GeForce 840A vs GeForce GTX 675M

In this comparison between GeForce 840A and GeForce GTX 675M you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce 840A will be the best choice, for others GeForce GTX 675M will be their preference. Study the comparison tables below and make your choice.

GeForce GTX 675M is a Laptop Graphics Card

Note: GeForce GTX 675M 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 GTX 675M here:

Main Specs

  GeForce 840A GeForce GTX 675M
Power consumption (TDP) 33 Watt 100 Watt
Interface PCIe 3.0 x8 MXM-B (3.0)
Memory type DDR3 GDDR5
Maximum RAM amount 2 GB 2 GB
Display Connectors No outputs No outputs
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  • GeForce GTX 675M has 203% more power consumption, than GeForce 840A.
  • GeForce 840A is connected by PCIe 3.0 x8, and GeForce GTX 675M uses MXM-B (3.0) interface.
  • GeForce 840A and GeForce GTX 675M have maximum RAM of 2 GB.
  • GeForce 840A is used in Desktops, and GeForce GTX 675M - in Laptops.
  • GeForce 840A is build with Maxwell architecture, and GeForce GTX 675M - with Fermi.
  • Core clock speed of GeForce 840A is 409 MHz higher, than GeForce GTX 675M.
  • GeForce 840A is manufactured by 28 nm process technology, and GeForce GTX 675M - by 40 nm process technology.
  • Memory clock speed of GeForce 840A is 502 MHz higher, than GeForce GTX 675M.

Game benchmarks

high / 1080p 3−4 10−11
ultra / 1080p 2−3 6−7
QHD / 1440p 0−1 0−1
low / 720p 14−16 21−24
medium / 1080p 5−6 12−14
The average gaming FPS of GeForce GTX 675M in Assassin's Creed Odyssey is 116% more, than GeForce 840A.

Full Specs

  GeForce 840A GeForce GTX 675M
Architecture Maxwell Fermi
Code name GM108 N13E-GS1
Type Desktop Laptop
Release date 17 March 2014 22 March 2012
Pipelines 384 384
Core clock speed 1029 MHz 620 MHz
Boost Clock 1124 MHz
Transistor count 1,950 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 17.98 39.7 billion/sec
Floating-point performance 863.2 gflops 952.3 gflops
Memory bus width 64 Bit 256bit
Memory clock speed 2002 MHz 1500 MHz
Memory bandwidth 16.02 GB/s 96.0 GB/s
Shared memory -
DirectX 12 (11_0) 12 API
Shader Model 5.1 5.1
OpenGL 4.6 4.5
OpenCL 1.2 1.1
Vulkan 1.1.126 N/A
CUDA 5.0 +
CUDA cores 384
Bus support PCI Express 2.0
SLI options +
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
Bitcoin / BTC (SHA256) 59 Mh/s
Laptop size large
Optimus +
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