RX 7800 XT
Arc B580
RX 7800 XT vs Arc B580
Which graphics card should you buy in 2026? Full spec comparison and analysis.
Our Pick: RX 7800 XT
The RX 7800 XT wins this matchup with better gaming performance, stronger overall benchmarks. While it costs $250 more, the performance premium is worth it for most users.
Performance Overview
Overall Performance
Gaming
Value for Money
Specifications Comparison
| Specification | RX 7800 XT | Arc B580 |
|---|---|---|
| MSRP | $499 | $249Win |
| VRAM | 16GBWin | 12GB |
| Memory Type | GDDR6 | GDDR6 |
| Boost Clock | 2430MHz | 2800MHzWin |
| Base Clock | 1295MHz | 1700MHzWin |
| Shader/Stream Processors | 3840Win | 320 |
| Performance | 18.7TFLOPSWin | 13.7TFLOPS |
| TDP | 263W | 190WWin |
| Memory Bus | 256-bitWin | 192-bit |
| Bandwidth | 624GB/sWin | 456GB/s |
| Architecture | RDNA 3 | Xe2 (Battlemage) |
| Process Node | 5nm | 5nm |
| RT Cores | 60Win | 20 |
| AI Upscaling | FSR 3 | XeSS 2 |
| Interface | PCIe 4.0 x16 | PCIe 4.0 x8 |
| Power Connector | 2x 8-pin | 1x 8-pin |
| Card Length | 267mmWin | 272mm |
| Benchmark Score | 43/100Win | 30/100 |
| Gaming Score | 46/100Win | 32/100 |
| Value Score | 72/100 | 88/100Win |
RX 7800 XT
MSRP: $499
Frequently Asked Questions
Is the RX 7800 XT better than the Arc B580?
The RX 7800 XT is the stronger card overall. It scores 43/100 in synthetic benchmarks and 46/100 in gaming versus 30/100 and 32/100 for the Arc B580. In practical terms, the RX 7800 XT is a 1440p medium / 1080p ultra card while the Arc B580 targets 1080p high. The RX 7800 XT also has 16GB of GDDR6 on a 256-bit bus, giving it more headroom for high-res textures and future titles.
Which is the better value, RX 7800 XT or Arc B580?
The RX 7800 XT costs 100% more for about 43% more performance. The Arc B580 at $249 offers noticeably better performance per dollar. Our value scores reflect this: RX 7800 XT gets 72/100 and Arc B580 gets 88/100. If you are building on a tighter budget, the Arc B580 at $249 is the smarter buy. If you can stretch to $499 and want the extra performance, the RX 7800 XT justifies its price for demanding workloads.
Can the RX 7800 XT or Arc B580 run games at 4K?
Neither card is an ideal 4K GPU. The RX 7800 XT can manage 4K at medium settings in less demanding titles, but both are really designed for 1440p or 1080p gaming. If 4K is a priority, consider stepping up to a higher-tier card.
RX 7800 XT vs Arc B580 for 1440p gaming -- which is better?
At 1440p, the RX 7800 XT is more comfortable but you may need to dial settings down in newer AAA games. The Arc B580 will struggle at 1440p ultra in demanding titles. For a consistent 1440p experience, the RX 7800 XT is the safer choice.
What CPU should I pair with the RX 7800 XT or Arc B580?
To avoid bottlenecking the RX 7800 XT (gaming score 46/100), pair it with at least a Ryzen 5 7600 or Ryzen 5 9600X. For the Arc B580 (gaming score 32/100), a Ryzen 5 7600 or Ryzen 5 9600X will keep things balanced. Overspending on the CPU relative to the GPU -- or vice versa -- leaves performance on the table. As a rule of thumb, your CPU should cost roughly 40-60% of your GPU budget for a gaming-focused build.
Is the RX 7800 XT worth it in 2026?
The RX 7800 XT remains a solid buy in 2026. With 16GB of GDDR6 and RDNA 3 architecture, it handles current games at 1440p medium / 1080p ultra settings without issues. Support for FSR 3 extends its lifespan further by boosting frame rates in supported titles. At $499 MSRP, it offers strong value and should stay relevant for at least another 2-3 years of AAA gaming.
Should I wait for next-gen or buy the Arc B580 now?
If you need a GPU now, the Arc B580 at $249 is a perfectly capable 1080p card. The latest GPUs (NVIDIA RTX 50-series Blackwell, AMD RDNA 4) are now available, so consider comparing against the newest options in your budget. The Arc B580's Xe2 (Battlemage) architecture and 12GB VRAM still have plenty of life left.
How much power does the RX 7800 XT vs Arc B580 use?
The RX 7800 XT draws 263W TDP versus 190W for the Arc B580, a difference of 73W. A 650W PSU should handle either card comfortably. The power difference is modest enough that PSU choice should not be a deciding factor between these two. The Arc B580 uses a 1x 8-pin connector while the RX 7800 XT needs 2x 8-pin.
How many FPS can I expect from the RX 7800 XT vs Arc B580?
Exact FPS varies by game and settings, but based on our gaming benchmark scores (RX 7800 XT: 46/100, Arc B580: 32/100), the RX 7800 XT typically delivers 44% more frames than the Arc B580 at the same resolution and settings. In popular titles at 1440p or 1080p, the RX 7800 XT with its 18.7 TFLOPS of compute power and 624 GB/s memory bandwidth pushes well above 60 FPS. Enabling FSR 3 upscaling can boost that by another 30-50% with minimal visual quality loss.