Arc A770 vs Arc B580
On raw speed the Arc B580 comes out ahead: meaningfully ahead, about 10% ahead of the Arc A770. That said, the Arc A770 is the smarter buy on value — $100 USD less for the performance on offer.
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Arc B580 vs Arc A770: In-Depth Breakdown
Performance: Arc B580 vs Arc A770
The Arc B580 is noticeably faster, around 10% ahead of the Arc A770. Both cards sit in the same broad class, well suited to 1080p.
Price & Value
The Arc A770 currently lists from $160 USD, $100 USD less than the Arc B580 at $260 USD. Despite being slower, the Arc A770 offers the better performance-per-dollar (~48% better value), so budget-focused buyers should weigh it carefully. The Arc A770 is trading below its $329 USD MSRP — a genuine deal.
Power & Efficiency
At 190W against 225W, the Arc B580 is both the lower-power and the more efficient card, making it the easier build to cool and power. Its more modern Battlemage architecture on a TSMC N5 process is part of why it does more with each watt.
VRAM & Future-Proofing
VRAM favors the Arc A770 at 16GB versus 12GB on the Arc B580 — that extra 4GB matters most at 4K, with high-res texture packs, and for content-creation/local-AI work. The Arc A770's memory is also faster — 560 GB/s versus 456 GB/s (256-bit vs 192-bit bus) — which helps feed the GPU at 4K and with heavy textures.
Generation & Longevity
The Arc B580 is roughly 2 years newer than the Arc A770 (Battlemage vs Alchemist), so it generally benefits from a more modern architecture and longer driver-support runway.
Which should you buy: Arc A770 or Arc B580?
Choose the Arc B580 if you want the most performance and can absorb the higher price. If you're optimizing for value, the Arc A770 stretches your money further for only slightly lower performance.
Frequently Asked Questions
Is the Arc B580 better than the Arc A770?
Which is better for 4K gaming, the Arc A770 or the Arc B580?
Is the Arc B580 worth the extra $100 USD over the Arc A770?
Does the Arc A770 have enough VRAM advantage to matter?
Which should you buy: Arc A770 or Arc B580?
Technical Specifications Comparison
Architecture & Cores
| Specification | Arc A770 | Arc B580 |
|---|---|---|
| Architecture | Alchemist | Battlemage |
| Process Node | TSMC N6 | TSMC N5 |
| CUDA Cores (Shading Units / Shading Units) | 4,096✓ | 2,560 |
| Ray Tracing Cores | 32✓ | 20 |
| Tensor / AI Cores | 512✓ | 160 |
Clock Speeds
| Specification | Arc A770 | Arc B580 |
|---|---|---|
| Base Clock | 2,100 MHz | 2,670 MHz✓ |
| Boost Clock | 2,400 MHz | 2,850 MHz✓ |
Memory
| Specification | Arc A770 | Arc B580 |
|---|---|---|
| VRAM Capacity | 16 GB✓ | 12 GB |
| Memory Type | GDDR6 | GDDR6 |
| Memory Bus | 256-bit✓ | 192-bit |
| Memory Speed | 17.5 Gbps | 19 Gbps✓ |
| Bandwidth | 560 GB/s✓ | 456 GB/s |
Connectivity & Power
| Specification | Arc A770 | Arc B580 |
|---|---|---|
| Interface | PCIe 4.0 x16 | PCIe 4.0 x8 |
| TDP | 225 W | 190 W✓ |
| Power Connectors | 2x 8-pin | 1x 8-pin |
| Released | Oct 2022 | Dec 2024 |
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