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 9070 XT |
|---|---|---|
| CUDA / Stream cores | 5376 | 4096 |
| Ray tracing cores | 84 | 64 |
| VRAM | 20 GB | 16 GB |
| Memory bus | 320 bit | 256 bit |
| Boost clock | 2400 MHz | 2970 MHz |
| TDP | 315 W | 304 W |
Between the Radeon RX 7900 XT and Radeon RX 9070 XT, the Radeon RX 7900 XT comes out ahead in cuda / stream cores / ray tracing cores, while the Radeon RX 9070 XT wins on boost clock / tdp. Overall, the Radeon RX 7900 XT scores 67.2 and the Radeon RX 9070 XT scores 67.8 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (67.2 vs 67.8). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the Radeon RX 7900 XT 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, ray tracing cores, vram, among others. The single most decisive one: CUDA / Stream cores — 31.25% more. 5376 vs 4096.
Pick the Radeon RX 9070 XT if you care most about boost clock / tdp. Its strongest claims are boost clock, tdp, 3dmark time spy. The single most decisive one: Boost clock — 23.75% more. 2970 MHz vs 2400 MHz.
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 XT or AMD - Radeon RX 9070 XT?
AMD - Radeon RX 9070 XT leads the current Mars Score by 0.6 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 cuda cores, ray tracing cores, vram gb.
Choose AMD - Radeon RX 9070 XT if…
AMD - Radeon RX 9070 XT has the measurable edge on boost clock mhz, tdp w, 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
- ▲CUDA / Stream cores — 31.25% more. 5376 vs 4096.
- ▲Ray tracing cores — 31.25% more. 84 vs 64.
- ▲VRAM — 25.00% more. 20 GB vs 16 GB.
- ▲Memory bus — 25.00% more. 320 bit vs 256 bit.
Why AMD - Radeon RX 9070 XT wins
- ▲Boost clock — 23.75% more. 2970 MHz vs 2400 MHz.
- ▲TDP — 11.00 W less. 304 vs 315.
- ▲3DMark Time Spy — 2.13% more. 19200 vs 18800.
Spec comparison
Core
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 9070 XT |
|---|---|---|
| Chipset | Navi 31 | Navi 48 |
| Base clockⓘ | 1500 MHz | 2400 MHzlead |
| Boost clockⓘ | 2400 MHz | 2970 MHzlead |
| CUDA / Stream coresⓘ | 5376lead | 4096 |
| Ray tracing coresⓘ | 84lead | 64 |
Memory
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 9070 XT |
|---|---|---|
| VRAMⓘ | 20 GBlead | 16 GB |
| VRAM typeⓘ | GDDR6 | GDDR6 |
| Memory busⓘ | 320 bitlead | 256 bit |
Power & Form
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 9070 XT |
|---|---|---|
| TDPⓘ | 315 W | 304 Wlead |
| Recommended PSUⓘ | 750 W | 750 W |
| Length | 276 mmlead | 287 mm |
| Slot size | 2.5-slot | 2.5-slot |
Benchmarks
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 9070 XT |
|---|---|---|
| 3DMark Time Spyⓘ | 18800 | 19200lead |
| DLSSⓘ | false | false |
| FSRⓘ | true | true |
Frequently asked
Which has more VRAM, Radeon RX 7900 XT or Radeon RX 9070 XT?+
Radeon RX 7900 XT ships with 20GB GDDR6 vs 16GB.
Which scores higher in 3DMark Time Spy, Radeon RX 7900 XT or Radeon RX 9070 XT?+
Radeon RX 9070 XT scores 19200 vs 18800.
Which draws less power, Radeon RX 7900 XT or Radeon RX 9070 XT?+
Radeon RX 9070 XT draws 304W TDP vs 315W.