GeForce GT 640 and Radeon HD 2900 XT - video card comparison
Passmark - benchmark score GeForce GT 640 vs Radeon HD 2900 XT
GeForce GT 640
1209
Radeon HD 2900 XT
679
GeForce GT 640
Radeon HD 2900 XT
Architecture
Kepler (2012−2018)
TeraScale (2005−2013)
GPU code name
GK107
R600
Market segment
Desktop
Desktop
Release date
June 2012
May 2007
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
None
1x 6-pin + 1x 8-pin
Core clock speed
902 MHz
743 MHz
Floating-point performance
692.7 gflops
475.5 gflops
Manufacturing process technology
28 nm
80 nm
Number of transistors
1,270 million
720 million
Pipelines / CUDA cores
384
320
Power consumption (TDP)
65 Watt
215 Watt
Texture fill rate
28.86
11.89
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
512 MB
Memory bus width
128 Bit
512 Bit
Memory clock speed
1782 MHz
1656 MHz
Memory bandwidth
28.51 GB/s
106.0 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
10.0 (10_0)
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
3.3
Shader Model
5.1
4.0
Vulkan
1.1.126
N/A