Radeon HD 4870 X2
General
ManufacturerATI
SeriesRadeon R700(HD 4800)
GPU NameR700
ArchitectureTeraScale
GenerationRadeon R700(HD 4800)
Release DateAug 2008
Bus InterfacePCIe 2.0 x16
Process & Die
FoundryTSMC
Process Size55 nm
Transistors956 M
Transistor Density3,700 K/mm²
Die Size256 mm²
Clock Speeds
Base Clock750 MHz
Boost Clock750 MHz
Memory
VRAM1 GB
Memory TypeGDDR5
Memory Clock900 MHz
Memory Bus256-bit
Bandwidth115.2 GB/s
Processing Units
Shading Units800
TMUs40
ROPs16
SMs0
Tensor Cores0
RT Cores0
Cache
L1 Cache16 KB
L2 Cache0.25 MB
Power & Thermals
TDP286 W
Suggested PSU600 W
Power Connectors1x 6-pin + 1x 8-pin
Dimensions
Board Length267 mm
Board Width111 mm
Outputs
Display Connectors2x DVI, 1x S-Video
API Support
DirectX10.1
OpenGL3.3
OpenCL1.1
Shader Model4.1
Theoretical Performance
Pixel Rate12 GP/s
Texture Rate30 GT/s
FP32 (Single)1,200 GFLOPS
FP64 (Double)240 GFLOPS
External
TechPowerUpView →
Other Radeon R700(HD 4800) Models