GeForce GT 645M vs GeForce GTX 950M

When choosing between GeForce GT 645M and GeForce GTX 950M, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce GT 645M and GeForce GTX 950M.

GeForce GT 645M and GeForce GTX 950M are Laptop Graphics Cards

Note: GeForce GT 645M and GeForce GTX 950M are only used in laptop graphics. They have lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with GeForce GT 645M or GeForce GTX 950M here:

Main Specs

  GeForce GT 645M GeForce GTX 950M
Power consumption (TDP) 32 Watt 75 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x8
Memory type DDR3\GDDR5 DDR3 or GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors No outputs No outputs
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  • GeForce GTX 950M has 134% more power consumption, than GeForce GT 645M.
  • GeForce GT 645M is connected by PCIe 3.0 x16, and GeForce GTX 950M uses PCIe 3.0 x8 interface.
  • GeForce GTX 950M has 2 GB more memory, than GeForce GT 645M.
  • Both cards are used in Laptops.
  • GeForce GT 645M is build with Kepler architecture, and GeForce GTX 950M - with Maxwell.
  • GeForce GT 645M and GeForce GTX 950M are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce GT 645M is 800 MHz higher, than GeForce GTX 950M.

Game benchmarks

high / 1080p 1−2 12−14
ultra / 1080p 0−1 8−9
QHD / 1440p 0−1 2−3
low / 720p 12−14 27−30
medium / 1080p 2−3 16−18
The average gaming FPS of GeForce GTX 950M in Assassin's Creed Odyssey is 280% more, than GeForce GT 645M.

Full Specs

  GeForce GT 645M GeForce GTX 950M
Architecture Kepler Maxwell
Code name N13P-GS N16P-GT
Type Laptop Laptop
Release date 22 March 2012 12 March 2015
Pipelines 384 640
Core clock speed 914 MHz
Boost Clock 1124 MHz
Transistor count 1,270 million 1,870 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 22.7 billion/sec 44.96
Floating-point performance 544.5 gflops 1,439 gflops
Memory bus width 128bit 128 Bit
Memory clock speed 1800 MHz 1000 or 2500 MHz
Memory bandwidth 32 or 80 GB/s
Shared memory - -
DirectX 12 API 12 (11_0)
Shader Model 5.1 5.1
OpenGL 4.5 4.5
OpenCL 1.1 1.2
Vulkan 1.1.126 1.1.126
CUDA + +
CUDA cores 384 640
Bus support PCI Express 2.0, PCI Express 3.0 PCI Express 3.0
SLI options +
HDMI + +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
Bitcoin / BTC (SHA256) 19 Mh/s 140 Mh/s
Laptop size medium sized medium sized
DisplayPort Multimode (DP++) support +
H.264, VC1, MPEG2 1080p video decoder +
Optimus + +
Ethereum / ETH (DaggerHashimoto) 2.5 Mh/s
GameStream +
GeForce ShadowPlay +
GPU Boost 2.0
GameWorks +
BatteryBoost +
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