GPU model | Heathrow | RV770 |
---|---|---|
GPU variant | Heathrow PRO | RV770 XT Mac (215-0669080) |
Architecture | GCN 1.0 | TeraScale |
Foundry | TSMC | TSMC |
Manufacturing process | 28 nm | 55 nm |
Number of transistors | 1,500 million | 956 million |
Die size | 123 mm² | 256 mm² |
Release date | Apr 24th, 2012 | — |
---|---|---|
Generation | London (HD 7800M) | — |
Production | End-of-life | — |
Interface | PCIe 3.0 x16 | — |
Predecessor | Vancouver | — |
Successor | Solar System | — |
GPU clock | 675 MHz | 750 MHz |
---|---|---|
Memory clock | 1000 MHz 4 Gbps effective | 850 MHz 3.4 Gbps effective |
Memory size | 2 GB | 512 MB |
---|---|---|
Memory type | GDDR5 | GDDR5 |
Memory bus width | 128 bit | 256 bit |
Bandwidth | 64.00 GB/s | 108.8 GB/s |
Shading units | 640 | 800 |
---|---|---|
TMUs | 40 | 40 |
ROPs | 16 | 16 |
Compute units | 10 | 10 |
Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
Cache L2 | 256 KB | 256 KB |
Pixel rate | 10.80 GPixel/s | 12.00 GPixel/s |
---|---|---|
Texture rate | 27.00 GTexel/s | 30.00 GTexel/s |
FP32 (float) performance | 864.0 GFLOPS | 1,200 GFLOPS |
FP64 (double) performance | 54.00 GFLOPS (1:16) | 240.0 GFLOPS (1:5) |
TDP | 40 W | 150 W |
---|---|---|
Outputs | No outputs | 1x DVI1x mini-DisplayPort |
Slot width | — | Dual-slot |
Length | — | 250 mm 9.8 inches |
Suggested PSU | — | 450 W |
Power connectors | — | 2x 6-pin |
Board number | — | B771 |
DirectX | 12 (11_1) | 10.1 (10_1) |
---|---|---|
OpenGL | 4.6 | 3.3 |
OpenCL | 1.2 | 1.1 |
Vulkan | 1.2 | — |
Shader model | 5.1 | 4.1 |
Release date | — | Jan 6th, 2009 |
---|---|---|
Generation | — | Radeon R700 |
Production | — | End-of-life |
Interface | — | PCIe 2.0 x16 |
Reviews | — | 135 in our database |
Predecessor | — | Radeon R600 |
Successor | — | Evergreen |