AMD Radeon 620 Mobile vs NVIDIA GeForce GT 645M
Graphics Processor
| GPU model | Polaris 24 | GK107 |
|---|---|---|
| GPU variant | Polaris 24 XL | N13P-GS |
| Architecture | GCN 3.0 | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 1,550 million | 1,270 million |
| Die size | 125 mm² | 118 mm² |
Mobile graphics
| Release date | May 13th, 2019 | Oct 1st, 2012 |
|---|---|---|
| Generation | Mobility Radeon (M600) | GeForce 600M |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x8 | PCIe 3.0 x16 |
| Predecessor | Crystal System | GeForce 500M |
| Successor | — | GeForce 700M |
Clocks
| Base clock | 730 MHz | — |
|---|---|---|
| Boost clock | 1024 MHz | — |
| Memory clock | 900 MHz 1800 Mbps effective | 900 MHz 1800 Mbps effective |
| GPU clock | — | 709 MHz |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | DDR3 | DDR3 |
| Memory bus width | 64 bit | 128 bit |
| Bandwidth | 14.40 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 | 128 KB | 256 KB |
| SMX count | — | 2 |
Performance
| Pixel rate | 8.192 GPixel/s | 5.672 GPixel/s |
|---|---|---|
| Texture rate | 24.58 GTexel/s | 22.69 GTexel/s |
| FP16 (half) performance | 786.4 GFLOPS (1:1) | — |
| FP32 (float) performance | 786.4 GFLOPS | 544.5 GFLOPS |
| FP64 (double) performance | 49.15 GFLOPS (1:16) | 22.69 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | IGP | — |
|---|---|---|
| TDP | 50 W | 32 W |
| Outputs | No outputs | No outputs |
| Power connectors | None | — |
API Support & Features
| DirectX | 12 (12_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 3.0 |
| Vulkan | 1.2 | 1.1 |
| Shader model | 6.3 | 5.1 |
| CUDA | — | 3.0 |
