Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Intel - Arc B770 | AMD - Radeon RX 7900 XT |
|---|---|---|
| Ray tracing cores | 32 | 84 |
| TDP | 225 W | 315 W |
| 3DMark Time Spy | 13500 | 18800 |
| CUDA / Stream cores | 4096 | 5376 |
| VRAM | 16 GB | 20 GB |
| Memory bus | 256 bit | 320 bit |
Between the Arc B770 and Radeon RX 7900 XT, the Arc B770 comes out ahead in tdp / boost clock, while the Radeon RX 7900 XT wins on ray tracing cores / 3dmark time spy. Overall, the Arc B770 scores 64.2 and the Radeon RX 7900 XT scores 67.2 on our Mars Score.
Which should you buy?
The Radeon RX 7900 XT edges ahead on the Mars Score (64.2 vs 67.2), but the 3.0-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Arc B770 if you care most about tdp / boost clock. The biggest gaps in its favor are tdp, boost clock. The single most decisive one: TDP — 90.00 W less. 225 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, 3dmark time spy, cuda / stream cores, among others. The single most decisive one: Ray tracing cores — 162.50% more. 84 vs 32.
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: Intel - Arc B770 or AMD - Radeon RX 7900 XT?
AMD - Radeon RX 7900 XT leads the current Mars Score by 3.0 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 B770 if…
Intel - Arc B770 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, timespy score, 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 Intel - Arc B770 wins
- ▲TDP — 90.00 W less. 225 vs 315.
- ▲Boost clock — 20.83% more. 2900 MHz vs 2400 MHz.
Why AMD - Radeon RX 7900 XT wins
- ▲Ray tracing cores — 162.50% more. 84 vs 32.
- ▲3DMark Time Spy — 39.26% more. 18800 vs 13500.
- ▲CUDA / Stream cores — 31.25% more. 5376 vs 4096.
- ▲VRAM — 25.00% more. 20 GB vs 16 GB.
- ▲Memory bus — 25.00% more. 320 bit vs 256 bit.
Spec comparison
Core
| Spec | Intel - Arc B770 | AMD - Radeon RX 7900 XT |
|---|---|---|
| Chipset | BMG-G31 | Navi 31 |
| Base clockⓘ | 2400 MHzlead | 1500 MHz |
| Boost clockⓘ | 2900 MHzlead | 2400 MHz |
| CUDA / Stream coresⓘ | 4096 | 5376lead |
| Ray tracing coresⓘ | 32 | 84lead |
Memory
| Spec | Intel - Arc B770 | AMD - Radeon RX 7900 XT |
|---|---|---|
| VRAMⓘ | 16 GB | 20 GBlead |
| VRAM typeⓘ | GDDR6 | GDDR6 |
| Memory busⓘ | 256 bit | 320 bitlead |
Power & Form
| Spec | Intel - Arc B770 | AMD - Radeon RX 7900 XT |
|---|---|---|
| TDPⓘ | 225 Wlead | 315 W |
| Recommended PSUⓘ | 650 Wlead | 750 W |
| Length | 280 mm | 276 mmlead |
| Slot size | 2-slot | 2.5-slot |
Benchmarks
| Spec | Intel - Arc B770 | AMD - Radeon RX 7900 XT |
|---|---|---|
| 3DMark Time Spyⓘ | 13500 | 18800lead |
| DLSSⓘ | false | false |
| FSRⓘ | true | true |
Frequently asked
Which has more VRAM, Arc B770 or Radeon RX 7900 XT?+
Radeon RX 7900 XT ships with 20GB GDDR6 vs 16GB.
Which scores higher in 3DMark Time Spy, Arc B770 or Radeon RX 7900 XT?+
Radeon RX 7900 XT scores 18800 vs 13500.
Which draws less power, Arc B770 or Radeon RX 7900 XT?+
Arc B770 draws 225W TDP vs 315W.