NVIDIA - GeForce RTX 4080 SUPER vs AMD - Radeon RX 7900 XT
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | NVIDIA - GeForce RTX 4080 SUPER | AMD - Radeon RX 7900 XT |
|---|---|---|
| CUDA / Stream cores | 10240 | 5376 |
| VRAM | 16 GB | 20 GB |
| Memory bus | 256 bit | 320 bit |
| 3DMark Time Spy | 21500 | 18800 |
| Boost clock | 2550 MHz | 2400 MHz |
| TDP | 320 W | 315 W |
Between the GeForce RTX 4080 SUPER and Radeon RX 7900 XT, the GeForce RTX 4080 SUPER comes out ahead in cuda / stream cores / 3dmark time spy, while the Radeon RX 7900 XT wins on vram / memory bus. Overall, the GeForce RTX 4080 SUPER scores 69.7 and the Radeon RX 7900 XT scores 67.2 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (69.7 vs 67.2). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the GeForce RTX 4080 SUPER 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, 3dmark time spy, boost clock, among others. The single most decisive one: CUDA / Stream cores — 90.48% more. 10240 vs 5376.
Pick the Radeon RX 7900 XT if you care most about vram / memory bus. Its strongest claims are vram, memory bus, tdp, among others. The single most decisive one: VRAM — 25.00% more. 20 GB vs 16 GB.
There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.
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: NVIDIA - GeForce RTX 4080 SUPER or AMD - Radeon RX 7900 XT?
NVIDIA - GeForce RTX 4080 SUPER leads the current Mars Score by 2.5 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 NVIDIA - GeForce RTX 4080 SUPER if…
NVIDIA - GeForce RTX 4080 SUPER has the measurable edge on cuda cores, timespy score, boost clock mhz.
Choose AMD - Radeon RX 7900 XT if…
AMD - Radeon RX 7900 XT has the measurable edge on vram gb, memory bus bit, tdp w.
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 NVIDIA - GeForce RTX 4080 SUPER wins
- ▲CUDA / Stream cores — 90.48% more. 10240 vs 5376.
- ▲3DMark Time Spy — 14.36% more. 21500 vs 18800.
- ▲Boost clock — 6.25% more. 2550 MHz vs 2400 MHz.
- ▲Has DLSS.
Why AMD - Radeon RX 7900 XT wins
- ▲VRAM — 25.00% more. 20 GB vs 16 GB.
- ▲Memory bus — 25.00% more. 320 bit vs 256 bit.
- ▲TDP — 5.00 W less. 315 vs 320.
- ▲Ray tracing cores — 5.00% more. 84 vs 80.
Spec comparison
Core
| Spec | NVIDIA - GeForce RTX 4080 SUPER | AMD - Radeon RX 7900 XT |
|---|---|---|
| Chipset | AD103 | Navi 31 |
| Base clockⓘ | 2295 MHzlead | 1500 MHz |
| Boost clockⓘ | 2550 MHzlead | 2400 MHz |
| CUDA / Stream coresⓘ | 10240lead | 5376 |
| Ray tracing coresⓘ | 80 | 84lead |
Memory
| Spec | NVIDIA - GeForce RTX 4080 SUPER | AMD - Radeon RX 7900 XT |
|---|---|---|
| VRAMⓘ | 16 GB | 20 GBlead |
| VRAM typeⓘ | GDDR6Xlead | GDDR6 |
| Memory busⓘ | 256 bit | 320 bitlead |
Power & Form
| Spec | NVIDIA - GeForce RTX 4080 SUPER | AMD - Radeon RX 7900 XT |
|---|---|---|
| TDPⓘ | 320 W | 315 Wlead |
| Recommended PSUⓘ | 750 W | 750 W |
| Length | 304 mm | 276 mmlead |
| Slot size | 3-slot | 2.5-slot |
Benchmarks
| Spec | NVIDIA - GeForce RTX 4080 SUPER | AMD - Radeon RX 7900 XT |
|---|---|---|
| 3DMark Time Spyⓘ | 21500lead | 18800 |
| DLSSⓘ | truelead | false |
| FSRⓘ | false | truelead |
Frequently asked
Which has more VRAM, GeForce RTX 4080 SUPER or Radeon RX 7900 XT?+
Radeon RX 7900 XT ships with 20GB GDDR6 vs 16GB.
Which scores higher in 3DMark Time Spy, GeForce RTX 4080 SUPER or Radeon RX 7900 XT?+
GeForce RTX 4080 SUPER scores 21500 vs 18800.
Which draws less power, GeForce RTX 4080 SUPER or Radeon RX 7900 XT?+
Radeon RX 7900 XT draws 315W TDP vs 320W.