AMD Radeon R9 M265X vs NVIDIA GeForce GT 640 Rev. 2
Graphics Processor
| GPU model | Venus | GK208 |
|---|---|---|
| GPU variant | Venus PRO | GK208-400-A1 |
| Architecture | GCN 1.0 | Kepler 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 1,500 million | 1,020 million |
| Die size | 123 mm² | 87 mm² |
Mobile graphics
| Release date | Mar 21st, 2014 | — |
|---|---|---|
| Generation | Crystal System (R9 M200) | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x16 | — |
| Predecessor | Solar System | — |
| Successor | Mobility Radeon | — |
Clocks
| Base clock | 575 MHz | — |
|---|---|---|
| Boost clock | 625 MHz | — |
| Memory clock | 1000 MHz 4 Gbps effective | 1252 MHz 5 Gbps effective |
| GPU clock | — | 1046 MHz |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 64 bit |
| Bandwidth | 64.00 GB/s | 40.06 GB/s |
Render Configuration
| Shading units | 640 | 384 |
|---|---|---|
| TMUs | 40 | 32 |
| ROPs | 16 | 8 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 512 KB |
| SMX count | — | 2 |
Performance
| Pixel rate | 10.00 GPixel/s | 8.368 GPixel/s |
|---|---|---|
| Texture rate | 25.00 GTexel/s | 33.47 GTexel/s |
| FP32 (float) performance | 800.0 GFLOPS | 803.3 GFLOPS |
| FP64 (double) performance | 50.00 GFLOPS (1:16) | 33.47 GFLOPS (1:24) |
Dimensions & Outputs
| TDP | unknown | 49 W |
|---|---|---|
| Outputs | No outputs | 1x DVI1x HDMI1x VGA |
| Slot width | — | Single-slot |
| Length | — | 145 mm 5.7 inches |
| Suggested PSU | — | 200 W |
| Power connectors | — | None |
| Board number | — | P2131 |
API Support & Features
| DirectX | 12 (11_1) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | 1.2 | 1.1 |
| Shader model | 5.1 | 5.1 |
| CUDA | — | 3.5 |
Other Features
Graphics Card
| Release date | — | May 29th, 2013 |
|---|---|---|
| Generation | — | GeForce 600 |
| Production | — | End-of-life |
| Launch price | — | 89 USD |
| Interface | — | PCIe 2.0 x8 |
| Predecessor | — | GeForce 500 |
| Successor | — | GeForce 700 |
