GeForce GT 645M vs Radeon HD 6970

When comparing GeForce GT 645M and Radeon HD 6970, 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 HD 6970 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

GeForce GT 645M is a Laptop Graphics Card

Note: GeForce GT 645M 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 645M here:

Main Specs

  GeForce GT 645M Radeon HD 6970
Power consumption (TDP) 32 Watt 550 Watt
Interface PCIe 3.0 x16 PCIe 2.0 x16
Supplementary power connectors 1x 6-pin + 1x 8-pin
Memory type DDR3\GDDR5 DDR5
Maximum RAM amount 2 GB 2 GB
Display Connectors No outputs 2x DVI, 1x HDMI, 2x mini-DisplayPort
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  • Radeon HD 6970 has 1618% more power consumption, than GeForce GT 645M.
  • GeForce GT 645M is connected by PCIe 3.0 x16, and Radeon HD 6970 uses PCIe 2.0 x16 interface.
  • GeForce GT 645M and Radeon HD 6970 have maximum RAM of 2 GB.
  • GeForce GT 645M is used in Laptops, and Radeon HD 6970 - in Desktops.
  • GeForce GT 645M is build with Kepler architecture, and Radeon HD 6970 - with Terascale 2.
  • GeForce GT 645M is manufactured by 28 nm process technology, and Radeon HD 6970 - by 40 nm process technology.
  • Memory clock speed of GeForce GT 645M is 425 MHz higher, than Radeon HD 6970.

Game benchmarks

high / 1080p 1−2 14−16
ultra / 1080p 0−1 9−10
QHD / 1440p 0−1 3−4
low / 720p 12−14 30−35
medium / 1080p 2−3 18−20
The average gaming FPS of Radeon HD 6970 in Assassin's Creed Odyssey is 340% more, than GeForce GT 645M.

Full Specs

  GeForce GT 645M Radeon HD 6970
Architecture Kepler Terascale 2
Code name N13P-GS Cayman
Type Laptop Desktop
Release date 22 March 2012 14 December 2010
Pipelines 384 1536
Boost Clock 880 MHz
Transistor count 1,270 million 2,640 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 22.7 billion/sec 84.48
Floating-point performance 544.5 gflops 2,703.4 gflops
Length 267 mm
Memory bus width 128bit 256 Bit
Memory clock speed 1800 MHz 1375 MHz
Shared memory -
DirectX 12 API
Shader Model 5.1 5.0
OpenGL 4.5 4.4
OpenCL 1.1 1.2
Vulkan 1.1.126
CUDA +
CUDA cores 384
Bus support PCI Express 2.0, PCI Express 3.0 PCIe 2.0 x16
HDMI + +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
Bitcoin / BTC (SHA256) 19 Mh/s 273 Mh/s
Laptop size medium sized
Optimus +
Eyefinity +
Design reference
CrossFire +
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