Radeon HD 7660G and GeForce GT 640 OEM - video card comparison
Radeon HD 7660G
GeForce GT 640 OEM
Architecture
Terascale 3 (2010−2013)
Kepler (2012−2018)
GPU code name
Trinity
GK107
Market segment
Laptop
Desktop
Release date
May 2012
April 2012
Interface
IGP
PCIe 3.0 x16
Supplementary power connectors
-
None
Boost clock speed
686 MHz
-
Core clock speed
497 MHz
797 MHz
Floating-point performance
-
612.1 gflops
Manufacturing process technology
32 nm
28 nm
Number of transistors
1.3 Million
1,270 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
35 Watt
50 Watt
Texture fill rate
16.46
25.50
Memory type
System Shared
DDR3
Maximum RAM amount
System Shared
2 GB
Memory bus width
System Shared
128 Bit
Memory clock speed
System Shared
1782 MHz
Memory bandwidth
-
28.51 GB/s
Shared memory
+
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
-
+
DirectX
11.2 (11_0)
12 (11_0)
CUDA
-
3.0
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
1.1.126