GeForce GTX 970 and GeForce GT 645M - video card comparison
Passmark - benchmark score GeForce GTX 970 vs GeForce GT 645M
GeForce GTX 970
9932
GeForce GT 645M
957
GeForce GTX 970
GeForce GT 645M
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
GM204
N13P-GS
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 3.0 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 710 MHz
CUDA cores
1664
384
Floating-point performance
3,920 gflops
544.5 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,200 million
1,270 million
Pipelines / CUDA cores
1664
384
Power consumption (TDP)
145 Watt
32 Watt
Maximum GPU temperature
98 °C
-
Texture fill rate
109 billion/sec
22.7 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
128bit
Memory clock speed
7.0 GB/s
1800 MHz
Memory bandwidth
224 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
1.1.126
3D Blu-Ray
-
+
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-
Optimus
-
+