Radeon HD 4870 and GeForce 8800 GTS 640 - video card comparison
Radeon HD 4870
GeForce 8800 GTS 640
Architecture
TeraScale (2005−2013)
Tesla (2006−2010)
GPU code name
RV770
G80
Market segment
Desktop
Desktop
Release date
June 2008
November 2006
Interface
PCIe 2.0 x16
PCIe 1.0 x16
Supplementary power connectors
2x 6-pin
1x 6-pin
Core clock speed
750 MHz
513 MHz
Floating-point performance
1,200.0 gflops
228.1 gflops
Manufacturing process technology
55 nm
90 nm
Number of transistors
956 million
681 million
Pipelines / CUDA cores
800
96
Power consumption (TDP)
150 Watt
143 Watt
Texture fill rate
30.00
24.62
Memory type
GDDR5
GDDR3
Maximum RAM amount
1 GB
640 MB
Memory bus width
256 Bit
320 Bit
Memory clock speed
3600 MHz
1584 MHz
Memory bandwidth
115.2 GB/s
63.36 GB/s
Display Connectors
2x DVI, 1x S-Video
2x DVI, 1x S-Video
DirectX
10.1 (10_1)
11.1 (10_0)
CUDA
-
+
OpenCL
1.1
1.1
OpenGL
3.3
3.3
Shader Model
4.1
4.0
Vulkan
N/A
N/A