ASUS - ROG Astral RTX 5080 OC vs NVIDIA - GeForce RTX 5090
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | ASUS - ROG Astral RTX 5080 OC | NVIDIA - GeForce RTX 5090 |
|---|---|---|
| TDP | 360 W | 575 W |
| CUDA / Stream cores | 10752 | 21760 |
| Ray tracing cores | 84 | 170 |
| VRAM | 16 GB | 32 GB |
| Memory bus | 256 bit | 512 bit |
| Boost clock | 2655 MHz | 2407 MHz |
Between the ROG Astral RTX 5080 OC and GeForce RTX 5090, the ROG Astral RTX 5080 OC comes out ahead in tdp / boost clock, while the GeForce RTX 5090 wins on cuda / stream cores / ray tracing cores. Overall, the ROG Astral RTX 5080 OC scores 77.5 and the GeForce RTX 5090 scores 84.2 on our Mars Score.
Which should you buy?
The GeForce RTX 5090 edges ahead on the Mars Score (77.5 vs 84.2), but the 6.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the ROG Astral RTX 5080 OC if you care most about tdp / boost clock. The biggest gaps in its favor are tdp, boost clock. The single most decisive one: TDP — 215.00 W less. 360 vs 575.
Pick the GeForce RTX 5090 if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. Its strongest claims are cuda / stream cores, ray tracing cores, vram, among others. The single most decisive one: CUDA / Stream cores — 102.38% more. 21760 vs 10752.
Both ship with comparable 3dmark time spy, dlss, so those specs do not separate the two — focus on the differences below.
Bottom line: the GeForce RTX 5090 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: ASUS - ROG Astral RTX 5080 OC or NVIDIA - GeForce RTX 5090?
NVIDIA - GeForce RTX 5090 leads the current Mars Score by 6.7 points.The more useful decision is the trade-off behind that result: compare vram, cuda / stream cores, boost clock, tdp against the way you will actually use the product.
Choose ASUS - ROG Astral RTX 5080 OC if…
ASUS - ROG Astral RTX 5080 OC has the measurable edge on tdp w, boost clock mhz.
Choose NVIDIA - GeForce RTX 5090 if…
NVIDIA - GeForce RTX 5090 has the measurable edge on cuda cores, ray tracing cores, vram gb.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why ASUS - ROG Astral RTX 5080 OC wins
- ▲TDP — 215.00 W less. 360 vs 575.
- ▲Boost clock — 10.30% more. 2655 MHz vs 2407 MHz.
Why NVIDIA - GeForce RTX 5090 wins
- ▲CUDA / Stream cores — 102.38% more. 21760 vs 10752.
- ▲Ray tracing cores — 102.38% more. 170 vs 84.
- ▲VRAM — 100.00% more. 32 GB vs 16 GB.
- ▲Memory bus — 100.00% more. 512 bit vs 256 bit.
Spec comparison
Core
| Spec | ASUS - ROG Astral RTX 5080 OC | NVIDIA - GeForce RTX 5090 |
|---|---|---|
| Chipset | GB203 | GB202 |
| Base clockⓘ | 2295 MHzlead | 2017 MHz |
| Boost clockⓘ | 2655 MHzlead | 2407 MHz |
| CUDA / Stream coresⓘ | 10752 | 21760lead |
| Ray tracing coresⓘ | 84 | 170lead |
Memory
| Spec | ASUS - ROG Astral RTX 5080 OC | NVIDIA - GeForce RTX 5090 |
|---|---|---|
| VRAMⓘ | 16 GB | 32 GBlead |
| VRAM typeⓘ | GDDR7 | GDDR7 |
| Memory busⓘ | 256 bit | 512 bitlead |
Power & Form
| Spec | ASUS - ROG Astral RTX 5080 OC | NVIDIA - GeForce RTX 5090 |
|---|---|---|
| TDPⓘ | 360 Wlead | 575 W |
| Recommended PSUⓘ | 850 Wlead | 1000 W |
| Length | 357 mm | 304 mmlead |
| Slot size | 3.5-slot | 2-slot |
Benchmarks
| Spec | ASUS - ROG Astral RTX 5080 OC | NVIDIA - GeForce RTX 5090 |
|---|---|---|
| 3DMark Time Spyⓘ | 32500 | 32500 |
| DLSSⓘ | true | true |
| FSRⓘ | false | false |
Frequently asked
Which has more VRAM, ROG Astral RTX 5080 OC or GeForce RTX 5090?+
GeForce RTX 5090 ships with 32GB GDDR7 vs 16GB.
Which scores higher in 3DMark Time Spy, ROG Astral RTX 5080 OC or GeForce RTX 5090?+
GeForce RTX 5090 scores 32500 vs 32500.
Which draws less power, ROG Astral RTX 5080 OC or GeForce RTX 5090?+
ROG Astral RTX 5080 OC draws 360W TDP vs 575W.