GeForce GT 645M vs GeForce GTX 550 Ti

If you are going to buy a new graphics card and are choosing between GeForce GT 645M and GeForce GTX 550 Ti, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce GT 645M stacks up against GeForce GTX 550 Ti, check out specs charts below.

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 GeForce GTX 550 Ti
Power consumption (TDP) 32 Watt 116 Watt
Interface PCIe 3.0 x16 PCIe 2.0 x16
Supplementary power connectors One 6-pin
Memory type DDR3\GDDR5 GDDR5
Maximum RAM amount 2 GB 1 GB
Display Connectors No outputs 2x DVI, 1x mini-HDMI
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  • GeForce GTX 550 Ti has 262% more power consumption, than GeForce GT 645M.
  • GeForce GT 645M is connected by PCIe 3.0 x16, and GeForce GTX 550 Ti uses PCIe 2.0 x16 interface.
  • GeForce GT 645M has 1 GB more memory, than GeForce GTX 550 Ti.
  • GeForce GT 645M is used in Laptops, and GeForce GTX 550 Ti - in Desktops.
  • GeForce GT 645M is build with Kepler architecture, and GeForce GTX 550 Ti - with Fermi.
  • GeForce GT 645M is manufactured by 28 nm process technology, and GeForce GTX 550 Ti - by 40 nm process technology.
  • Memory clock speed of GeForce GT 645M is 1796 MHz higher, than GeForce GTX 550 Ti.

Game benchmarks

high / 1080p 1−2 7−8
ultra / 1080p 0−1 4−5
QHD / 1440p 0−1 0−1
low / 720p 12−14 18−20
medium / 1080p 2−3 9−10
The average gaming FPS of GeForce GTX 550 Ti in Assassin's Creed Odyssey is 140% more, than GeForce GT 645M.

Full Specs

  GeForce GT 645M GeForce GTX 550 Ti
Architecture Kepler Fermi
Code name N13P-GS GF116
Type Laptop Desktop
Release date 22 March 2012 15 March 2011
Pipelines 384 192
Core clock speed 900 MHz
Transistor count 1,270 million 1,170 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 22.7 billion/sec 28.8 billion/sec
Floating-point performance 544.5 gflops 691.2 gflops
Length 8.25" (21 cm)
Memory bus width 128bit 192 Bit
Memory clock speed 1800 MHz 4.1 GB/s
Memory bandwidth 98.4 GB/s
Shared memory -
DirectX 12 API 12 (11_0)
Shader Model 5.1 5.1
OpenGL 4.5 4.2
OpenCL 1.1 1.1
Vulkan 1.1.126 N/A
CUDA + +
CUDA cores 384 192
Bus support PCI Express 2.0, PCI Express 3.0 16x PCI-E 2.0
Height 4.376" (11.1 cm)
SLI options +
Multi monitor support +
HDMI + +
HDCP +
Maximum VGA resolution Up to 2048x1536 2048x1536
Audio input for HDMI Internal
3D Blu-Ray +
Bitcoin / BTC (SHA256) 19 Mh/s 44 Mh/s
Laptop size medium sized
Optimus +
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