GeForce 840M vs UHD Graphics 615

If you are going to buy a new graphics card and are choosing between GeForce 840M and UHD Graphics 615, 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 840M stacks up against UHD Graphics 615, check out specs charts below.

GeForce 840M and UHD Graphics 615 are Laptop Graphics Cards

Note: GeForce 840M and UHD Graphics 615 are only used in laptop graphics. They have 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 or UHD Graphics 615 here:

Main Specs

  GeForce 840M UHD Graphics 615
Power consumption (TDP) 33 Watt 15 Watt
Interface PCIe 3.0 x8 PCIe 3.0 x1
Memory type DDR3 DDR3L/LPDDR3
Maximum RAM amount 4 GB
Display Connectors No outputs No outputs
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  • GeForce 840M has 120% more power consumption, than UHD Graphics 615.
  • GeForce 840M is connected by PCIe 3.0 x8, and UHD Graphics 615 uses PCIe 3.0 x1 interface.
  • Both cards are used in Laptops.
  • GeForce 840M is build with Maxwell architecture, and UHD Graphics 615 - with Gen. 9 Amber Lake.
  • Core clock speed of GeForce 840M is 729 MHz higher, than UHD Graphics 615.
  • GeForce 840M is manufactured by 28 nm process technology, and UHD Graphics 615 - by 14 nm process technology.

Game benchmarks

high / 1080p 1−2 0−1
ultra / 1080p 0−1 0−1
QHD / 1440p 0−1 0−1
low / 720p 12−14 10−11
medium / 1080p 3−4 1−2
The average gaming FPS of GeForce 840M in Assassin's Creed Odyssey is 33% more, than UHD Graphics 615.

Full Specs

  GeForce 840M UHD Graphics 615
Architecture Maxwell Gen. 9 Amber Lake
Code name N15S-GT Kaby-Lake GT2
Type Laptop Laptop
Release date 12 March 2014 30 August 2018
Pipelines 384 24
Core clock speed 1029 MHz 300 MHz
Boost Clock 1124 MHz 1000 MHz
Manufacturing process technology 28 nm 14 nm
Texture fill rate 17.98 25.20
Floating-point performance 863.2 gflops
Memory bus width 64 Bit 64/128 Bit
Memory clock speed 2000 MHz
Memory bandwidth 16.02 GB/s
Shared memory - +
DirectX 12 (11_0) 12 (12_1)
Shader Model 5.1 6.4
OpenGL 4.5 4.6
OpenCL 1.2 2.1
Vulkan 1.1.126 1.1.103
CUDA +
Bus support PCI Express 2.0, PCI Express 3.0
Bitcoin / BTC (SHA256) 92 Mh/s
Laptop size medium sized
Optimus +
Quick Sync +
GPU Boost 2.0
GameWorks +
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