AMD Radeon HD 7770 GHz Edition vs AMD Radeon R7 M270
Graphics Processor
| GPU model | Cape Verde | Opal |
|---|---|---|
| GPU variant | Cape Verde XT | Opal XT |
| Architecture | GCN 1.0 | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 1,500 million | 950 million |
| Die size | 123 mm² | 77 mm² |
Graphics Card
| Release date | Feb 15th, 2012 | — |
|---|---|---|
| Generation | Southern Islands | — |
| Production | End-of-life | — |
| Launch price | 159 USD | — |
| Interface | PCIe 3.0 x16 | — |
| Reviews | 97 in our database | — |
| Predecessor | Northern Islands | — |
| Successor | Sea Islands | — |
Clocks
| GPU clock | 1000 MHz | — |
|---|---|---|
| Memory clock | 1125 MHz 4.5 Gbps effective | 900 MHz 1800 Mbps effective |
| Base clock | — | 725 MHz |
| Boost clock | — | 825 MHz |
Memory Configuration
| Memory size | 1024 MB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | DDR3 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 72.00 GB/s | 28.80 GB/s |
Render Configuration
| Shading units | 640 | 384 |
|---|---|---|
| TMUs | 40 | 24 |
| ROPs | 16 | 8 |
| Compute units | 10 | 6 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 256 KB |
Performance
| Pixel rate | 16.00 GPixel/s | 6.600 GPixel/s |
|---|---|---|
| Texture rate | 40.00 GTexel/s | 19.80 GTexel/s |
| FP32 (float) performance | 1,280 GFLOPS | 633.6 GFLOPS |
| FP64 (double) performance | 80.00 GFLOPS (1:16) | — |
Dimensions & Outputs
| Slot width | Dual-slot | — |
|---|---|---|
| Length | 210 mm 8.3 inches | — |
| TDP | 80 W | unknown |
| Suggested PSU | 250 W | — |
| Outputs | 1x DVI1x HDMI2x mini-DisplayPort | No outputs |
| Power connectors | 1x 6-pin | — |
| Board number | C441, C468 | — |
API Support & Features
| DirectX | 12 (11_1) | 12 (11_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 5.1 | 5.1 |
Other Features
Mobile graphics
| Release date | — | Jan 9th, 2014 |
|---|---|---|
| Generation | — | Crystal System (R7 M200) |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x8 |
| Predecessor | — | Solar System |
| Successor | — | Mobility Radeon |
