Arc B580 vs Radeon RX 6800
Performance-wise the Radeon RX 6800 is out front, dramatically faster, roughly 41% up on the Arc B580. Value tips toward the Arc B580, though: $1,559 BRL cheaper for what you get.
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Radeon RX 6800 vs Arc B580: In-Depth Breakdown
Performance: Radeon RX 6800 vs Arc B580
The Radeon RX 6800 is dramatically faster, around 41% ahead of the Arc B580. That gap is enough to move it up a tier: the Radeon RX 6800 is comfortable at 1440p, while the Arc B580 is better matched to 1080p.
Price & Value
Right now the Arc B580 starts at $3,000 BRL against $4,559 BRL for the Radeon RX 6800. Despite being slower, the Arc B580 offers the better performance-per-dollar (~8% better value), so budget-focused buyers should weigh it carefully. The Arc B580 still sits about $2,752 BRL above its $248 BRL MSRP. The Radeon RX 6800 still sits about $3,980 BRL above its $579 BRL MSRP.
Power & Efficiency
The Arc B580 is the lighter draw at 190W against the Radeon RX 6800's 250W, making it the easier card to power and cool. The Radeon RX 6800 draws more in absolute terms but squeezes out more performance per watt, so budget for a beefier PSU if you go that route.
VRAM & Future-Proofing
The Radeon RX 6800's 16GB (vs 12GB on the Arc B580) gives it more room for 4K textures and memory-hungry creative or AI workloads.
Generation & Longevity
The Arc B580 is roughly 4 years newer than the Radeon RX 6800 (Battlemage vs RDNA 2), so it generally benefits from a more modern architecture and longer driver-support runway.
Features & Ecosystem
Beyond raw numbers, the Arc B580 brings Intel XeSS upscaling and AV1 encoding, while the Radeon RX 6800 offers AMD FSR upscaling and strong rasterization value. If you lean on upscaling or ray tracing, that ecosystem difference can matter as much as the frame-rate gap.
Which should you buy: Arc B580 or Radeon RX 6800?
Choose the Radeon RX 6800 if you want the most performance and can absorb the higher price. If you're optimizing for value, the Arc B580 stretches your money further for only slightly lower performance.
Frequently Asked Questions
Is the Radeon RX 6800 better than the Arc B580?
Which is better for 4K gaming, the Arc B580 or the Radeon RX 6800?
Is the Radeon RX 6800 worth the extra $1,559 BRL over the Arc B580?
Does the Radeon RX 6800 have enough VRAM advantage to matter?
Which should you buy: Arc B580 or Radeon RX 6800?
Technical Specifications Comparison
Architecture & Cores
| Specification | Arc B580 | Radeon RX 6800 |
|---|---|---|
| Architecture | Battlemage | RDNA 2 |
| Process Node | TSMC N5 | TSMC N7 |
| CUDA Cores (Shading Units / Stream Processors) | 2,560 | 3,840✓ |
| Ray Tracing Cores | 20 | 60✓ |
| Tensor / AI Cores | 160 | — |
Clock Speeds
| Specification | Arc B580 | Radeon RX 6800 |
|---|---|---|
| Base Clock | 2,670 MHz✓ | 1,700 MHz |
| Boost Clock | 2,850 MHz✓ | 2,105 MHz |
Memory
| Specification | Arc B580 | Radeon RX 6800 |
|---|---|---|
| VRAM Capacity | 12 GB | 16 GB✓ |
| Memory Type | GDDR6 | GDDR6 |
| Memory Bus | 192-bit | 256-bit✓ |
| Memory Speed | 19 Gbps✓ | 16 Gbps |
| Bandwidth | 456 GB/s | 512 GB/s✓ |
Connectivity & Power
| Specification | Arc B580 | Radeon RX 6800 |
|---|---|---|
| Interface | PCIe 4.0 x8 | PCIe 4.0 x16 |
| TDP | 190 W✓ | 250 W |
| Power Connectors | 1x 8-pin | 2x 8-pin |
| Released | Dec 2024 | Nov 2020 |
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