ASUS - ROG Astral RTX 5090 OC vs NVIDIA - GeForce RTX 4090
Between the ROG Astral RTX 5090 OC and GeForce RTX 4090, the ROG Astral RTX 5090 OC comes out ahead in 3dmark time spy and vram, while the GeForce RTX 4090 wins on tdp. Overall, the ROG Astral RTX 5090 OC scores 91.4 and the GeForce RTX 4090 scores 80.3 on our Mars Score.
Which should you buy?
The ROG Astral RTX 5090 OC is the clear pick on raw spec strength, leading by 11.1 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the ROG Astral RTX 5090 OC if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. The biggest gaps in its favor are 3dmark time spy, vram, memory bus, among others.
Pick the GeForce RTX 4090 if you care most about tdp. Its strongest claims are tdp.
Both ship with comparable dlss, so those specs don't separate the two — focus on the differences below.
Bottom line: the ROG Astral RTX 5090 OC is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why ASUS - ROG Astral RTX 5090 OC wins
- ▲3DMark Time Spy — 57.14% more. 44000 vs 28000.
- ▲VRAM — 33.33% more. 32 GB vs 24 GB.
- ▲Memory bus — 33.33% more. 512 bit vs 384 bit.
- ▲CUDA / Stream cores — 32.81% more. 21760 vs 16384.
- ▲Ray tracing cores — 32.81% more. 170 vs 128.
- ▲Boost clock — 5.36% more. 2655 MHz vs 2520 MHz.
Why NVIDIA - GeForce RTX 4090 wins
- ▲TDP — 150.00 W less. 450 vs 600.
Spec comparison
Core
| Spec | ASUS - ROG Astral RTX 5090 OC | NVIDIA - GeForce RTX 4090 |
|---|---|---|
| Chipset | GB202 | AD102 |
| Base clockⓘ | 2017 MHz | 2235 MHzlead |
| Boost clockⓘ | 2655 MHzlead | 2520 MHz |
| CUDA / Stream coresⓘ | 21760lead | 16384 |
| Ray tracing coresⓘ | 170lead | 128 |
Memory
| Spec | ASUS - ROG Astral RTX 5090 OC | NVIDIA - GeForce RTX 4090 |
|---|---|---|
| VRAMⓘ | 32 GBlead | 24 GB |
| VRAM typeⓘ | GDDR7lead | GDDR6X |
| Memory busⓘ | 512 bitlead | 384 bit |
Power & Form
| Spec | ASUS - ROG Astral RTX 5090 OC | NVIDIA - GeForce RTX 4090 |
|---|---|---|
| TDPⓘ | 600 W | 450 Wlead |
| Recommended PSUⓘ | 1200 W | 850 Wlead |
| Length | 357 mm | 304 mmlead |
| Slot size | 4-slot | 3-slot |
Benchmarks
| Spec | ASUS - ROG Astral RTX 5090 OC | NVIDIA - GeForce RTX 4090 |
|---|---|---|
| 3DMark Time Spyⓘ | 44000lead | 28000 |
| DLSSⓘ | true | true |
| FSRⓘ | false | false |
Frequently asked
Which has more VRAM, ROG Astral RTX 5090 OC or GeForce RTX 4090?+
ROG Astral RTX 5090 OC ships with 32GB GDDR7 vs 24GB.
Which scores higher in 3DMark Time Spy, ROG Astral RTX 5090 OC or GeForce RTX 4090?+
ROG Astral RTX 5090 OC scores 44000 vs 28000.
Which draws less power, ROG Astral RTX 5090 OC or GeForce RTX 4090?+
GeForce RTX 4090 draws 450W TDP vs 600W.
Spec-level deep dives
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