Updated June 21, 2026
Compare Radeon RX 6400 vs Radeon RX 6600 side by side. See benchmark performance, live prices, value metrics, and full graphics card specs.
Verdict: The Radeon RX 6400 and Radeon RX 6600 are very closely matched in performance (19/100 vs 20/100). The Radeon RX 6400 costs $35 less ($140 vs $175). For value, the Radeon RX 6400 wins at $7.21/pt vs $8.92/pt.
PickGPU Score is a composite of Tom's Hardware raster and ray tracing benchmarks across all resolutions (70% raster / 30% ray tracing, weighted by Steam Hardware Survey data). Scaled so 100 = the best GPU currently in the dataset. Value ($/pt) = price divided by PickGPU Score — lower is better value.
| Spec | Radeon RX 6400 | Radeon RX 6600 |
|---|---|---|
| Architecture | RDNA 2.0 | RDNA 2.0 |
| Generation | Navi II (RX 6000) | Navi II (RX 6000) |
| VRAM | 4.0 | 8.0 |
| Boost Clock | 2321.0 | 2491.0 |
| TDP | 53.0 | 132.0 |
| MSRP | 159.0 | 329.0 |
| 1080p Medium FPS | N/A | 64.1 FPS |
| 1080p Ultra FPS | N/A | 37.2 FPS |
| 1440p Ultra FPS | N/A | 24.1 FPS |
| 4K Ultra FPS | N/A | 12.2 FPS |
| 1080p Medium RT FPS | N/A | 48.6 FPS |
| 1080p Ultra RT FPS | N/A | 27.5 FPS |
| 1440p Ultra RT FPS | N/A | 14.5 FPS |
| 4K Ultra RT FPS | N/A | 7.0 FPS |
| PickGPU Score | 19/100 | 20/100 |
| Value ($/pt) | $7.21/pt | $8.92/pt |
| Lowest Price | $140.00 | $175.00 |
| Buy | Buy on eBay | Buy on eBay |
Append query parameters to this URL to change which prices and metrics are shown.
| Parameter | Values | Default |
|---|---|---|
condition | New · All | All (new + used) |
performanceColumn | pickGpuPerformanceScore, or {current|legacy|normalized}_{1080pMediumFps|1080pUltraFps|1440pUltraFps|4KUltraFps|rt1080pMediumFps|rt1080pUltraFps|rt1440pUltraFps|rt4KUltraFps} | pickGpuPerformanceScore |