Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 9080 XT |
|---|---|---|
| CUDA / Stream cores | 5376 | 8192 |
| Ray tracing cores | 84 | 128 |
| 3DMark Time Spy | 18800 | 28500 |
| Boost clock | 2400 MHz | 3100 MHz |
| VRAM | 20 GB | 24 GB |
| Memory bus | 320 bit | 384 bit |
Between the Radeon RX 7900 XT and Radeon RX 9080 XT, the Radeon RX 7900 XT comes out ahead in tdp, while the Radeon RX 9080 XT wins on cuda / stream cores / ray tracing cores. Overall, the Radeon RX 7900 XT scores 67.2 and the Radeon RX 9080 XT scores 79 on our Mars Score.
Which should you buy?
The Radeon RX 9080 XT is the clear pick on raw spec strength, leading by 11.8 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 Radeon RX 7900 XT if you care most about tdp. The biggest gaps in its favor are tdp. The single most decisive one: TDP — 15.00 W less. 315 vs 330.
Pick the Radeon RX 9080 XT 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, 3dmark time spy, among others. The single most decisive one: CUDA / Stream cores — 52.38% more. 8192 vs 5376.
Both ship with comparable dlss, so those specs do not separate the two — focus on the differences below.
Bottom line: the Radeon RX 9080 XT 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: AMD - Radeon RX 7900 XT or AMD - Radeon RX 9080 XT?
AMD - Radeon RX 9080 XT leads the current Mars Score by 11.8 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 AMD - Radeon RX 7900 XT if…
AMD - Radeon RX 7900 XT has the measurable edge on tdp w.
Choose AMD - Radeon RX 9080 XT if…
AMD - Radeon RX 9080 XT has the measurable edge on cuda cores, ray tracing cores, timespy score.
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 AMD - Radeon RX 7900 XT wins
- ▲TDP — 15.00 W less. 315 vs 330.
Why AMD - Radeon RX 9080 XT wins
- ▲CUDA / Stream cores — 52.38% more. 8192 vs 5376.
- ▲Ray tracing cores — 52.38% more. 128 vs 84.
- ▲3DMark Time Spy — 51.60% more. 28500 vs 18800.
- ▲Boost clock — 29.17% more. 3100 MHz vs 2400 MHz.
- ▲VRAM — 20.00% more. 24 GB vs 20 GB.
- ▲Memory bus — 20.00% more. 384 bit vs 320 bit.
Spec comparison
Core
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 9080 XT |
|---|---|---|
| Chipset | Navi 31 | Navi 48 |
| Base clockⓘ | 1500 MHz | 2100 MHzlead |
| Boost clockⓘ | 2400 MHz | 3100 MHzlead |
| CUDA / Stream coresⓘ | 5376 | 8192lead |
| Ray tracing coresⓘ | 84 | 128lead |
Memory
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 9080 XT |
|---|---|---|
| VRAMⓘ | 20 GB | 24 GBlead |
| VRAM typeⓘ | GDDR6 | GDDR7lead |
| Memory busⓘ | 320 bit | 384 bitlead |
Power & Form
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 9080 XT |
|---|---|---|
| TDPⓘ | 315 Wlead | 330 W |
| Recommended PSUⓘ | 750 Wlead | 850 W |
| Length | 276 mmlead | 320 mm |
| Slot size | 2.5-slot | 3-slot |
Benchmarks
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 9080 XT |
|---|---|---|
| 3DMark Time Spyⓘ | 18800 | 28500lead |
| DLSSⓘ | false | false |
| FSRⓘ | true | true |
Frequently asked
Which has more VRAM, Radeon RX 7900 XT or Radeon RX 9080 XT?+
Radeon RX 9080 XT ships with 24GB GDDR7 vs 20GB.
Which scores higher in 3DMark Time Spy, Radeon RX 7900 XT or Radeon RX 9080 XT?+
Radeon RX 9080 XT scores 28500 vs 18800.
Which draws less power, Radeon RX 7900 XT or Radeon RX 9080 XT?+
Radeon RX 7900 XT draws 315W TDP vs 330W.