GeForce 8400 GS and Radeon R9 255 OEM - video card comparison
GeForce 8400 GS
Radeon R9 255 OEM
Architecture
Tesla (2006−2010)
GCN 1.0 (2012−2020)
GPU code name
G86
Cape Verde
Market segment
Desktop
Desktop
Release date
April 2007
December 2013
Interface
PCIe 1.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
1x 6-pin
SLI options
+
-
Boost clock speed
-
930 MHz
Core clock speed
459 MHz
900 MHz
Floating-point performance
29.376 gflops
952.3 gflops
Manufacturing process technology
80 nm
28 nm
Number of transistors
210 million
1,500 million
Pipelines / CUDA cores
16
512
Power consumption (TDP)
40 Watt
65 Watt
Texture fill rate
3.6 billion/sec
29.76
Memory type
DDR2
GDDR5
Maximum RAM amount
256 MB
2 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
800 MHz
4600 MHz
Memory bandwidth
6.4 GB/s
73.6 GB/s
Standard memory config per GPU
256 MB
-
Display Connectors
1x DVI, 1x VGA, 1x S-Video
No outputs
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