GeForce GT 640 and Radeon HD 7690M XT Rebrand - video card comparison
GeForce GT 640
Radeon HD 7690M XT Rebrand
Architecture
Kepler (2012−2018)
TeraScale 2 (2009−2015)
GPU code name
GK107
Whistler
Market segment
Desktop
Desktop
Release date
June 2012
January 2012
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
None
-
Core clock speed
902 MHz
725 MHz
Floating-point performance
692.7 gflops
696.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
716 million
Pipelines / CUDA cores
384
480
Power consumption (TDP)
65 Watt
25 Watt
Texture fill rate
28.86
17.40
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
1782 MHz
3200 MHz
Memory bandwidth
28.51 GB/s
51.2 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
HDMI
+
-
DirectX
12 (11_0)
11.2 (11_0)
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
1.1.126
N/A