GeForce GTX 970 and GeForce GT 640M LE - video card comparison
Passmark - benchmark score GeForce GTX 970 vs GeForce GT 640M LE
GeForce GTX 970
9932
GeForce GT 640M LE
720
GeForce GTX 970
GeForce GT 640M LE
Architecture
Maxwell (2014−2018)
Fermi / Kepler (2012)
GPU code name
GM204
N13P-LP
Market segment
Desktop
Laptop
Release date
September 2014
March 2012
Bus support
PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Recommended system power (PSU)
500 Watt
-
Supplementary power connectors
2x 6-pins
-
SLI options
+
-
Boost clock speed
1178 MHz
-
Core clock speed
1050 MHz
Up to 500 MHz
CUDA cores
1664
Up to 384
Floating-point performance
3,920 gflops
384.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,200 million
585 million
Pipelines / CUDA cores
1664
384
Power consumption (TDP)
145 Watt
20 Watt
Maximum GPU temperature
98 °C
-
Texture fill rate
109 billion/sec
Up to 16.0 billion/sec
Memory type
GDDR5
DDR3\DDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
128bit
Memory clock speed
7.0 GB/s
1800 - 4000 MHz
Memory bandwidth
224 GB/s
Up to 28.8 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
N/A
3D Blu-Ray
-
+
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-
Optimus
-
+