GeForce GT 640M vs GeForce GT 745A

Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640M and GeForce GT 745A. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce GT 640M and GeForce GT 745A. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.

GeForce GT 640M is a Laptop Graphics Card

Note: GeForce GT 640M is only used in laptop graphics. It has 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 640M here:

Main Specs

  GeForce GT 640M GeForce GT 745A
Power consumption (TDP) 32 Watt 33 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Memory type DDR3\GDDR5 DDR3
Maximum RAM amount 2 GB 2 GB
Display Connectors No outputs No outputs
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  • GeForce GT 745A has 3% more power consumption, than GeForce GT 640M.
  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • GeForce GT 640M and GeForce GT 745A have maximum RAM of 2 GB.
  • GeForce GT 640M is used in Laptops, and GeForce GT 745A - in Desktops.
  • GeForce GT 640M and GeForce GT 745A are build with Kepler architecture.
  • GeForce GT 640M and GeForce GT 745A are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce GT 640M and GeForce GT 745A is 1800 MHz.

Game benchmarks

high / 1080p 0−1 2−3
ultra / 1080p 0−1 0−1
QHD / 1440p 0−1 0−1
low / 720p 10−12 12−14
medium / 1080p 2−3 4−5
The average gaming FPS of GeForce GT 745A in Assassin's Creed Odyssey is 33% more, than GeForce GT 640M.

Full Specs

  GeForce GT 640M GeForce GT 745A
Architecture Kepler Kepler
Code name N13P-GS GK107
Type Laptop Desktop
Release date 22 March 2012 26 August 2013
Pipelines 384 384
Core clock speed 837 MHz
Boost Clock 645 MHz 915 MHz
Transistor count 1,270 million 1,270 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 29.28
Floating-point performance 480.0 gflops 642.8 gflops
Memory bus width 128bit 128 Bit
Memory clock speed 1800 - 4000 MHz 1800 MHz
Memory bandwidth 28.8 GB/s
Shared memory -
DirectX 12 API 12 (11_0)
Shader Model 5.1 5.1
OpenGL 4.5 4.6
OpenCL 1.1 1.2
Vulkan 1.1.126 1.1.126
CUDA + 3.0
CUDA cores 384
Bus support PCI Express 2.0, PCI Express 3.0
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
Bitcoin / BTC (SHA256) 18 Mh/s 26 Mh/s
Laptop size medium sized
Optimus +
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