ASUS - ROG Astral RTX 5080 OC vs AMD - Radeon RX 7900 XTX
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 | AMD - Radeon RX 7900 XTX |
|---|---|---|
| CUDA / Stream cores | 10752 | 6144 |
| 3DMark Time Spy | 32500 | 21000 |
| VRAM | 16 GB | 24 GB |
| Memory bus | 256 bit | 384 bit |
| Ray tracing cores | 84 | 96 |
| Boost clock | 2655 MHz | 2500 MHz |
Between the ROG Astral RTX 5080 OC and Radeon RX 7900 XTX, the ROG Astral RTX 5080 OC comes out ahead in cuda / stream cores / 3dmark time spy, while the Radeon RX 7900 XTX wins on vram / memory bus. Overall, the ROG Astral RTX 5080 OC scores 77.5 and the Radeon RX 7900 XTX scores 70.5 on our Mars Score.
Which should you buy?
The ROG Astral RTX 5080 OC edges ahead on the Mars Score (77.5 vs 70.5), but the 7.0-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 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 cuda / stream cores, 3dmark time spy, boost clock, among others. The single most decisive one: CUDA / Stream cores — 75.00% more. 10752 vs 6144.
Pick the Radeon RX 7900 XTX if you care most about vram / memory bus. Its strongest claims are vram, memory bus, ray tracing cores, among others. The single most decisive one: VRAM — 50.00% more. 24 GB vs 16 GB.
There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.
Bottom line: the ROG Astral RTX 5080 OC 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 AMD - Radeon RX 7900 XTX?
ASUS - ROG Astral RTX 5080 OC leads the current Mars Score by 7.0 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 cuda cores, timespy score, boost clock mhz.
Choose AMD - Radeon RX 7900 XTX if…
AMD - Radeon RX 7900 XTX has the measurable edge on vram gb, memory bus bit, ray tracing cores.
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
- ▲CUDA / Stream cores — 75.00% more. 10752 vs 6144.
- ▲3DMark Time Spy — 54.76% more. 32500 vs 21000.
- ▲Boost clock — 6.20% more. 2655 MHz vs 2500 MHz.
- ▲Has DLSS.
Why AMD - Radeon RX 7900 XTX wins
- ▲VRAM — 50.00% more. 24 GB vs 16 GB.
- ▲Memory bus — 50.00% more. 384 bit vs 256 bit.
- ▲Ray tracing cores — 14.29% more. 96 vs 84.
- ▲TDP — 5.00 W less. 355 vs 360.
Spec comparison
Core
| Spec | ASUS - ROG Astral RTX 5080 OC | AMD - Radeon RX 7900 XTX |
|---|---|---|
| Chipset | GB203 | Navi 31 |
| Base clockⓘ | 2295 MHzlead | 1900 MHz |
| Boost clockⓘ | 2655 MHzlead | 2500 MHz |
| CUDA / Stream coresⓘ | 10752lead | 6144 |
| Ray tracing coresⓘ | 84 | 96lead |
Memory
| Spec | ASUS - ROG Astral RTX 5080 OC | AMD - Radeon RX 7900 XTX |
|---|---|---|
| VRAMⓘ | 16 GB | 24 GBlead |
| VRAM typeⓘ | GDDR7lead | GDDR6 |
| Memory busⓘ | 256 bit | 384 bitlead |
Power & Form
| Spec | ASUS - ROG Astral RTX 5080 OC | AMD - Radeon RX 7900 XTX |
|---|---|---|
| TDPⓘ | 360 W | 355 Wlead |
| Recommended PSUⓘ | 850 W | 800 Wlead |
| Length | 357 mm | 287 mmlead |
| Slot size | 3.5-slot | 2.5-slot |
Benchmarks
| Spec | ASUS - ROG Astral RTX 5080 OC | AMD - Radeon RX 7900 XTX |
|---|---|---|
| 3DMark Time Spyⓘ | 32500lead | 21000 |
| DLSSⓘ | truelead | false |
| FSRⓘ | false | truelead |
Frequently asked
Which has more VRAM, ROG Astral RTX 5080 OC or Radeon RX 7900 XTX?+
Radeon RX 7900 XTX ships with 24GB GDDR6 vs 16GB.
Which scores higher in 3DMark Time Spy, ROG Astral RTX 5080 OC or Radeon RX 7900 XTX?+
ROG Astral RTX 5080 OC scores 32500 vs 21000.
Which draws less power, ROG Astral RTX 5080 OC or Radeon RX 7900 XTX?+
Radeon RX 7900 XTX draws 355W TDP vs 360W.