GeForce 8400 GS and GeForce 8800 GTS 640 - video card comparison
GeForce 8400 GS
GeForce 8800 GTS 640
Architecture
Tesla (2006−2010)
Tesla (2006−2010)
GPU code name
G86
G80
Market segment
Desktop
Desktop
Release date
April 2007
November 2006
Interface
PCIe 1.0 x16
PCIe 1.0 x16
Supplementary power connectors
None
1x 6-pin
SLI options
+
-
Core clock speed
459 MHz
513 MHz
Floating-point performance
29.376 gflops
228.1 gflops
Manufacturing process technology
80 nm
90 nm
Number of transistors
210 million
681 million
Pipelines / CUDA cores
16
96
Power consumption (TDP)
40 Watt
143 Watt
Texture fill rate
3.6 billion/sec
24.62
Memory type
DDR2
GDDR3
Maximum RAM amount
256 MB
640 MB
Memory bus width
64 Bit
320 Bit
Memory clock speed
800 MHz
1584 MHz
Memory bandwidth
6.4 GB/s
63.36 GB/s
Standard memory config per GPU
256 MB
-
Display Connectors
1x DVI, 1x VGA, 1x S-Video
2x DVI, 1x S-Video
DirectX
11.1 (10_0)
11.1 (10_0)
CUDA
1.1
+
OpenCL
1.1
1.1
OpenGL
2.1
3.3
Shader Model
4.0
4.0
Vulkan
N/A
N/A