Product Compare
AMD Radeon RX 6600 vs AMD Radeon R9 390
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Oct 2021 | Jun 2015 |
| Generation | Navi II | Pirate Islands |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 4.0 x8 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Base Clock | 1626 MHz | |
| Boost Clock | 2491 MHz | |
| Memory Clock | 1750 MHz | 1500 MHz |
| Memory | ||
| Memory Size | 8GB | 8GB |
| Memory Type | GDDR6 | GDDR5 |
| Memory Bus | 128bit | 512bit |
| Bandwidth | 224.0GB/s | 384.0GB/s |
| Render Config | ||
| Compute Units | 28 | 40 |
| Shading Units | 1792 | 2560 |
| TMUs | 112 | 160 |
| ROPs | 64 | 64 |
| RT Cores | 28 | |
| L1 Cache | 128 KB per Array | 16 KB (per CU) |
| L2 Cache | 2 MB | 1024 KB |
| L3 Cache | 32 MB | |
| Theoretical Performance | ||
| Pixel Rate | 159.4 GPixel/s | 64.00 GPixel/s |
| Texture Rate | 279.0 GTexel/s | 160.0 GTexel/s |
| FP16 (half) | 17.86 TFLOPS | |
| FP32 (float) | 8.928 TFLOPS | 5.120 TFLOPS |
| FP64 (double) | 558.0 GFLOPS | 640.0 GFLOPS |
| Graphics Processor | ||
| GPU Name | Navi 23 | Grenada |
| GPU Variant | Navi 23 XL(215-130000016) | Grenada PRO(215-0880030) |
| Architecture | RDNA 2.0 | GCN 2.0 |
| Foundry | TSMC | TSMC |
| Process Size | 7 nm | 28 nm |
| Transistors | 11.06 billion | 6.2 billion |
| Die Size | 237 mm² | 438 mm² |
| Board Design | ||
| TDP | 132W | 275W |
| Suggested PSU | 300 W | 600 W |
| Outputs | 1x HDMI 2.13x DisplayPort 1.4a | 2x DVI1x HDMI 1.4a1x DisplayPort 1.2 |
| Power Connectors | 1x 8-pin | 1x 6-pin + 1x 8-pin |
| Graphics Features | ||
| DirectX | 12 Ultimate (12_2) | 12 (12_0) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 2.0 |
| Vulkan | 1.3 | 1.2 |
| Shader Model | 6.5 | 6.3 |