Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9080 |
|---|---|---|
| TDP | 355 W | 290 W |
| 3DMark Time Spy | 21000 | 25500 |
| VRAM | 24 GB | 20 GB |
| Memory bus | 384 bit | 320 bit |
| Boost clock | 2500 MHz | 2950 MHz |
| CUDA / Stream cores | 6144 | 7168 |
Between the Radeon RX 7900 XTX and Radeon RX 9080, the Radeon RX 7900 XTX comes out ahead in vram / memory bus, while the Radeon RX 9080 wins on tdp / 3dmark time spy. Overall, the Radeon RX 7900 XTX scores 70.5 and the Radeon RX 9080 scores 74.9 on our Mars Score.
Which should you buy?
The Radeon RX 9080 edges ahead on the Mars Score (70.5 vs 74.9), but the 4.4-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Radeon RX 7900 XTX 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 vram, memory bus. The single most decisive one: VRAM — 20.00% more. 24 GB vs 20 GB.
Pick the Radeon RX 9080 if you care most about tdp / 3dmark time spy. Its strongest claims are tdp, 3dmark time spy, boost clock, among others. The single most decisive one: TDP — 65.00 W less. 290 vs 355.
Both ship with comparable dlss, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: AMD - Radeon RX 7900 XTX or AMD - Radeon RX 9080?
AMD - Radeon RX 9080 leads the current Mars Score by 4.4 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 XTX if…
AMD - Radeon RX 7900 XTX has the measurable edge on vram gb, memory bus bit.
Choose AMD - Radeon RX 9080 if…
AMD - Radeon RX 9080 has the measurable edge on tdp w, timespy score, boost clock mhz.
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 XTX wins
- ▲VRAM — 20.00% more. 24 GB vs 20 GB.
- ▲Memory bus — 20.00% more. 384 bit vs 320 bit.
Why AMD - Radeon RX 9080 wins
- ▲TDP — 65.00 W less. 290 vs 355.
- ▲3DMark Time Spy — 21.43% more. 25500 vs 21000.
- ▲Boost clock — 18.00% more. 2950 MHz vs 2500 MHz.
- ▲CUDA / Stream cores — 16.67% more. 7168 vs 6144.
- ▲Ray tracing cores — 16.67% more. 112 vs 96.
Spec comparison
Core
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9080 |
|---|---|---|
| Chipset | Navi 31 | Navi 48 |
| Base clockⓘ | 1900 MHz | 2000 MHzlead |
| Boost clockⓘ | 2500 MHz | 2950 MHzlead |
| CUDA / Stream coresⓘ | 6144 | 7168lead |
| Ray tracing coresⓘ | 96 | 112lead |
Memory
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9080 |
|---|---|---|
| VRAMⓘ | 24 GBlead | 20 GB |
| VRAM typeⓘ | GDDR6 | GDDR7lead |
| Memory busⓘ | 384 bitlead | 320 bit |
Power & Form
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9080 |
|---|---|---|
| TDPⓘ | 355 W | 290 Wlead |
| Recommended PSUⓘ | 800 W | 800 W |
| Length | 287 mmlead | 310 mm |
| Slot size | 2.5-slot | 3-slot |
Benchmarks
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9080 |
|---|---|---|
| 3DMark Time Spyⓘ | 21000 | 25500lead |
| DLSSⓘ | false | false |
| FSRⓘ | true | true |
Frequently asked
Which has more VRAM, Radeon RX 7900 XTX or Radeon RX 9080?+
Radeon RX 7900 XTX ships with 24GB GDDR6 vs 20GB.
Which scores higher in 3DMark Time Spy, Radeon RX 7900 XTX or Radeon RX 9080?+
Radeon RX 9080 scores 25500 vs 21000.
Which draws less power, Radeon RX 7900 XTX or Radeon RX 9080?+
Radeon RX 9080 draws 290W TDP vs 355W.