GeForce GT 640 and Radeon HD 6450 GDDR5 - video card comparison
GeForce GT 640
Radeon HD 6450 GDDR5
Architecture
Kepler (2012−2018)
Terascale 2 (2009−2015)
GPU code name
GK107
Caicos
Market segment
Desktop
Desktop
Release date
June 2012
April 2011
Interface
PCIe 3.0 x16
-
Supplementary power connectors
None
-
Core clock speed
902 MHz
750 MHz
Floating-point performance
692.7 gflops
-
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
-
Pipelines / CUDA cores
384
160
Power consumption (TDP)
65 Watt
27 Watt
Texture fill rate
28.86
-
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1782 MHz
900 MHz
Memory bandwidth
28.51 GB/s
-
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
-
HDMI
+
-
DirectX
12 (11_0)
11
CUDA
3.0
-
OpenCL
1.2
-
OpenGL
4.6
-
Shader Model
5.1
-
Vulkan
1.1.126
-