GeForce GT 640M LE vs GeForce GTX 770M SLI

When choosing between GeForce GT 640M LE and GeForce GTX 770M SLI, 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 640M LE and GeForce GTX 770M SLI.

GeForce GT 640M LE and GeForce GTX 770M SLI are Laptop Graphics Cards

Note: GeForce GT 640M LE and GeForce GTX 770M SLI 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 640M LE or GeForce GTX 770M SLI here:

Main Specs

  GeForce GT 640M LE GeForce GTX 770M SLI
Power consumption (TDP) 20 Watt 150 Watt
Interface PCIe 2.0 x16
Memory type DDR3\DDR5 GDDR5
Maximum RAM amount 2 GB 2x 3 GB
Display Connectors No outputs
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  • GeForce GTX 770M SLI has 650% more power consumption, than GeForce GT 640M LE.
  • GeForce GT 640M LE and GeForce GTX 770M SLI have maximum RAM of 2 GB.
  • Both cards are used in Laptops.
  • GeForce GT 640M LE is build with Fermi / Kepler architecture, and GeForce GTX 770M SLI - with Kepler.
  • GeForce GT 640M LE and GeForce GTX 770M SLI are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce GTX 770M SLI is 2200 MHz higher, than GeForce GT 640M LE.

Game benchmarks

high / 1080p 0−1 24−27
ultra / 1080p 14−16
QHD / 1440p 0−1 10−11
4K / 2160p 6−7
low / 720p 1−2 45−50
medium / 1080p 0−1 30−35
The average gaming FPS of GeForce GTX 770M SLI in Assassin's Creed Odyssey is 4600% more, than GeForce GT 640M LE.

Full Specs

  GeForce GT 640M LE GeForce GTX 770M SLI
Architecture Fermi / Kepler Kepler
Code name N13P-LP
Type Laptop Laptop
Release date 22 March 2012 30 May 2013
Pipelines 384 1920
Core clock speed 811 MHz
Transistor count 585 million 2x 2540 Million
Manufacturing process technology 28 nm 28 nm
Floating-point performance 384.0 gflops
Memory bus width 128bit 2x 192 Bit
Memory clock speed 1800 - 4000 MHz 4000 MHz
Shared memory - -
DirectX 12 API DirectX 11, Shader 5.0
Shader Model 5.1
OpenGL 4.5
OpenCL 1.1
Vulkan N/A
CUDA + +
CUDA cores Up to 384
Bus support PCI Express 2.0, PCI Express 3.0
SLI options +
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
Bitcoin / BTC (SHA256) 14 Mh/s
Laptop size medium sized large
Optimus + +
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