Product Compare
AMD Radeon R9 390 X2 vs AMD Radeon HD 7990
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Sep 2015 | Apr 2013 |
| Generation | Pirate Islands | Southern Islands |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Memory Clock | 1350 MHz | 1500 MHz |
| Base Clock | 950 MHz | |
| Boost Clock | 1000 MHz | |
| Memory | ||
| Memory Size | 8GB | 3GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 512bit | 384bit |
| Bandwidth | 345.6GB/s | 288.0GB/s |
| Render Config | ||
| Compute Units | 40 | 32 |
| Shading Units | 2560 | 2048 |
| TMUs | 160 | 128 |
| ROPs | 64 | 32 |
| L1 Cache | 16 KB (per CU) | 16 KB (per CU) |
| L2 Cache | 1024 KB | 768 KB |
| Theoretical Performance | ||
| Pixel Rate | 64.00 GPixel/s | 32.00 GPixel/s |
| Texture Rate | 160.0 GTexel/s | 128.0 GTexel/s |
| FP32 (float) | 5.120 TFLOPS | 4.096 TFLOPS |
| FP64 (double) | 640.0 GFLOPS | 1024 GFLOPS |
| Graphics Processor | ||
| GPU Name | Grenada | Malta |
| GPU Variant | Grenada PRO(215-0880030) | Malta XT(215-0849026) |
| Architecture | GCN 2.0 | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 28 nm |
| Transistors | 6.2 billion | 4.313 billion |
| Die Size | 438 mm² | 365 mm² |
| Board Design | ||
| TDP | 580W | 375W |
| Suggested PSU | 950 W | 750 W |
| Outputs | 2x DVI1x HDMI 1.4a1x DisplayPort 1.2 | 1x DVI4x mini-DisplayPort 1.2 |
| Power Connectors | 4x 8-pin | 2x 8-pin |
| Graphics Features | ||
| DirectX | 12 (12_0) | 12 (11_1) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 1.2 |
| Vulkan | 1.2 | 1.2 |
| Shader Model | 6.3 | 5.1 |