GeForce GTX 960 and GeForce GT 640M - video card comparison
Passmark - benchmark score GeForce GTX 960 vs GeForce GT 640M
GeForce GTX 960
6254
GeForce GT 640M
946
GeForce GTX 960
GeForce GT 640M
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
GM206
N13P-GS
Market segment
Desktop
Laptop
Release date
January 2015
March 2012
Bus support
PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Recommended system power (PSU)
400 Watt
-
Supplementary power connectors
1x 6-pins
-
SLI options
+
-
Boost clock speed
1178 MHz
645 MHz
Core clock speed
1127 MHz
Up to 625 MHz
CUDA cores
1024
384
Floating-point performance
2,413 gflops
480.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,940 million
1,270 million
Pipelines / CUDA cores
1024
384
Power consumption (TDP)
120 Watt
32 Watt
Texture fill rate
72 billion/sec
Up to 20.0 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
128 Bit
128bit
Memory clock speed
7.0 GB/s
1800 - 4000 MHz
Memory bandwidth
112 GB/s
Up to 64.0 GB/s
Shared memory
-
-
Display Connectors
Dual Link DVI-I, HDMI 2.0, 3x DisplayPort 1.2
No outputs
Multi monitor support
4 displays
-
HDMI
+
+
HDCP
+
+
Maximum VGA resolution
2048x1536
Up to 2048x1536
G-SYNC support
+
-
Audio input for HDMI
Internal
-
DirectX
12 (12_1)
12 API
CUDA
+
+
OpenCL
1.2
1.1
OpenGL
4.4
4.5
Shader Model
6.4
5.1
Vulkan
+
1.1.126
3D Blu-Ray
-
+
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-
Optimus
-
+