AMD Radeon 620 Mobile vs AMD Radeon HD 8770 OEM
Graphics Processor
| GPU model | Polaris 24 | Bonaire |
|---|---|---|
| GPU variant | Polaris 24 XL | Bonaire XT (215-0839039) |
| Architecture | GCN 3.0 | GCN 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 1,550 million | 2,080 million |
| Die size | 125 mm² | 160 mm² |
Mobile graphics
| Release date | May 13th, 2019 | — |
|---|---|---|
| Generation | Mobility Radeon (M600) | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x8 | — |
| Predecessor | Crystal System | — |
Clocks
| Base clock | 730 MHz | — |
|---|---|---|
| Boost clock | 1024 MHz | — |
| Memory clock | 900 MHz 1800 Mbps effective | 1500 MHz 6 Gbps effective |
| GPU clock | — | 1050 MHz |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | DDR3 | GDDR5 |
| Memory bus width | 64 bit | 128 bit |
| Bandwidth | 14.40 GB/s | 96.00 GB/s |
Render Configuration
| Shading units | 384 | 896 |
|---|---|---|
| TMUs | 24 | 56 |
| ROPs | 8 | 16 |
| Compute units | 6 | 14 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 128 KB | 256 KB |
Performance
| Pixel rate | 8.192 GPixel/s | 16.80 GPixel/s |
|---|---|---|
| Texture rate | 24.58 GTexel/s | 58.80 GTexel/s |
| FP16 (half) performance | 786.4 GFLOPS (1:1) | — |
| FP32 (float) performance | 786.4 GFLOPS | 1.882 TFLOPS |
| FP64 (double) performance | 49.15 GFLOPS (1:16) | 117.6 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | IGP | Dual-slot |
|---|---|---|
| TDP | 50 W | 85 W |
| Outputs | No outputs | 1x DVI1x HDMI2x mini-DisplayPort |
| Power connectors | None | 1x 6-pin |
| Length | — | 183 mm 7.2 inches |
| Suggested PSU | — | 250 W |
API Support & Features
| DirectX | 12 (12_0) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 2.0 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 6.3 | 6.3 |
Other Features
Graphics Card
| Release date | — | Sep 2nd, 2013 |
|---|---|---|
| Generation | — | Sea Islands |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | Southern Islands |
| Successor | — | Volcanic Islands |
