GeForce GT 640M vs Radeon HD 6550A

Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640M and Radeon HD 6550A. 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 HD 6550A. 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 HD 6550A
Power consumption (TDP) 32 Watt 35 Watt
Interface PCIe 3.0 x16 MXM-A (3.0)
Memory type DDR3\GDDR5 GDDR3
Maximum RAM amount 2 GB 2 GB
Display Connectors No outputs No outputs
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  • Radeon HD 6550A has 9% more power consumption, than GeForce GT 640M.
  • GeForce GT 640M is connected by PCIe 3.0 x16, and Radeon HD 6550A uses MXM-A (3.0) interface.
  • GeForce GT 640M and Radeon HD 6550A have maximum RAM of 2 GB.
  • GeForce GT 640M is used in Laptops, and Radeon HD 6550A - in Desktops.
  • GeForce GT 640M is build with Kepler architecture, and Radeon HD 6550A - with TeraScale 2.
  • GeForce GT 640M is manufactured by 28 nm process technology, and Radeon HD 6550A - by 40 nm process technology.
  • Memory clock speed of GeForce GT 640M is 200 MHz higher, than Radeon HD 6550A.

Game benchmarks

high / 1080p 0−1 0−1
ultra / 1080p 0−1
QHD / 1440p 0−1 0−1
low / 720p 10−12 1−2
medium / 1080p 2−3 0−1
The average gaming FPS of GeForce GT 640M in Assassin's Creed Odyssey is 1000% more, than Radeon HD 6550A.

Full Specs

  GeForce GT 640M Radeon HD 6550A
Architecture Kepler TeraScale 2
Code name N13P-GS Pinewood
Type Laptop Desktop
Release date 22 March 2012 7 February 2011
Pipelines 384 480
Core clock speed 550 MHz
Boost Clock 645 MHz
Transistor count 1,270 million 627 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 13.20
Floating-point performance 480.0 gflops 624.0 gflops
Memory bus width 128bit 128 Bit
Memory clock speed 1800 - 4000 MHz 1600 MHz
Memory bandwidth 25.6 GB/s
Shared memory -
DirectX 12 API 11.2 (11_0)
Shader Model 5.1 5.0
OpenGL 4.5 4.4
OpenCL 1.1 1.2
Vulkan 1.1.126 N/A
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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