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 7900 XTX |
|---|---|---|
| TDP | 315 W | 355 W |
| VRAM | 20 GB | 24 GB |
| Memory bus | 320 bit | 384 bit |
| CUDA / Stream cores | 5376 | 6144 |
| Ray tracing cores | 84 | 96 |
| 3DMark Time Spy | 18800 | 21000 |
Between the Radeon RX 7900 XT and Radeon RX 7900 XTX, the Radeon RX 7900 XT comes out ahead in tdp, while the Radeon RX 7900 XTX wins on vram / memory bus. Overall, the Radeon RX 7900 XT scores 67.2 and the Radeon RX 7900 XTX scores 70.5 on our Mars Score.
Which should you buy?
The Radeon RX 7900 XTX edges ahead on the Mars Score (67.2 vs 70.5), but the 3.3-point gap is small enough that the right pick comes down to which spec advantages matter to you.
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 — 40.00 W less. 315 vs 355.
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. Its strongest claims are vram, memory bus, cuda / stream cores, among others. The single most decisive one: VRAM — 20.00% more. 24 GB vs 20 GB.
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 7900 XTX?
AMD - Radeon RX 7900 XTX leads the current Mars Score by 3.3 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 7900 XTX if…
AMD - Radeon RX 7900 XTX has the measurable edge on vram gb, memory bus bit, cuda cores.
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 — 40.00 W less. 315 vs 355.
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.
- ▲CUDA / Stream cores — 14.29% more. 6144 vs 5376.
- ▲Ray tracing cores — 14.29% more. 96 vs 84.
- ▲3DMark Time Spy — 11.70% more. 21000 vs 18800.
- ▲Boost clock — 4.17% more. 2500 MHz vs 2400 MHz.
Spec comparison
Core
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 7900 XTX |
|---|---|---|
| Chipset | Navi 31 | Navi 31 |
| Base clockⓘ | 1500 MHz | 1900 MHzlead |
| Boost clockⓘ | 2400 MHz | 2500 MHzlead |
| CUDA / Stream coresⓘ | 5376 | 6144lead |
| Ray tracing coresⓘ | 84 | 96lead |
Memory
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 7900 XTX |
|---|---|---|
| VRAMⓘ | 20 GB | 24 GBlead |
| VRAM typeⓘ | GDDR6 | GDDR6 |
| Memory busⓘ | 320 bit | 384 bitlead |
Power & Form
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 7900 XTX |
|---|---|---|
| TDPⓘ | 315 Wlead | 355 W |
| Recommended PSUⓘ | 750 Wlead | 800 W |
| Length | 276 mmlead | 287 mm |
| Slot size | 2.5-slot | 2.5-slot |
Benchmarks
| Spec | AMD - Radeon RX 7900 XT | AMD - Radeon RX 7900 XTX |
|---|---|---|
| 3DMark Time Spyⓘ | 18800 | 21000lead |
| DLSSⓘ | false | false |
| FSRⓘ | true | true |
Frequently asked
Which has more VRAM, Radeon RX 7900 XT or Radeon RX 7900 XTX?+
Radeon RX 7900 XTX ships with 24GB GDDR6 vs 20GB.
Which scores higher in 3DMark Time Spy, Radeon RX 7900 XT or Radeon RX 7900 XTX?+
Radeon RX 7900 XTX scores 21000 vs 18800.
Which draws less power, Radeon RX 7900 XT or Radeon RX 7900 XTX?+
Radeon RX 7900 XT draws 315W TDP vs 355W.