AMD Radeon 620 Mobile vs AMD Radeon HD 6770M Mac Edition
Graphics Processor
| GPU model | Polaris 24 | Whistler |
|---|---|---|
| GPU variant | Polaris 24 XL | Whistler XT (216-0810001) |
| Architecture | GCN 3.0 | TeraScale 2 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 40 nm |
| Number of transistors | 1,550 million | 716 million |
| Die size | 125 mm² | 104 mm² |
Mobile graphics
| Release date | May 13th, 2019 | Jan 28th, 2011 |
|---|---|---|
| Generation | Mobility Radeon (M600) | Vancouver (HD 6700M) |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x8 | MXM-A (3.0) |
| Predecessor | Crystal System | Manhattan |
| Successor | — | London |
Clocks
| Base clock | 730 MHz | — |
|---|---|---|
| Boost clock | 1024 MHz | — |
| Memory clock | 900 MHz 1800 Mbps effective | 900 MHz 3.6 Gbps effective |
| GPU clock | — | 725 MHz |
Memory Configuration
| Memory size | 2 GB | 512 MB |
|---|---|---|
| Memory type | DDR3 | GDDR5 |
| Memory bus width | 64 bit | 128 bit |
| Bandwidth | 14.40 GB/s | 57.60 GB/s |
Render Configuration
| Shading units | 384 | 480 |
|---|---|---|
| TMUs | 24 | 24 |
| ROPs | 8 | 8 |
| Compute units | 6 | 6 |
| Cache L1 | 16 KB (per CU) | 8 KB (per CU) |
| Cache L2 | 128 KB | 256 KB |
Performance
| Pixel rate | 8.192 GPixel/s | 5.800 GPixel/s |
|---|---|---|
| Texture rate | 24.58 GTexel/s | 17.40 GTexel/s |
| FP16 (half) performance | 786.4 GFLOPS (1:1) | — |
| FP32 (float) performance | 786.4 GFLOPS | 696.0 GFLOPS |
| FP64 (double) performance | 49.15 GFLOPS (1:16) | — |
Dimensions & Outputs
| Slot width | IGP | MXM Module |
|---|---|---|
| TDP | 50 W | 35 W |
| Outputs | No outputs | No outputs |
| Power connectors | None | — |
API Support & Features
| DirectX | 12 (12_0) | 11.2 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.4 |
| OpenCL | 2.0 | 1.2 |
| Vulkan | 1.2 | — |
| Shader model | 6.3 | 5.0 |
