GeForce GT 645M vs Quadro M4000

If you are going to buy a new graphics card and are choosing between GeForce GT 645M and Quadro M4000, 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 Quadro M4000, 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 Quadro M4000
Power consumption (TDP) 32 Watt 120 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Supplementary power connectors 1 x 6-pin
Memory type DDR3\GDDR5 GDDR5
Maximum RAM amount 2 GB 8 GB
Display Connectors No outputs 4x DisplayPort
  Check Price Check Price
  • Quadro M4000 has 275% more power consumption, than GeForce GT 645M.
  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • Quadro M4000 has 6 GB more memory, than GeForce GT 645M.
  • GeForce GT 645M is used in Laptops, and Quadro M4000 - in Desktops.
  • GeForce GT 645M is build with Kepler architecture, and Quadro M4000 - with Maxwell 2.0.
  • GeForce GT 645M and Quadro M4000 are manufactured by 28 nm process technology.
  • Memory clock speed of Quadro M4000 is 4208 MHz higher, than GeForce GT 645M.

Game benchmarks

high / 1080p 1−2 35−40
ultra / 1080p 0−1 21−24
QHD / 1440p 0−1 16−18
4K / 2160p 10−11
low / 720p 12−14 60−65
medium / 1080p 2−3 40−45
The average gaming FPS of Quadro M4000 in Assassin's Creed Odyssey is 840% more, than GeForce GT 645M.

Full Specs

  GeForce GT 645M Quadro M4000
Architecture Kepler Maxwell 2.0
Code name N13P-GS GM204
Type Laptop Workstation
Release date 22 March 2012 29 June 2015
Pipelines 384 1664
Core clock speed 773 MHz
Transistor count 1,270 million 5,200 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 22.7 billion/sec 80.39
Floating-point performance 544.5 gflops 2,573 gflops
Length 241 mm
Memory bus width 128bit 256 Bit
Memory clock speed 1800 MHz 6008 MHz
Shared memory -
DirectX 12 API 12
Shader Model 5.1 5
OpenGL 4.5 4.5
OpenCL 1.1 1.2
Vulkan 1.1.126 +
CUDA + 5.2
CUDA cores 384
Bus support PCI Express 2.0, PCI Express 3.0
SLI options +
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
Bitcoin / BTC (SHA256) 19 Mh/s 299 Mh/s
Laptop size medium sized
Optimus +
3D Vision Pro +
Mosaic +
Width 1" (2.5 cm)
Number of simultaneous displays 4
nView Desktop Management +
Multi-display synchronization Quadro Sync
High-Performance Video I/O6 +
  Check Price Check Price