Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Intel - Arc B580 | AMD - Radeon RX 7900 XT |
|---|---|---|
| Ray tracing cores | 20 | 84 |
| TDP | 190 W | 315 W |
| CUDA / Stream cores | 2560 | 5376 |
| 3DMark Time Spy | 9400 | 18800 |
| VRAM | 12 GB | 20 GB |
| Memory bus | 192 bit | 320 bit |
Between the Arc B580 and Radeon RX 7900 XT, the Arc B580 comes out ahead in tdp / boost clock, while the Radeon RX 7900 XT wins on ray tracing cores / cuda / stream cores. Overall, the Arc B580 scores 59.2 and the Radeon RX 7900 XT scores 67.2 on our Mars Score.
Which should you buy?
The Radeon RX 7900 XT is the clear pick on raw spec strength, leading by 8.0 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Arc B580 if you care most about tdp / boost clock. The biggest gaps in its favor are tdp, boost clock. The single most decisive one: TDP — 125.00 W less. 190 vs 315.
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. Its strongest claims are ray tracing cores, cuda / stream cores, 3dmark time spy, among others. The single most decisive one: Ray tracing cores — 320.00% more. 84 vs 20.
Both ship with comparable dlss, so those specs do not separate the two — focus on the differences below.
Bottom line: the Radeon RX 7900 XT 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: Intel - Arc B580 or AMD - Radeon RX 7900 XT?
AMD - Radeon RX 7900 XT leads the current Mars Score by 8.0 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 Intel - Arc B580 if…
Intel - Arc B580 has the measurable edge on tdp w, boost clock mhz.
Choose AMD - Radeon RX 7900 XT if…
AMD - Radeon RX 7900 XT has the measurable edge on ray tracing cores, cuda cores, 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 Intel - Arc B580 wins
- ▲TDP — 125.00 W less. 190 vs 315.
- ▲Boost clock — 18.75% more. 2850 MHz vs 2400 MHz.
Why AMD - Radeon RX 7900 XT wins
- ▲Ray tracing cores — 320.00% more. 84 vs 20.
- ▲CUDA / Stream cores — 110.00% more. 5376 vs 2560.
- ▲3DMark Time Spy — 100.00% more. 18800 vs 9400.
- ▲VRAM — 66.67% more. 20 GB vs 12 GB.
- ▲Memory bus — 66.67% more. 320 bit vs 192 bit.
Spec comparison
Core
| Spec | Intel - Arc B580 | AMD - Radeon RX 7900 XT |
|---|---|---|
| Chipset | BMG-G21 | Navi 31 |
| Base clockⓘ | 2670 MHzlead | 1500 MHz |
| Boost clockⓘ | 2850 MHzlead | 2400 MHz |
| CUDA / Stream coresⓘ | 2560 | 5376lead |
| Ray tracing coresⓘ | 20 | 84lead |
Memory
| Spec | Intel - Arc B580 | AMD - Radeon RX 7900 XT |
|---|---|---|
| VRAMⓘ | 12 GB | 20 GBlead |
| VRAM typeⓘ | GDDR6 | GDDR6 |
| Memory busⓘ | 192 bit | 320 bitlead |
Power & Form
| Spec | Intel - Arc B580 | AMD - Radeon RX 7900 XT |
|---|---|---|
| TDPⓘ | 190 Wlead | 315 W |
| Recommended PSUⓘ | 600 Wlead | 750 W |
| Length | 272 mmlead | 276 mm |
| Slot size | 2-slot | 2.5-slot |
Benchmarks
| Spec | Intel - Arc B580 | AMD - Radeon RX 7900 XT |
|---|---|---|
| 3DMark Time Spyⓘ | 9400 | 18800lead |
| DLSSⓘ | false | false |
| FSRⓘ | true | true |
Frequently asked
Which has more VRAM, Arc B580 or Radeon RX 7900 XT?+
Radeon RX 7900 XT ships with 20GB GDDR6 vs 12GB.
Which scores higher in 3DMark Time Spy, Arc B580 or Radeon RX 7900 XT?+
Radeon RX 7900 XT scores 18800 vs 9400.
Which draws less power, Arc B580 or Radeon RX 7900 XT?+
Arc B580 draws 190W TDP vs 315W.