GeForce 840A vs GeForce GTX 680M SLI

When comparing GeForce 840A and GeForce GTX 680M SLI, 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 840A and GeForce GTX 680M SLI is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

GeForce GTX 680M SLI is a Laptop Graphics Card

Note: GeForce GTX 680M SLI 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 680M SLI here:

Main Specs

  GeForce 840A GeForce GTX 680M SLI
Power consumption (TDP) 33 Watt
Interface PCIe 3.0 x8
Memory type DDR3 GDDR5
Maximum RAM amount 2 GB 2x 4 GB
Display Connectors No outputs
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  • GeForce 840A and GeForce GTX 680M SLI have maximum RAM of 2 GB.
  • GeForce 840A is used in Desktops, and GeForce GTX 680M SLI - in Laptops.
  • GeForce 840A is build with Maxwell architecture, and GeForce GTX 680M SLI - with Kepler.
  • Core clock speed of GeForce 840A is 309 MHz higher, than GeForce GTX 680M SLI.
  • GeForce 840A and GeForce GTX 680M SLI are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce GTX 680M SLI is 1598 MHz higher, than GeForce 840A.

Game benchmarks

high / 1080p 3−4 35−40
ultra / 1080p 2−3 21−24
QHD / 1440p 0−1 16−18
4K / 2160p 10−11
low / 720p 14−16 60−65
medium / 1080p 5−6 40−45
The average gaming FPS of GeForce GTX 680M SLI in Assassin's Creed Odyssey is 583% more, than GeForce 840A.

Full Specs

  GeForce 840A GeForce GTX 680M SLI
Architecture Maxwell Kepler
Code name GM108 N13E-GTX
Type Desktop Laptop
Release date 17 March 2014 4 June 2012
Pipelines 384 2688
Core clock speed 1029 MHz 720 MHz
Boost Clock 1124 MHz
Manufacturing process technology 28 nm 28 nm
Texture fill rate 17.98
Floating-point performance 863.2 gflops
Memory bus width 64 Bit 2x 256 Bit
Memory clock speed 2002 MHz 3600 MHz
Memory bandwidth 16.02 GB/s
Shared memory -
DirectX 12 (11_0) DirectX 11, Shader 5.0
Shader Model 5.1
OpenGL 4.6
OpenCL 1.2
Vulkan 1.1.126
CUDA 5.0 +
SLI options +
Laptop size large
Optimus +
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