Updated June 21, 2026
Compare Radeon RX 6400 vs Radeon RX Vega 56 side by side. See benchmark performance, live prices, value metrics, and full graphics card specs.
Verdict: The Radeon RX 6400 and Radeon RX Vega 56 are very closely matched in performance (19/100 vs 18/100). The Radeon RX Vega 56 costs $72 less ($68 vs $140). For value, the Radeon RX Vega 56 wins at $3.75/pt vs $7.21/pt.
PickGPU Score is a composite of Tom's Hardware raster and ray tracing benchmarks across all resolutions (70% raster / 30% ray tracing, weighted by Steam Hardware Survey data). Scaled so 100 = the best GPU currently in the dataset. Value ($/pt) = price divided by PickGPU Score — lower is better value.
| Spec | Radeon RX 6400 | Radeon RX Vega 56 |
|---|---|---|
| Architecture | RDNA 2.0 | GCN 5.0 |
| Generation | Navi II (RX 6000) | Vega |
| VRAM | 4.0 | 8.0 |
| Boost Clock | 2321.0 | 1471.0 |
| TDP | 53.0 | 210.0 |
| MSRP | 159.0 | 399.0 |
| 1080p Medium FPS | N/A | N/A |
| 1080p Ultra FPS | N/A | N/A |
| 1440p Ultra FPS | N/A | N/A |
| 4K Ultra FPS | N/A | N/A |
| 1080p Medium RT FPS | N/A | N/A |
| 1080p Ultra RT FPS | N/A | N/A |
| 1440p Ultra RT FPS | N/A | N/A |
| 4K Ultra RT FPS | N/A | N/A |
| PickGPU Score | 19/100 | 18/100 |
| Value ($/pt) | $7.21/pt | $3.75/pt |
| Lowest Price | $140.00 | $68.50 |
| Buy | Buy on eBay | Buy on eBay |
View Radeon RX Vega 56 details
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| Parameter | Values | Default |
|---|---|---|
condition | New · All | All (new + used) |
performanceColumn | pickGpuPerformanceScore, or {current|legacy|normalized}_{1080pMediumFps|1080pUltraFps|1440pUltraFps|4KUltraFps|rt1080pMediumFps|rt1080pUltraFps|rt1440pUltraFps|rt4KUltraFps} | pickGpuPerformanceScore |