Radeon HD 4770 and GeForce GT 640 Rev. 2 - video card comparison
Radeon HD 4770
GeForce GT 640 Rev. 2
Architecture
TeraScale (2005−2013)
Kepler 2.0 (2013−2015)
GPU code name
RV740
GK208
Market segment
Desktop
Desktop
Release date
April 2009
May 2013
Interface
PCIe 2.0 x16
PCIe 2.0 x8
Supplementary power connectors
1x 6-pin
None
Core clock speed
750 MHz
1046 MHz
Floating-point performance
960.0 gflops
803.3 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
826 million
915 million
Pipelines / CUDA cores
640
384
Power consumption (TDP)
80 Watt
49 Watt
Texture fill rate
24.00
33.47
Memory type
GDDR5
GDDR5
Maximum RAM amount
512 MB
1 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
3200 MHz
5008 MHz
Memory bandwidth
51.2 GB/s
40.06 GB/s
Display Connectors
2x DVI, 1x S-Video
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
10.1 (10_1)
12 (11_0)
CUDA
-
3.5
OpenCL
1.1
1.2
OpenGL
3.3
4.6
Shader Model
4.1
5.1
Vulkan
N/A
1.1.126