GeForce GT 640 and Graphics Xpression ISA - video card comparison
GeForce GT 640
Graphics Xpression ISA
Architecture
Kepler (2012−2018)
Mach (1992−1997)
GPU code name
GK107
Mach64
Market segment
Desktop
Desktop
Release date
June 2012
1995
Interface
PCIe 3.0 x16
PCI
Supplementary power connectors
None
-
Core clock speed
902 MHz
40 MHz
Floating-point performance
692.7 gflops
-
Manufacturing process technology
28 nm
600 nm
Number of transistors
1,270 million
1 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
65 Watt
-
Texture fill rate
28.86
-
Memory type
DDR3
DRAM
Maximum RAM amount
2 GB
2 MB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1782 MHz
40 MHz
Memory bandwidth
28.51 GB/s
320.0 MB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x VGA
HDMI
+
-
DirectX
12 (11_0)
N/A
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
N/A
Shader Model
5.1
-
Vulkan
1.1.126
N/A