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 9070 |
|---|---|---|
| TDP | 355 W | 220 W |
| CUDA / Stream cores | 6144 | 3584 |
| Ray tracing cores | 96 | 56 |
| VRAM | 24 GB | 16 GB |
| Memory bus | 384 bit | 256 bit |
| 3DMark Time Spy | 21000 | 16800 |
Between the Radeon RX 7900 XTX and Radeon RX 9070, the Radeon RX 7900 XTX comes out ahead in cuda / stream cores / ray tracing cores, while the Radeon RX 9070 wins on tdp / boost clock. Overall, the Radeon RX 7900 XTX scores 70.5 and the Radeon RX 9070 scores 64.9 on our Mars Score.
Which should you buy?
The Radeon RX 7900 XTX edges ahead on the Mars Score (70.5 vs 64.9), but the 5.6-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 cuda / stream cores, ray tracing cores, vram, among others. The single most decisive one: CUDA / Stream cores — 71.43% more. 6144 vs 3584.
Pick the Radeon RX 9070 if you care most about tdp / boost clock. Its strongest claims are tdp, boost clock. The single most decisive one: TDP — 135.00 W less. 220 vs 355.
Both ship with comparable dlss, so those specs do not separate the two — focus on the differences below.
Bottom line: the Radeon RX 7900 XTX 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 XTX or AMD - Radeon RX 9070?
AMD - Radeon RX 7900 XTX leads the current Mars Score by 5.6 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 XTX if…
AMD - Radeon RX 7900 XTX has the measurable edge on cuda cores, ray tracing cores, vram gb.
Choose AMD - Radeon RX 9070 if…
AMD - Radeon RX 9070 has the measurable edge on tdp w, 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
- ▲CUDA / Stream cores — 71.43% more. 6144 vs 3584.
- ▲Ray tracing cores — 71.43% more. 96 vs 56.
- ▲VRAM — 50.00% more. 24 GB vs 16 GB.
- ▲Memory bus — 50.00% more. 384 bit vs 256 bit.
- ▲3DMark Time Spy — 25.00% more. 21000 vs 16800.
Why AMD - Radeon RX 9070 wins
- ▲TDP — 135.00 W less. 220 vs 355.
- ▲Boost clock — 0.80% more. 2520 MHz vs 2500 MHz.
Spec comparison
Core
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9070 |
|---|---|---|
| Chipset | Navi 31 | Navi 48 |
| Base clockⓘ | 1900 MHz | 2070 MHzlead |
| Boost clockⓘ | 2500 MHz | 2520 MHzlead |
| CUDA / Stream coresⓘ | 6144lead | 3584 |
| Ray tracing coresⓘ | 96lead | 56 |
Memory
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9070 |
|---|---|---|
| VRAMⓘ | 24 GBlead | 16 GB |
| VRAM typeⓘ | GDDR6 | GDDR6 |
| Memory busⓘ | 384 bitlead | 256 bit |
Power & Form
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9070 |
|---|---|---|
| TDPⓘ | 355 W | 220 Wlead |
| Recommended PSUⓘ | 800 W | 650 Wlead |
| Length | 287 mm | 287 mm |
| Slot size | 2.5-slot | 2-slot |
Benchmarks
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9070 |
|---|---|---|
| 3DMark Time Spyⓘ | 21000lead | 16800 |
| DLSSⓘ | false | false |
| FSRⓘ | true | true |
Frequently asked
Which has more VRAM, Radeon RX 7900 XTX or Radeon RX 9070?+
Radeon RX 7900 XTX ships with 24GB GDDR6 vs 16GB.
Which scores higher in 3DMark Time Spy, Radeon RX 7900 XTX or Radeon RX 9070?+
Radeon RX 7900 XTX scores 21000 vs 16800.
Which draws less power, Radeon RX 7900 XTX or Radeon RX 9070?+
Radeon RX 9070 draws 220W TDP vs 355W.