth knowing

The 3090's main 2026 selling point is the 24GB VRAM at a clear used discount versus modern 24GB cards. For creators on a budget, it can still make sense. For pure gamers, modern alternatives often win.

Best for

Budget creators wanting 24GB VRAM

If you find a used ROG Strix 3090 at a meaningful discount and need 24GB VRAM for Blender, 3D work, or video editing, the premium ROG Strix cooling and build remain genuine selling points.

Skip if

Pure gamers shopping new

If you're a pure gamer shopping at full price, modern RTX 5070 Ti or RX 9070 XT cards deliver better gaming with DLSS 4 features and current driver support at often-lower prices.

Our take

Only worth considering second-hand at a clear discount. Creator workloads benefit most from the 24GB VRAM, pure gamers should look at modern current-gen cards for similar money.

How it performs & what it pairs with

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

Benchmarks
1440p ultra and 4K settings, DLSS Quality where applicable
Cyberpunk 2077 (1440p ultra, RT off)
ASUS ROG Strix 3090 OC
106 fps avg
RTX 4070 SUPER
107 fps avg
RTX 5080
147 fps avg
Cyberpunk 2077 (4K ultra, RT off)
ASUS ROG Strix 3090 OC
64 fps avg
RTX 4070 SUPER
57 fps avg
RTX 5080
116 fps avg
Blender BMW render (lower is better)
ASUS ROG Strix 3090 OC
13 seconds
RTX 4070 SUPER
17 seconds
RTX 5080
9 seconds
Test bench

Tested with a Ryzen 9 7950X, 64GB DDR5-6000, Windows 11 24H2 on a 1000W PSU. OC mode BIOS, latest available Ampere driver.

Build compatibility
What your PC needs
✓
Power supply
850W is the realistic floor recommendation for the 350W TDP. With a high-end CPU, step up to 1000W for transient spike headroom.
!
Case clearance
Substantial 2.9-slot triple-fan ROG Strix cooler. 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.
!
Check used condition
Mining-era 3090 cards may have worn fans or dried thermal pads from heavy 24/7 use. Inspect before buying, ideally test under load, and budget for a possible repaste.
!
Driver support is limited
Nvidia has phased out new driver optimisation for Ampere cards. Newer games may not perform as well as on cards with active driver support, though security updates continue.

Performance breakdown

Scored relative to the class, not against flagship models

vs. other ageing used flagship GPUs
75/100
Best in class scored 88
Class average 72
Lowest in class 55
1440p rasterisation82 / 100
Strong 1440p performance, comparable to modern RTX 4070 SUPER
4K rasterisation70 / 100
Capable in older AAA, stretched in newer releases
Ray tracing65 / 100
2nd-gen RT cores, capable in older RT titles, stretched in newer
Creator workloads85 / 100
24GB VRAM and strong CUDA core count excel in Blender and similar

Watch it in action

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Who this is right for

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

Budget creator with 24GB needs
Uses the card for serious Blender, 3D rendering, or video editing where 16GB cards become limiting. The 24GB VRAM at used pricing makes the 3090 attractive against expensive new 24GB cards.
Excellent fit
1440p high-refresh gamer
Plays modern AAA at 1440p with everything cranked. The 3090 handles this well with DLSS Quality where supported, though without the DLSS 3 Frame Generation of newer cards.
Good fit
Premium used builder
Wants a premium-tier card at second-hand prices. The ROG Strix cooler and Aura Sync RGB deliver the premium feel of newer flagship partner cards at lower used pricing.
Okay fit
Modern AAA full RT enthusiast
Wants Cyberpunk path tracing or Alan Wake 2 with full RT cranked at 4K. The 3090's 2nd-gen RT cores trail modern equivalents significantly, will need heavy DLSS to stay playable.
Look elsewhere

What every spec actually means

Numbers translated into real-world impact

vram_gb24

Massive memory pool that matches modern RTX 4090 and RX 7900 XTX. Genuinely useful for Blender, 3D work, and modded gaming where 16GB cards start to struggle.

memory_typeGDDR6X

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

Complete specifications

Verified across manufacturer datasheets and retailer spec tables

All specs
vram gb
24
10 to 24GB at this used flagship tier, this is at the top at 24GB
memory type
GDDR6X
GDDR6 or GDDR6X at this tier, this is GDDR6X

Common questions

The things people ask before buying this product

Is the ROG Strix RTX 3090 OC still worth buying in 2026?

Only at a clear used discount and only if you need the 24GB VRAM. For pure gamers, modern RTX 5070 Ti or RX 9070 XT cards offer better gaming with DLSS 4 features at often-lower prices.

How does the RTX 3090 compare to the RTX 4070 SUPER?

Similar 1440p gaming performance, with the 4070 SUPER winning in DLSS 3 Frame Generation support and current driver optimisation. The 3090 wins on VRAM at 24GB versus 12GB.

What PSU do I need for the ROG Strix 3090 OC?

Nvidia recommends 750W as a minimum, but 850W is more realistic for sustained operation. With a power-hungry CPU like a Core i9 or Ryzen 9, step up to 1000W for transient spike headroom.

Is the 3090 good for Blender and 3D work?

Yes, the 24GB VRAM is genuinely useful for Blender renders and 3D work, especially compared to modern 16GB cards. Used 3090s remain a sensible budget creator pick for VRAM-bound workloads.

If this isn't quite right

Better alternatives depending on what you actually need

Current-gen alternative
nvidia geforce rtx 5080
Faster gaming performance with DLSS 4 multi-frame generation and current driver support. Trade-off is 16GB versus 24GB VRAM, fine for pure gamers but creators may prefer the 3090.
See review →
Cheaper Ampere sibling
nvidia geforce rtx 3080
Slower than the 3090 but at significantly lower used prices, with the trade-off of less VRAM at 10GB or 12GB depending on variant.
See review →
Step up for serious creators
NVIDIA GeForce RTX 4090
Significantly more performance with DLSS 3 Frame Generation and same 24GB VRAM. The serious choice for creators with budget to spend.
£4,283
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