GeForce 840M vs GRID K520

Find out if it is worth upgrading your current GPU setup by comparing GeForce 840M and GRID K520. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce 840M and GRID K520. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.

GeForce 840M is a Laptop Graphics Card

Note: GeForce 840M 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 840M here:

Main Specs

  GeForce 840M GRID K520
Power consumption (TDP) 33 Watt 225 Watt
Interface PCIe 3.0 x8 PCIe 3.0 x16
Supplementary power connectors 1x 8-pin
Memory type DDR3 GDDR5
Maximum RAM amount 4 GB 4 GB
Display Connectors No outputs No outputs
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  • GRID K520 has 581% more power consumption, than GeForce 840M.
  • GeForce 840M is connected by PCIe 3.0 x8, and GRID K520 uses PCIe 3.0 x16 interface.
  • GeForce 840M and GRID K520 have maximum RAM of 4 GB.
  • GeForce 840M is used in Laptops, and GRID K520 - in Desktops.
  • GeForce 840M is build with Maxwell architecture, and GRID K520 - with Kepler.
  • Core clock speed of GeForce 840M is 284 MHz higher, than GRID K520.
  • GeForce 840M and GRID K520 are manufactured by 28 nm process technology.
  • Memory clock speed of GRID K520 is 3000 MHz higher, than GeForce 840M.

Game benchmarks

high / 1080p 1−2 16−18
ultra / 1080p 0−1 9−10
QHD / 1440p 0−1 4−5
4K / 2160p 4−5
low / 720p 12−14 30−35
medium / 1080p 3−4 20−22
The average gaming FPS of GRID K520 in Assassin's Creed Odyssey is 283% more, than GeForce 840M.

Full Specs

  GeForce 840M GRID K520
Architecture Maxwell Kepler
Code name N15S-GT GK104
Type Laptop Workstation
Release date 12 March 2014 23 July 2013
Pipelines 384 1536
Core clock speed 1029 MHz 745 MHz
Boost Clock 1124 MHz
Transistor count 3,540 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 17.98 95.36
Floating-point performance 863.2 gflops 2x 2,448 gflops
Length 267 mm
Memory bus width 64 Bit 256 Bit
Memory clock speed 2000 MHz 5000 MHz
Memory bandwidth 16.02 GB/s 160.0 GB/s
Shared memory -
DirectX 12 (11_0) 12 (11_0)
Shader Model 5.1 5.1
OpenGL 4.5 4.6
OpenCL 1.2 1.2
Vulkan 1.1.126 1.1.126
CUDA + 3.0
Bus support PCI Express 2.0, PCI Express 3.0
Bitcoin / BTC (SHA256) 92 Mh/s 76 Mh/s
Laptop size medium sized
Optimus +
GPU Boost 2.0
GameWorks +
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