GeForce GT 645M vs Radeon R6 Carrizo

When comparing GeForce GT 645M and Radeon R6 Carrizo, 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 645M and Radeon R6 Carrizo is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

GeForce GT 645M and Radeon R6 Carrizo are Laptop Graphics Cards

Note: GeForce GT 645M and Radeon R6 Carrizo 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 645M or Radeon R6 Carrizo here:

Main Specs

  GeForce GT 645M Radeon R6 Carrizo
Power consumption (TDP) 32 Watt 12-35 Watt
Interface PCIe 3.0 x16
Memory type DDR3\GDDR5
Maximum RAM amount 2 GB
Display Connectors No outputs
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  • GeForce GT 645M has 166% more power consumption, than Radeon R6 Carrizo.
  • Both cards are used in Laptops.
  • GeForce GT 645M is build with Kepler architecture, and Radeon R6 Carrizo - with GCN 1.2/2.0.
  • GeForce GT 645M and Radeon R6 Carrizo are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 1−2 0−1
ultra / 1080p 0−1 0−1
QHD / 1440p 0−1 0−1
low / 720p 12−14 10−12
medium / 1080p 2−3 2−3
The average gaming FPS of GeForce GT 645M in Assassin's Creed Odyssey is 16% more, than Radeon R6 Carrizo.

Full Specs

  GeForce GT 645M Radeon R6 Carrizo
Architecture Kepler GCN 1.2/2.0
Code name N13P-GS Carrizo
Type Laptop Laptop
Release date 22 March 2012 4 June 2015
Pipelines 384 384
Boost Clock 800 MHz
Transistor count 1,270 million 2410 Million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 22.7 billion/sec
Floating-point performance 544.5 gflops
Memory bus width 128bit 64/128 Bit
Memory clock speed 1800 MHz
Shared memory - +
DirectX 12 API DirectX 12 (FL 12_0)
Shader Model 5.1
OpenGL 4.5
OpenCL 1.1
Vulkan 1.1.126
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) 19 Mh/s
Laptop size medium sized medium sized
Optimus +
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