Product Compare
AMD Radeon HD 7990 vs AMD Radeon HD 6990M
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Apr 2013 | Jul 2011 |
| Generation | Southern Islands | Vancouver |
| Type | Desktop | Mobile |
| Bus Interface | PCIe 3.0 x16 | MXM-B (3.0) |
| Clock Speeds | ||
| Base Clock | 950 MHz | |
| Boost Clock | 1000 MHz | |
| Memory Clock | 1500 MHz | 900 MHz |
| Memory | ||
| Memory Size | 3GB | 2GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 384bit | 256bit |
| Bandwidth | 288.0GB/s | 115.2GB/s |
| Render Config | ||
| Compute Units | 32 | 14 |
| Shading Units | 2048 | 1120 |
| TMUs | 128 | 56 |
| ROPs | 32 | 32 |
| L1 Cache | 16 KB (per CU) | 8 KB (per CU) |
| L2 Cache | 768 KB | 512 KB |
| Theoretical Performance | ||
| Pixel Rate | 32.00 GPixel/s | 22.88 GPixel/s |
| Texture Rate | 128.0 GTexel/s | 40.04 GTexel/s |
| FP32 (float) | 4.096 TFLOPS | 1.602 TFLOPS |
| FP64 (double) | 1024 GFLOPS | |
| Graphics Processor | ||
| GPU Name | Malta | Blackcomb |
| GPU Variant | Malta XT(215-0849026) | Blackcomb XTX(216-0811030) |
| Architecture | GCN 1.0 | TeraScale 2 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 40 nm |
| Transistors | 4.313 billion | 1.7 billion |
| Die Size | 365 mm² | 212 mm² |
| Board Design | ||
| TDP | 375W | 100W |
| Suggested PSU | 750 W | |
| Outputs | 1x DVI4x mini-DisplayPort 1.2 | No outputs |
| Power Connectors | 2x 8-pin | None |
| Graphics Features | ||
| DirectX | 12 (11_1) | 11.2 (11_0) |
| OpenGL | 4.6 | 4.4 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | 1.2 | N/A |
| Shader Model | 5.1 | 5.0 |