ATI Mobility Radeon HD 4870 X2 Full Specs
1,600 Shaders 550MHz |
2GB GDDR5179.2GB/s |
·· 1.76 TFLOPS |
Form Factor MXM-A |
Clock Speed ·· |
Peak OPS 1.76 TFLOPSFP32 |
FP32 1.76 TFLOPS |
FP64 352 GFLOPS |
Pixel Rate 8.8 GPixel/s |
Texture Rate 22 GTexel/s |
Shaders 1,600 Shaders |
TMUs 80 TMUs |
ROPs 32 ROPs |
CUs 20 CUs |
Boost Clock 550MHz |
L1 16KB/CU |
L2 Cache 256KB shared |
2GB GDDR5 |
Memory Bus 256-bit |
Memory Speed 2.8GT/s |
Memory Bandwidth 179.2GB/s |
ECC No |
Max Resolution 2560x1600 |
Refresh Rate Calculator 2560x1440 Resolution1440p QHD Refresh Rate 66Hz |
Multi-Monitor 2 |
DSC Not Supported |
Shader Model 4.1 |
DirectX DirectX 10Direct3D 10_1 |
OpenGL 3.3OpenCL 1.1 |
GFX 3 |
Decoder UVD 2.0 |
Codec VC-1 AVC (H.264) |
Form Factor MXM-A |
PCIe PCIe 2.0 x16 |
Multi-GPU Multi-GPU Support SupportedMulti-GPU Type 2-way CrossFireX |
Manufacturer |
Chip Designer |
Architecture |
Family |
Branding  |
Codename Wekiva |
Chip Variant RV770 CE |
Market Segment Laptop |
Release Date Jan 9, 2009 |
Foundry TSMC |
Fabrication Node 55nm |
Die Size 256mm² |
Transistor Count 956M |
Transistor Density 3.73 MTr/mm² |