AMD Radeon RX 640 Mobile vs AMD Stream Processor
Graphics Processor
| GPU model | Polaris 23 | R580 |
|---|---|---|
| GPU variant | Polaris 23 XT | R580 XTX |
| Architecture | GCN 4.0 | R500 |
| Foundry | GlobalFoundries | TSMC |
| Manufacturing process | 14 nm | 90 nm |
| Number of transistors | 2,200 million | 384 million |
| Die size | 103 mm² | 352 mm² |
Mobile graphics
| Release date | May 13th, 2019 | — |
|---|---|---|
| Generation | Mobility Radeon (M600) | — |
| Production | Active | — |
| Interface | PCIe 3.0 x8 | — |
| Predecessor | Crystal System | — |
Clocks
| Base clock | 1082 MHz | — |
|---|---|---|
| Boost clock | 1218 MHz | — |
| Memory clock | 1500 MHz 6 Gbps effective | 648 MHz 1296 Mbps effective |
| GPU clock | — | 594 MHz |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR3 |
| Memory bus width | 64 bit | 256 bit |
| Bandwidth | 48.00 GB/s | 41.47 GB/s |
Render Configuration
| Shading units | 640 | — |
|---|---|---|
| TMUs | 40 | 16 |
| ROPs | 16 | 16 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 512 KB | — |
| Pixel shaders | — | 48 |
| Vertex shaders | — | 8 |
Performance
| Pixel rate | 19.49 GPixel/s | 9.504 GPixel/s |
|---|---|---|
| Texture rate | 48.72 GTexel/s | 9.504 GTexel/s |
| FP16 (half) performance | 1.559 TFLOPS (1:1) | — |
| FP32 (float) performance | 1.559 TFLOPS | — |
| FP64 (double) performance | 97.44 GFLOPS (1:16) | — |
| Vertex rate | — | 1.188 GVertices/s |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| TDP | 50 W | 165 W |
| Outputs | No outputs | 2x DVI1x S-Video |
| Power connectors | None | 1x 6-pin |
| Length | — | 241 mm 9.5 inches |
| Width | — | 111 mm 4.4 inches |
| Suggested PSU | — | 450 W |
API Support & Features
| DirectX | 12 (12_0) | 9.0c (9_3) |
|---|---|---|
| OpenGL | 4.6 | 2.1 (full) 3.0 (partial) |
| OpenCL | 2.1 | — |
| Vulkan | 1.2 | — |
| Shader model | 6.4 | 3.0 |
Other Features
Graphics Card
| Release date | — | 2006 |
|---|---|---|
| Generation | — | FireStream |
| Production | — | End-of-life |
| Interface | — | PCIe 1.0 x16 |
