AMD Radeon RX 640 Mobile vs ATI Radeon HD 5870
Graphics Processor
| GPU model | Polaris 23 | Cypress |
|---|---|---|
| GPU variant | Polaris 23 XT | Cypress XT (215-0735033) |
| Architecture | GCN 4.0 | TeraScale 2 |
| Foundry | GlobalFoundries | TSMC |
| Manufacturing process | 14 nm | 40 nm |
| Number of transistors | 2,200 million | 2,154 million |
| Die size | 103 mm² | 334 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 | 1200 MHz 4.8 Gbps effective |
| GPU clock | — | 850 MHz |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 64 bit | 256 bit |
| Bandwidth | 48.00 GB/s | 153.6 GB/s |
Render Configuration
| Shading units | 640 | 1600 |
|---|---|---|
| TMUs | 40 | 80 |
| ROPs | 16 | 32 |
| Compute units | 10 | 20 |
| Cache L1 | 16 KB (per CU) | 8 KB (per CU) |
| Cache L2 | 512 KB | 512 KB |
Performance
| Pixel rate | 19.49 GPixel/s | 27.20 GPixel/s |
|---|---|---|
| Texture rate | 48.72 GTexel/s | 68.00 GTexel/s |
| FP16 (half) performance | 1.559 TFLOPS (1:1) | — |
| FP32 (float) performance | 1.559 TFLOPS | 2.720 TFLOPS |
| FP64 (double) performance | 97.44 GFLOPS (1:16) | 544.0 GFLOPS (1:5) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| TDP | 50 W | 188 W |
| Outputs | No outputs | 2x DVI1x HDMI1x DisplayPort |
| Power connectors | None | 2x 6-pin |
| Length | — | 280 mm 11 inches |
| Width | — | 111 mm 4.4 inches |
| Height | — | 37 mm 1.5 inches |
| Suggested PSU | — | 450 W |
| Board number | — | C001-37 |
API Support & Features
| DirectX | 12 (12_0) | 11.2 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.4 |
| OpenCL | 2.1 | 1.2 |
| Vulkan | 1.2 | — |
| Shader model | 6.4 | 5.0 |
Other Features
Graphics Card
| Release date | — | Sep 23rd, 2009 |
|---|---|---|
| Generation | — | Evergreen |
| Production | — | End-of-life |
| Launch price | — | 399 USD |
| Interface | — | PCIe 2.0 x16 |
| Reviews | — | 171 in our database |
| Predecessor | — | Radeon R700 |
| Successor | — | Northern Islands |
