AMD Radeon HD 6770 Green Edition vs AMD Radeon R7 250
Graphics Processor
| GPU model | Juniper | Cape Verde |
|---|---|---|
| GPU variant | Juniper LE (215-0754009) | Cape Verde PRO |
| Architecture | TeraScale 2 | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 1,040 million | 1,500 million |
| Die size | 166 mm² | 123 mm² |
Graphics Card
| Release date | Apr 19th, 2013 | Oct 8th, 2013 |
|---|---|---|
| Generation | Northern Islands | Volcanic Islands |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Predecessor | Evergreen | Sea Islands |
| Successor | Southern Islands | Pirate Islands |
Clocks
| GPU clock | 700 MHz | 700 MHz |
|---|---|---|
| Memory clock | 667 MHz 1334 Mbps effective | 900 MHz 1800 Mbps effective |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR3 | DDR3 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 21.34 GB/s | 28.80 GB/s |
Render Configuration
| Shading units | 720 | 512 |
|---|---|---|
| TMUs | 36 | 32 |
| ROPs | 16 | 16 |
| Compute units | 9 | 8 |
| Cache L1 | 8 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 256 KB |
Performance
| Pixel rate | 11.20 GPixel/s | 11.20 GPixel/s |
|---|---|---|
| Texture rate | 25.20 GTexel/s | 22.40 GTexel/s |
| FP32 (float) performance | 1,008 GFLOPS | 716.8 GFLOPS |
| FP64 (double) performance | — | 44.80 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | Dual-slot | Single-slot |
|---|---|---|
| Length | 170 mm 6.7 inches | 168 mm 6.6 inches |
| TDP | 86 W | 55 W |
| Suggested PSU | 250 W | 250 W |
| Outputs | 2x DVI1x HDMI2x mini-DisplayPort | 1x DVI1x HDMI1x DisplayPort |
| Power connectors | — | None |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_1) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | — | 1.2 |
| Shader model | 5.0 | 5.1 |
