GeForce GT 640M vs Radeon 550X

Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640M and Radeon 550X. 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 Radeon 550X. 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 Radeon 550X
Power consumption (TDP) 32 Watt 50 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x8
Supplementary power connectors None
Memory type DDR3\GDDR5 GDDR5
Maximum RAM amount 2 GB 2 GB
Display Connectors No outputs 1x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon 550X has 56% more power consumption, than GeForce GT 640M.
  • GeForce GT 640M is connected by PCIe 3.0 x16, and Radeon 550X uses PCIe 3.0 x8 interface.
  • GeForce GT 640M and Radeon 550X have maximum RAM of 2 GB.
  • GeForce GT 640M is used in Laptops, and Radeon 550X - in Desktops.
  • GeForce GT 640M is build with Kepler architecture, and Radeon 550X - with GCN 4.0.
  • GeForce GT 640M is manufactured by 28 nm process technology, and Radeon 550X - by 14 nm process technology.
  • Memory clock speed of Radeon 550X is 5200 MHz higher, than GeForce GT 640M.

Game benchmarks

high / 1080p 0−1 7−8
ultra / 1080p 0−1 4−5
QHD / 1440p 0−1 0−1
low / 720p 10−12 16−18
medium / 1080p 2−3 9−10
The average gaming FPS of Radeon 550X in Assassin's Creed Odyssey is 116% more, than GeForce GT 640M.

Full Specs

  GeForce GT 640M Radeon 550X
Architecture Kepler GCN 4.0
Code name N13P-GS Lexa
Type Laptop Desktop
Release date 22 March 2012 27 March 2019
Pipelines 384 512
Core clock speed 1082 MHz
Boost Clock 645 MHz 1218 MHz
Transistor count 1,270 million 2,200 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 38.98
Floating-point performance 480.0 gflops
Length 145 mm
Memory bus width 128bit 128 Bit
Memory clock speed 1800 - 4000 MHz 7000 MHz
Memory bandwidth 112.0 GB/s
Shared memory -
DirectX 12 API 12 (12_0)
Shader Model 5.1 6.4
OpenGL 4.5 4.6
OpenCL 1.1 2.0
Vulkan 1.1.126 1.2.131
CUDA +
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
Laptop size medium sized
Optimus +
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