AMD Radeon RX 640 Mobile vs NVIDIA GeForce GT 645 OEM
Graphics Processor
| GPU model | Polaris 23 | GF114 |
|---|---|---|
| GPU variant | Polaris 23 XT | — |
| Architecture | GCN 4.0 | Fermi 2.0 |
| Foundry | GlobalFoundries | TSMC |
| Manufacturing process | 14 nm | 40 nm |
| Number of transistors | 2,200 million | 1,950 million |
| Die size | 103 mm² | 332 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 | 957 MHz 3.8 Gbps effective |
| GPU clock | — | 776 MHz |
| Shader clock | — | 1552 MHz |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 64 bit | 192 bit |
| Bandwidth | 48.00 GB/s | 91.87 GB/s |
Render Configuration
| Shading units | 640 | 288 |
|---|---|---|
| TMUs | 40 | 48 |
| ROPs | 16 | 24 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | 64 KB (per SM) |
| Cache L2 | 512 KB | 384 KB |
| SM count | — | 6 |
Performance
| Pixel rate | 19.49 GPixel/s | 9.312 GPixel/s |
|---|---|---|
| Texture rate | 48.72 GTexel/s | 37.25 GTexel/s |
| FP16 (half) performance | 1.559 TFLOPS (1:1) | — |
| FP32 (float) performance | 1.559 TFLOPS | 894.0 GFLOPS |
| FP64 (double) performance | 97.44 GFLOPS (1:16) | 74.50 GFLOPS (1:12) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| TDP | 50 W | 102 W |
| Outputs | No outputs | 2x DVI1x mini-HDMI |
| Power connectors | None | — |
| Length | — | 210 mm 8.3 inches |
| Suggested PSU | — | 300 W |
API Support & Features
| DirectX | 12 (12_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 1.1 |
| Vulkan | 1.2 | — |
| Shader model | 6.4 | 5.1 |
| CUDA | — | 2.1 |
Other Features
Graphics Card
| Release date | — | Apr 24th, 2012 |
|---|---|---|
| Generation | — | GeForce 600 |
| Production | — | End-of-life |
| Interface | — | PCIe 2.0 x16 |
| Predecessor | — | GeForce 500 |
| Successor | — | GeForce 700 |
