GeForce GT 640M LE vs Radeon R7 512 Cores Kaveri

When comparing GeForce GT 640M LE and Radeon R7 512 Cores Kaveri, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce GT 640M LE and Radeon R7 512 Cores Kaveri is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
Radeon R7 512 Cores Kaveri

GeForce GT 640M LE is a Laptop Graphics Card

Note: GeForce GT 640M LE 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 LE here:

Main Specs

  GeForce GT 640M LE Radeon R7 512 Cores Kaveri
Power consumption (TDP) 20 Watt
Interface PCIe 2.0 x16
Memory type DDR3\DDR5
Maximum RAM amount 2 GB
Display Connectors No outputs
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  • GeForce GT 640M LE is used in Laptops, and Radeon R7 512 Cores Kaveri - in Desktops.
  • GeForce GT 640M LE is build with Fermi / Kepler architecture, and Radeon R7 512 Cores Kaveri - with GCN.
  • GeForce GT 640M LE and Radeon R7 512 Cores Kaveri are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 0−1 7−8
ultra / 1080p 4−5
QHD / 1440p 0−1 0−1
low / 720p 1−2 18−20
medium / 1080p 0−1 9−10
The average gaming FPS of Radeon R7 512 Cores Kaveri in Assassin's Creed Odyssey is 1800% more, than GeForce GT 640M LE.

Full Specs

  GeForce GT 640M LE Radeon R7 512 Cores Kaveri
Architecture Fermi / Kepler GCN
Code name N13P-LP Kaveri Spectre
Type Laptop Desktop
Release date 22 March 2012 14 January 2014
Pipelines 384 512
Core clock speed 720 MHz
Transistor count 585 million
Manufacturing process technology 28 nm 28 nm
Floating-point performance 384.0 gflops
Memory bus width 128bit
Memory clock speed 1800 - 4000 MHz
Shared memory - +
DirectX 12 API DirectX 12 (FL 12_0), Shader 5.2
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
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
Bitcoin / BTC (SHA256) 14 Mh/s
Laptop size medium sized
Optimus +
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