GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
Market Value Leader
Radeon RX 580 is the clear winner, offering 1240.6% better value than Radeon RX 6400.
On performance, the Radeon RX 580 and Radeon RX 6400 are effectively a dead heat — under a few percent apart. It is also the stronger value pick here, so it's the easy recommendation if your budget allows.
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Radeon RX 580 vs Radeon RX 6400: In-Depth Breakdown
Performance: Radeon RX 580 vs Radeon RX 6400
The Radeon RX 580 and Radeon RX 6400 post nearly the same score in our performance index, so neither holds a meaningful raw-speed advantage. Both are best suited to entry-level 1080p gaming. The Radeon RX 580 packs 2,304 stream processors versus 768 on the Radeon RX 6400.
Price & Value
Right now the Radeon RX 580 starts at $114 BRL against $1,528 BRL for the Radeon RX 6400. Because it's both faster and competitively priced, the Radeon RX 580 wins on performance-per-dollar by about 1241%. The Radeon RX 580 is trading below its $229 BRL MSRP — a genuine deal. The Radeon RX 6400 still sits about $1,369 BRL above its $159 BRL MSRP.
Power & Efficiency
The Radeon RX 6400 draws just 53W versus 185W for the Radeon RX 580, and it also delivers more performance per watt — so it runs cooler and quieter and needs less PSU headroom. Its more modern RDNA 2 architecture on a TSMC N6 process is part of why it does more with each watt.
VRAM & Future-Proofing
With 8GB against 4GB, the Radeon RX 580 has more headroom for 4K textures and memory-hungry creative/AI tasks where the Radeon RX 6400's 4GB can fall short. The Radeon RX 580's memory is also faster — 256 GB/s versus 128 GB/s (256-bit vs 64-bit bus) — which helps feed the GPU at 4K and with heavy textures.
Generation & Longevity
The Radeon RX 6400 is roughly 5 years newer than the Radeon RX 580 (RDNA 2 vs GCN 4.0 (Polaris)), so it generally benefits from a more modern architecture and longer driver-support runway.
Which should you buy: Radeon RX 580 or Radeon RX 6400?
The Radeon RX 580 is the all-round winner here — it's faster and the better value, so buy it if it fits your budget. Only consider the Radeon RX 6400 if you find it at a steep discount.
Frequently Asked Questions
Is the Radeon RX 580 better than the Radeon RX 6400?
Which is better for 4K gaming, the Radeon RX 580 or the Radeon RX 6400?
Is the Radeon RX 6400 worth the extra $1,414 BRL over the Radeon RX 580?
Does the Radeon RX 580 have enough VRAM advantage to matter?
Technical Specifications Comparison
Architecture & Cores
| Specification | Radeon RX 580 | Radeon RX 6400 |
|---|---|---|
| Architecture | GCN 4.0 (Polaris) | RDNA 2 |
| Process Node | GloFo 14nm | TSMC N6 |
| CUDA Cores (Stream Processors / Stream Processors) | 2,304✓ | 768 |
| Ray Tracing Cores | — | 12 |
Clock Speeds
| Specification | Radeon RX 580 | Radeon RX 6400 |
|---|---|---|
| Base Clock | 1,257 MHz | 1,923 MHz✓ |
| Boost Clock | 1,340 MHz | 2,321 MHz✓ |
Memory
| Specification | Radeon RX 580 | Radeon RX 6400 |
|---|---|---|
| VRAM Capacity | 8 GB✓ | 4 GB |
| Memory Type | GDDR5 | GDDR6 |
| Memory Bus | 256-bit✓ | 64-bit |
| Memory Speed | 8 Gbps | 16 Gbps✓ |
| Bandwidth | 256 GB/s✓ | 128 GB/s |
Connectivity & Power
| Specification | Radeon RX 580 | Radeon RX 6400 |
|---|---|---|
| Interface | PCIe 3.0 x16 | PCIe 4.0 x4 |
| TDP | 185 W | 53 W✓ |
| Power Connectors | 1x 8-pin | None |
| Released | Apr 2017 | Jan 2022 |
