Between the Arc B770 and ROG Astral RTX 5090 OC, the Arc B770 comes out ahead in tdp and boost clock, while the ROG Astral RTX 5090 OC wins on cuda / stream cores and ray tracing cores. Overall, the Arc B770 scores 62.4 and the ROG Astral RTX 5090 OC scores 91.4 on our Mars Score.
Which should you buy?
The ROG Astral RTX 5090 OC is the clear pick on raw spec strength, leading by 29.0 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 B770 if you care most about tdp and boost clock. The biggest gaps in its favor are tdp, boost clock.
Pick the ROG Astral RTX 5090 OC 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 cuda / stream cores, ray tracing cores, 3dmark time spy, among others.
There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.
Bottom line: the ROG Astral RTX 5090 OC is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Intel - Arc B770 wins
- ▲TDP — 375.00 W less. 225 vs 600.
- ▲Boost clock — 9.23% more. 2900 MHz vs 2655 MHz.
Why ASUS - ROG Astral RTX 5090 OC wins
- ▲CUDA / Stream cores — 431.25% more. 21760 vs 4096.
- ▲Ray tracing cores — 431.25% more. 170 vs 32.
- ▲3DMark Time Spy — 225.93% more. 44000 vs 13500.
- ▲VRAM — 100.00% more. 32 GB vs 16 GB.
- ▲Memory bus — 100.00% more. 512 bit vs 256 bit.
- ▲Has DLSS.
Spec comparison
Core
| Spec | Intel - Arc B770 | ASUS - ROG Astral RTX 5090 OC |
|---|---|---|
| Chipset | BMG-G31 | GB202 |
| Base clockⓘ | 2400 MHzlead | 2017 MHz |
| Boost clockⓘ | 2900 MHzlead | 2655 MHz |
| CUDA / Stream coresⓘ | 4096 | 21760lead |
| Ray tracing coresⓘ | 32 | 170lead |
Memory
| Spec | Intel - Arc B770 | ASUS - ROG Astral RTX 5090 OC |
|---|---|---|
| VRAMⓘ | 16 GB | 32 GBlead |
| VRAM typeⓘ | GDDR6 | GDDR7lead |
| Memory busⓘ | 256 bit | 512 bitlead |
Power & Form
| Spec | Intel - Arc B770 | ASUS - ROG Astral RTX 5090 OC |
|---|---|---|
| TDPⓘ | 225 Wlead | 600 W |
| Recommended PSUⓘ | 650 Wlead | 1200 W |
| Length | 280 mmlead | 357 mm |
| Slot size | 2-slot | 4-slot |
Benchmarks
| Spec | Intel - Arc B770 | ASUS - ROG Astral RTX 5090 OC |
|---|---|---|
| 3DMark Time Spyⓘ | 13500 | 44000lead |
| DLSSⓘ | false | truelead |
| FSRⓘ | truelead | false |
Frequently asked
Which has more VRAM, Arc B770 or ROG Astral RTX 5090 OC?+
ROG Astral RTX 5090 OC ships with 32GB GDDR7 vs 16GB.
Which scores higher in 3DMark Time Spy, Arc B770 or ROG Astral RTX 5090 OC?+
ROG Astral RTX 5090 OC scores 44000 vs 13500.
Which draws less power, Arc B770 or ROG Astral RTX 5090 OC?+
Arc B770 draws 225W TDP vs 600W.
Spec-level deep dives
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