Nom du GPU | RV770 | Heathrow |
---|---|---|
GPU variant | RV770 XT | Heathrow PRO |
Architecture | TeraScale | GCN 1.0 |
Fonderie | TSMC | TSMC |
Taille du processus | 55 nm | 28 nm |
Transistors | 956 million | 1,500 million |
Taille des matrices | 256 mm² | 123 mm² |
Date de publication | Nov 13th, 2008 | — |
---|---|---|
Génération | FireStream | — |
Production | End-of-life | — |
Bus interface | PCIe 2.0 x16 | — |
GPU clock | 750 MHz | 675 MHz |
---|---|---|
Mémoire clock | 900 MHz 3.6 Gbps effective | 1000 MHz 4 Gbps effective |
Taille de la mémoire | 2 GB | 2 GB |
---|---|---|
Type de mémoire | GDDR5 | GDDR5 |
Bus mémoire | 256 bit | 128 bit |
Bande passante | 115.2 GB/s | 64.00 GB/s |
Shading units | 800 | 640 |
---|---|---|
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 |
Taux de pixel | 12.00 GPixel/s | 10.80 GPixel/s |
---|---|---|
Taux de texture | 30.00 GTexel/s | 27.00 GTexel/s |
FP32 (float) performance | 1,200 GFLOPS | 864.0 GFLOPS |
FP64 (double) performance | 240.0 GFLOPS (1:5) | 54.00 GFLOPS (1:16) |
Taille Slot | Dual-slot | — |
---|---|---|
Longueur | 241 mm 9.5 inches | — |
Taille | 111 mm 4.4 inches | — |
Taille | 38 mm 1.5 inches | — |
TDP | 160 W | 40 W |
Suggestions pour le PSU | 450 W | — |
Sorties | 1x DVI | No outputs |
Connecteurs de puissance | 2x 6-pin | — |
DirectX | 10.1 (10_1) | 12 (11_1) |
---|---|---|
OpenGL | 3.3 | 4.6 |
OpenCL | 1.1 | 1.2 |
Vulkan | — | 1.2 |
Shader model | 4.1 | 5.1 |
Date de publication | — | Apr 24th, 2012 |
---|---|---|
Génération | — | London (HD 7800M) |
Production | — | End-of-life |
Bus interface | — | PCIe 3.0 x16 |
Prédécesseur | — | Vancouver |
Successeur | — | Solar System |