AMD Radeon
RX 580
GCN 4.0 · 8 GB GDDR5
AMD Radeon VS AMD Radeon GPU COMPARISON
RX 580 vs RX 6400
Compare RightNow GPU Database specifications and median 3DMark Time Spy Graphics scores. The quick answer below is intentionally separated from game-specific FPS and live pricing.
VS
RX 6400
AMD Radeon
RX 6400
RDNA 2.0 · 4 GB GDDR6
QUICK ANSWER
RX 580 leads in 3DMark Time Spy
RX 580 has a median Graphics score of 4,348 versus 3,578 for RX 6400, a lead of about 22% in this synthetic workload.
3DMARK TIME SPY
Time Spy Graphics score comparison
Median Graphics scores across submitted 3DMark Time Spy results; higher is better.
RX 5804,348
Median Time Spy Graphics score · 369,006 resultsView 3DMark result searchRX 64003,578
Median Time Spy Graphics score · 7,335 resultsView 3DMark result searchTime Spy is a synthetic DirectX 12 workload, not an FPS guarantee. Submitted results can include different board models, drivers, cooling, overclocks, and laptop power limits. Models are desktop GPUs unless explicitly labeled Laptop.
SPECIFICATIONS
RX 580 vs RX 6400 specs
Reference specifications from the RightNow GPU Database, whose upstream records come from TechPowerUp.
| Specification | RX 580 | RX 6400 |
|---|---|---|
| Architecture | GCN 4.0 | RDNA 2.0 |
| GPU codename | Polaris 20 | Navi 24 |
| Foundry | GlobalFoundries | TSMC |
| Process size | 14 nm | 6 nm |
| Shader units | 2,304 | 768 |
| Base clock | 1,257 MHz | 1,923 MHz |
| Boost clock | 1,340 MHz | 2,321 MHz |
| Memory | 8 GB GDDR5 | 4 GB GDDR6 |
| Memory bus | 256-bit | 64-bit |
| Memory bandwidth | 256 GB/s | 128 GB/s |
| TMUs | 144 | 48 |
| ROPs | 32 | 32 |
| Tensor cores | Not listed | Not listed |
| Ray tracing cores | Not listed | 12 |
| L2 cache | 2 MB | 1 MB |
| TDP | 185 W | 53 W |
| Recommended system power | 450 W | 250 W |
| PCI Express | PCIe 3.0 x16 | PCIe 4.0 x4 |
| Power connectors | 1x 8-pin | Not listed |
| Display outputs | 1x HDMI 2.0b, 3x DisplayPort 1.4a | 1x HDMI 2.1, 1x DisplayPort 1.4a |
| DirectX | 12.0 | 12.2 |
| Vulkan | 1.3 | 1.4 |
| OpenGL | 4.6 | 4.6 |
| FP32 performance | 6.17 TFLOPS | 3.56 TFLOPS |
RX 580: RightNow GPU Database · upstream record · retrieved Aug 20, 2026
RX 6400: RightNow GPU Database · upstream record · retrieved Aug 20, 2026
HOW TO CHOOSE
Should you choose RX 580 or RX 6400?
A useful choice depends on performance, memory, power, price, and the games or workloads you actually use.
Start with measured performance
RX 580 has a median Graphics score of 4,348 versus 3,578 for RX 6400, a lead of about 22% in this synthetic workload. Treat a result within roughly three percent as effectively close in this synthetic workload.
Check memory and power
RX 580 lists 8 GB GDDR5 and 185 W graphics power; RX 6400 lists 4 GB GDDR6 and 53 W. Board-partner models can use different coolers, limits, and connectors.
Verify the exact game and price
This comparison does not invent FPS or value claims. Check independent testing for your games and resolution, then compare the current prices of the exact cards available to you.