GeForce GT 640 and Radeon HD 4850 X2 - video card comparison
Passmark - benchmark score GeForce GT 640 vs Radeon HD 4850 X2
GeForce GT 640
1209
Radeon HD 4850 X2
1166
GeForce GT 640
Radeon HD 4850 X2
Architecture
Kepler (2012−2018)
TeraScale (2005−2013)
GPU code name
GK107
R700
Market segment
Desktop
Desktop
Release date
June 2012
November 2008
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
None
1x 6-pin + 1x 8-pin
Core clock speed
902 MHz
625 MHz
Floating-point performance
692.7 gflops
2x 1,000.0 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
1,270 million
956 million
Pipelines / CUDA cores
384
800
Power consumption (TDP)
65 Watt
250 Watt
Texture fill rate
28.86
25.00
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
512 MB
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
1990 MHz
Memory bandwidth
28.51 GB/s
63.68 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
4x DVI, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
10.1 (10_1)
CUDA
3.0
-
OpenCL
1.2
1.1
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
1.1.126
N/A