GeForce GTX 260 and GeForce GT 640 Rev. 2 - video card comparison
GeForce GTX 260
GeForce GT 640 Rev. 2
Architecture
Tesla 2.0 (2007−2013)
Kepler 2.0 (2013−2015)
GPU code name
GT200
GK208
Market segment
Desktop
Desktop
Release date
June 2008
May 2013
Interface
PCIe 2.0 x16
PCIe 2.0 x8
Supplementary power connectors
2x 6-pin
None
SLI options
+
-
Core clock speed
576 MHz
1046 MHz
CUDA cores
192
-
Floating-point performance
476.9 gflops
803.3 gflops
Manufacturing process technology
65 nm
28 nm
Number of transistors
1,400 million
915 million
Pipelines / CUDA cores
192
384
Power consumption (TDP)
182 Watt
49 Watt
Maximum GPU temperature
105 °C
-
Texture fill rate
36.9 billion/sec
33.47
Memory type
GDDR3
GDDR5
Maximum RAM amount
896 MB
1 GB
Memory bus width
448 Bit
64 Bit
Memory clock speed
999 MHz
5008 MHz
Memory bandwidth
111.9 GB/s
40.06 GB/s
Display Connectors
Dual Link DVIHDTV
1x DVI, 1x HDMI, 1x VGA
Multi monitor support
+
-
HDMI
+
+
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
S/PDIF
-
DirectX
11.1 (10_0)
12 (11_0)
CUDA
+
3.5
OpenCL
1.1
1.2
OpenGL
2.1
4.6
Shader Model
4.0
5.1
Vulkan
N/A
1.1.126