Architecture
ATI VLIW5 TeraScale 55nm
Most Powerful Variant
RV770 PRO
Cores : TMUs : ROPs
800 : 40 : 16
Typical Memory Size
512 MB
Typical Memory Bus
256 -bit
RV770 GPU
Overview
Manufacturer
AMD
Release Date
June 25th, 2008
Graphics Processing Unit
Architecture
ATI VLIW5 TeraScale
Fabrication Process
55 nm
Die Size
256 mm2
Transistors Count
956M
Stream Cores
800
TMUs
40
ROPs
16
Clocks
Base Clock
750 MHz
Memory Configuration
Memory Size
512 MB
Memory Type
GDDR3
Memory Bus Width
256-bit
Memory Bandwidth
57.6 GB/s
Performance
Pixel Fillrate
12 GPixels/s
Texture Fillrate
30 GTexel/s
SPFP Performance
1.2 TFLOPS
Performance per W
8 GFLOPS/W
Performance per mm2
4.7 GFLOPS/mm2
Physical
Interface
PCI-Express 2.0 x16
Typical Thermal Design Power
150 W
CrossFire Support
3-way
API Support
DirectX
10.1
Vulkan
-
OpenGL
3.3
OpenCL
1.2
| Model | GPU Model | Unified Cores | Boost Clock | Memory Clock | Memory Config. | |
|---|---|---|---|---|---|---|
 | ATI Radeon HD 4870 X2 | RV770 XT | - | |||
| | ATI Radeon HD 4850 X2 | RV770 XT | - | |||
 | ATI Radeon HD 4870 | RV770 PRO | - | |||
 | ATI Radeon HD 4850 | RV770 PRO | - | |||
 | ATI Radeon HD 4730 | RV770 CE | - | |||
| | ATI Radeon HD 4830 | RV770 LE | - |
