Product Compare
AMD Radeon HD 7990 vs AMD Radeon 660M
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Apr 2013 | Jan 2022 |
| Generation | Southern Islands | Rembrandt |
| Type | Desktop | Integrated |
| Bus Interface | PCIe 3.0 x16 | PCIe 4.0 x8 |
| Clock Speeds | ||
| Base Clock | 950 MHz | 1500 MHz |
| Boost Clock | 1000 MHz | 1900 MHz |
| Memory Clock | 1500 MHz | System Shared |
| Memory | ||
| Memory Size | 3GB | System Shared |
| Memory Type | GDDR5 | System Shared |
| Memory Bus | 384bit | System Shared |
| Bandwidth | 288.0GB/s | System Dependent |
| Render Config | ||
| Compute Units | 32 | 6 |
| Shading Units | 2048 | 384 |
| TMUs | 128 | 24 |
| ROPs | 32 | 16 |
| L1 Cache | 16 KB (per CU) | 128 KB per Array |
| L2 Cache | 768 KB | 2 MB |
| RT Cores | 6 | |
| Theoretical Performance | ||
| Pixel Rate | 32.00 GPixel/s | 30.40 GPixel/s |
| Texture Rate | 128.0 GTexel/s | 45.60 GTexel/s |
| FP32 (float) | 4.096 TFLOPS | 1459 GFLOPS |
| FP64 (double) | 1024 GFLOPS | 91.20 GFLOPS |
| FP16 (half) | 2.918 TFLOPS | |
| Graphics Processor | ||
| GPU Name | Malta | Rembrandt |
| GPU Variant | Malta XT(215-0849026) | |
| Architecture | GCN 1.0 | RDNA 2.0 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 6 nm |
| Transistors | 4.313 billion | 13.1 billion |
| Die Size | 365 mm² | 210 mm² |
| Board Design | ||
| TDP | 375W | 15W |
| 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) | 12 Ultimate (12_2) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | 1.2 | 1.2 |
| Shader Model | 5.1 | 6.5 |