GPU model | Chelsea | RV770 |
---|---|---|
GPU variant | Chelsea LE (216-0834065) | RV770 CE (215-0669093) |
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 7700M) | — |
Production | End-of-life | — |
Interface | PCIe 2.0 x16 | — |
Predecessor | Vancouver | — |
Successor | Solar System | — |
Base clock | 575 MHz | — |
---|---|---|
Boost clock | 675 MHz | — |
Memory clock | 900 MHz 1800 Mbps effective | 900 MHz 3.6 Gbps effective |
GPU clock | — | 625 MHz |
Memory size | 2 GB | 512 MB |
---|---|---|
Memory type | DDR3 | GDDR5 |
Memory bus width | 128 bit | 128 bit |
Bandwidth | 28.80 GB/s | 57.60 GB/s |
Shading units | 512 | 640 |
---|---|---|
TMUs | 32 | 32 |
ROPs | 16 | 8 |
Compute units | 8 | 8 |
Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
Cache L2 | 256 KB | 128 KB |
Pixel rate | 10.80 GPixel/s | 5.000 GPixel/s |
---|---|---|
Texture rate | 21.60 GTexel/s | 20.00 GTexel/s |
FP32 (float) performance | 691.2 GFLOPS | 800.0 GFLOPS |
FP64 (double) performance | 43.20 GFLOPS (1:16) | 160.0 GFLOPS (1:5) |
TDP | 25 W | 95 W |
---|---|---|
Outputs | No outputs | 2x DVI1x S-Video |
Slot width | — | Single-slot |
Length | — | 246 mm 9.7 inches |
Suggested PSU | — | 250 W |
Power connectors | — | 1x 6-pin |
Board number | — | B507 |
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 | — | May 28th, 2009 |
---|---|---|
Generation | — | Radeon R700 |
Production | — | End-of-life |
Interface | — | PCIe 2.0 x16 |
Predecessor | — | Radeon R600 |
Successor | — | Evergreen |