GeForce GTX 950 and GeForce GT 640 OEM - video card comparison
GeForce GTX 950
GeForce GT 640 OEM
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
GM206
GK107
Market segment
Desktop
Desktop
Release date
August 2015
April 2012
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Recommended system power (PSU)
350 Watt
-
Supplementary power connectors
1x 6-pins
None
SLI options
+
-
Boost clock speed
1188 MHz
-
Core clock speed
1024 MHz
797 MHz
CUDA cores
768
-
Floating-point performance
1,825 gflops
612.1 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,940 million
1,270 million
Pipelines / CUDA cores
768
384
Power consumption (TDP)
90 Watt
50 Watt
Texture fill rate
49.2 billion/sec
25.50
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
6.6 GB/s
1782 MHz
Memory bandwidth
105.6 GB/s
28.51 GB/s
Shared memory
-
-
Display Connectors
Dual Link DVI-I, HDMI 2.0, 3x DisplayPort 1.2
1x DVI, 1x HDMI, 1x DisplayPort
Multi monitor support
4 displays
-
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
2048x1536
-
G-SYNC support
+
-
Audio input for HDMI
Internal
-
DirectX
12 (12_1)
12 (11_0)
CUDA
+
3.0
OpenCL
1.2
1.2
OpenGL
4.5
4.6
Shader Model
6.4
5.1
Vulkan
1.1.126
1.1.126
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-