AMD Radeon R7 340 OEM vs NVIDIA GeForce GT 645M
Graphics Processor
| GPU model | Oland | GK107 |
|---|---|---|
| Architecture | GCN 1.0 | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 950 million | 1,270 million |
| Die size | 77 mm² | 118 mm² |
| GPU variant | — | N13P-GS |
Graphics Card
| Release date | May 5th, 2015 | — |
|---|---|---|
| Generation | Pirate Islands | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x8 | — |
| Predecessor | Volcanic Islands | — |
| Successor | Arctic Islands | — |
Clocks
| Base clock | 730 MHz | — |
|---|---|---|
| Boost clock | 780 MHz | — |
| Memory clock | 1000 MHz 4 Gbps effective | 900 MHz 1800 Mbps effective |
| GPU clock | — | 709 MHz |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | DDR3 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 64.00 GB/s | 28.80 GB/s |
Render Configuration
| Shading units | 384 | 384 |
|---|---|---|
| TMUs | 24 | 32 |
| ROPs | 8 | 16 |
| Compute units | 6 | — |
| Cache L1 | 16 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 256 KB |
| SMX count | — | 2 |
Performance
| Pixel rate | 6.240 GPixel/s | 5.672 GPixel/s |
|---|---|---|
| Texture rate | 18.72 GTexel/s | 22.69 GTexel/s |
| FP32 (float) performance | 599.0 GFLOPS | 544.5 GFLOPS |
| FP64 (double) performance | 37.44 GFLOPS (1:16) | 22.69 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | Single-slot | — |
|---|---|---|
| TDP | 50 W | 32 W |
| Suggested PSU | 250 W | — |
| Outputs | 1x DVI1x HDMI1x VGA | No outputs |
| Power connectors | None | — |
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 | — | 3.0 |
Other Features
Mobile graphics
| Release date | — | Oct 1st, 2012 |
|---|---|---|
| Generation | — | GeForce 600M |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | GeForce 500M |
| Successor | — | GeForce 700M |
