Radeon HD 7660G and GeForce GT 640 Rev. 2 - video card comparison
Radeon HD 7660G
GeForce GT 640 Rev. 2
Architecture
Terascale 3 (2010−2013)
Kepler 2.0 (2013−2015)
GPU code name
Trinity
GK208
Market segment
Laptop
Desktop
Release date
May 2012
May 2013
Interface
IGP
PCIe 2.0 x8
Supplementary power connectors
-
None
Boost clock speed
686 MHz
-
Core clock speed
497 MHz
1046 MHz
Floating-point performance
-
803.3 gflops
Manufacturing process technology
32 nm
28 nm
Number of transistors
1.3 Million
915 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
35 Watt
49 Watt
Texture fill rate
16.46
33.47
Memory type
System Shared
GDDR5
Maximum RAM amount
System Shared
1 GB
Memory bus width
System Shared
64 Bit
Memory clock speed
System Shared
5008 MHz
Memory bandwidth
-
40.06 GB/s
Shared memory
+
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
11.2 (11_0)
12 (11_0)
CUDA
-
3.5
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
1.1.126