GeForce 8400 GS and Radeon HD 7970 X2 - video card comparison
GeForce 8400 GS
Radeon HD 7970 X2
Architecture
Tesla (2006−2010)
GCN 1.0 (2012−2020)
GPU code name
G86
New Zealand
Market segment
Desktop
Desktop
Release date
April 2007
August 2012
Interface
PCIe 1.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
3x 8-pin
SLI options
+
-
Core clock speed
459 MHz
925 MHz
Floating-point performance
29.376 gflops
2x 3,789 gflops
Manufacturing process technology
80 nm
28 nm
Number of transistors
210 million
4,313 million
Pipelines / CUDA cores
16
2048
Power consumption (TDP)
40 Watt
500 Watt
Texture fill rate
3.6 billion/sec
118.4
Memory type
DDR2
GDDR5
Maximum RAM amount
256 MB
3 GB
Memory bus width
64 Bit
384 Bit
Memory clock speed
800 MHz
5500 MHz
Memory bandwidth
6.4 GB/s
264.0 GB/s
Standard memory config per GPU
256 MB
-
Display Connectors
1x DVI, 1x VGA, 1x S-Video
1x DVI, 4x mini-DisplayPort
DirectX
11.1 (10_0)
12 (11_1)
CUDA
1.1
-
OpenCL
1.1
1.2
OpenGL
2.1
4.6
Shader Model
4.0
5.1
Vulkan
N/A
1.2.131