Radeon HD 6850 X2 and GeForce GT 640 - video card comparison
Passmark - benchmark score Radeon HD 6850 X2 vs GeForce GT 640
Radeon HD 6850 X2
2610
GeForce GT 640
1209
Radeon HD 6850 X2
GeForce GT 640
Architecture
TeraScale 2 (2009−2015)
Kepler (2012−2018)
GPU code name
Barts
GK107
Market segment
Desktop
Desktop
Release date
September 2011
June 2012
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 8-pin
None
Core clock speed
800 MHz
902 MHz
Floating-point performance
2x 1,536.0 gflops
692.7 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,700 million
1,270 million
Pipelines / CUDA cores
960
384
Power consumption (TDP)
254 Watt
65 Watt
Texture fill rate
38.40
28.86
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
4200 MHz
1782 MHz
Memory bandwidth
134.4 GB/s
28.51 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
11.2 (11_0)
12 (11_0)
CUDA
-
3.0
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
1.1.126