AMD Radeon R7 250X vs AMD Radeon RX 640 Mobile
Graphics Processor
| GPU model | Cape Verde | Polaris 23 |
|---|---|---|
| GPU variant | Cape Verde XT | Polaris 23 XT |
| Architecture | GCN 1.0 | GCN 4.0 |
| Foundry | TSMC | GlobalFoundries |
| Manufacturing process | 28 nm | 14 nm |
| Number of transistors | 1,500 million | 2,200 million |
| Die size | 123 mm² | 103 mm² |
Graphics Card
| Release date | Feb 13th, 2014 | — |
|---|---|---|
| Generation | Volcanic Islands | — |
| Production | End-of-life | — |
| Launch price | 99 USD | — |
| Interface | PCIe 3.0 x16 | — |
| Predecessor | Sea Islands | — |
| Successor | Pirate Islands | — |
Clocks
| GPU clock | 950 MHz | — |
|---|---|---|
| Memory clock | 1125 MHz 4.5 Gbps effective | 1500 MHz 6 Gbps effective |
| Base clock | — | 1082 MHz |
| Boost clock | — | 1218 MHz |
Memory Configuration
| Memory size | 1024 MB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 64 bit |
| Bandwidth | 72.00 GB/s | 48.00 GB/s |
Render Configuration
| Shading units | 640 | 640 |
|---|---|---|
| TMUs | 40 | 40 |
| ROPs | 16 | 16 |
| Compute units | 10 | 10 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 512 KB |
Performance
| Pixel rate | 15.20 GPixel/s | 19.49 GPixel/s |
|---|---|---|
| Texture rate | 38.00 GTexel/s | 48.72 GTexel/s |
| FP32 (float) performance | 1,216 GFLOPS | 1.559 TFLOPS |
| FP64 (double) performance | 76.00 GFLOPS (1:16) | 97.44 GFLOPS (1:16) |
| FP16 (half) performance | — | 1.559 TFLOPS (1:1) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 210 mm 8.3 inches | — |
| TDP | 80 W | 50 W |
| Suggested PSU | 250 W | — |
| Outputs | 1x DVI1x HDMI2x mini-DisplayPort | No outputs |
| Power connectors | 1x 6-pin | None |
| Board number | C441, C698 | — |
API Support & Features
| DirectX | 12 (11_1) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.1 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 5.1 | 6.4 |
Other Features
Mobile graphics
| Release date | — | May 13th, 2019 |
|---|---|---|
| Generation | — | Mobility Radeon (M600) |
| Production | — | Active |
| Interface | — | PCIe 3.0 x8 |
| Predecessor | — | Crystal System |
