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 XT |
|---|---|---|
| TDP | 355 W | 304 W |
| VRAM | 24 GB | 16 GB |
| CUDA / Stream cores | 6144 | 4096 |
| Memory bus | 384 bit | 256 bit |
| Ray tracing cores | 96 | 64 |
| Boost clock | 2500 MHz | 2970 MHz |
Between the Radeon RX 7900 XTX and Radeon RX 9070 XT, the Radeon RX 7900 XTX comes out ahead in vram / cuda / stream cores, while the Radeon RX 9070 XT wins on tdp / boost clock. Overall, the Radeon RX 7900 XTX scores 70.5 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 (70.5 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 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, cuda / stream cores, memory bus, among others. The single most decisive one: VRAM — 50.00% more. 24 GB vs 16 GB.
Pick the Radeon RX 9070 XT if you care most about tdp / boost clock. Its strongest claims are tdp, boost clock. The single most decisive one: TDP — 51.00 W less. 304 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 9070 XT?
AMD - Radeon RX 7900 XTX leads the current Mars Score by 2.7 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, cuda cores, memory bus bit.
Choose AMD - Radeon RX 9070 XT if…
AMD - Radeon RX 9070 XT 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
- ▲VRAM — 50.00% more. 24 GB vs 16 GB.
- ▲CUDA / Stream cores — 50.00% more. 6144 vs 4096.
- ▲Memory bus — 50.00% more. 384 bit vs 256 bit.
- ▲Ray tracing cores — 50.00% more. 96 vs 64.
- ▲3DMark Time Spy — 9.38% more. 21000 vs 19200.
Why AMD - Radeon RX 9070 XT wins
- ▲TDP — 51.00 W less. 304 vs 355.
- ▲Boost clock — 18.80% more. 2970 MHz vs 2500 MHz.
Spec comparison
Core
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9070 XT |
|---|---|---|
| Chipset | Navi 31 | Navi 48 |
| Base clockⓘ | 1900 MHz | 2400 MHzlead |
| Boost clockⓘ | 2500 MHz | 2970 MHzlead |
| CUDA / Stream coresⓘ | 6144lead | 4096 |
| Ray tracing coresⓘ | 96lead | 64 |
Memory
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9070 XT |
|---|---|---|
| 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 XT |
|---|---|---|
| TDPⓘ | 355 W | 304 Wlead |
| Recommended PSUⓘ | 800 W | 750 Wlead |
| Length | 287 mm | 287 mm |
| Slot size | 2.5-slot | 2.5-slot |
Benchmarks
| Spec | AMD - Radeon RX 7900 XTX | AMD - Radeon RX 9070 XT |
|---|---|---|
| 3DMark Time Spyⓘ | 21000lead | 19200 |
| DLSSⓘ | false | false |
| FSRⓘ | true | true |
Frequently asked
Which has more VRAM, Radeon RX 7900 XTX or Radeon RX 9070 XT?+
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 XT?+
Radeon RX 7900 XTX scores 21000 vs 19200.
Which draws less power, Radeon RX 7900 XTX or Radeon RX 9070 XT?+
Radeon RX 9070 XT draws 304W TDP vs 355W.