GeForce 840M vs Radeon R9 270X

If you are going to buy a new graphics card and are choosing between GeForce 840M and Radeon R9 270X, 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 Radeon R9 270X, check out specs charts below.

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 Radeon R9 270X
Power consumption (TDP) 33 Watt 180 Watt
Interface PCIe 3.0 x8 PCIe 3.0 x16
Supplementary power connectors 2 x 6-pin
Memory type DDR3 GDDR5
Maximum RAM amount 4 GB 2 GB
Display Connectors No outputs 2x DVI, 1x HDMI, 1x DisplayPort
  Check Price Check Price
  • Radeon R9 270X has 445% more power consumption, than GeForce 840M.
  • GeForce 840M is connected by PCIe 3.0 x8, and Radeon R9 270X uses PCIe 3.0 x16 interface.
  • GeForce 840M has 2 GB more memory, than Radeon R9 270X.
  • GeForce 840M is used in Laptops, and Radeon R9 270X - in Desktops.
  • GeForce 840M is build with Maxwell architecture, and Radeon R9 270X - with GCN.
  • GeForce 840M and Radeon R9 270X are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 1−2 24−27
ultra / 1080p 0−1 14−16
QHD / 1440p 0−1 10−11
4K / 2160p 6−7
low / 720p 12−14 45−50
medium / 1080p 3−4 30−35
The average gaming FPS of Radeon R9 270X in Assassin's Creed Odyssey is 483% more, than GeForce 840M.

Full Specs

  GeForce 840M Radeon R9 270X
Architecture Maxwell GCN
Code name N15S-GT Curacao XT
Type Laptop Desktop
Release date 12 March 2014 8 October 2013
Pipelines 384 1280
Core clock speed 1029 MHz
Boost Clock 1124 MHz 1050 MHz
Transistor count 2,800 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 17.98 84.00
Floating-point performance 863.2 gflops 2,688 gflops
Memory bus width 64 Bit 256 Bit
Memory clock speed 2000 MHz
Memory bandwidth 16.02 GB/s 179.2 GB/s
Shared memory - -
DirectX 12 (11_0)
Shader Model 5.1 5.1
OpenGL 4.5 4.6
OpenCL 1.2 1.2
Vulkan 1.1.126 +
CUDA +
FreeSync +
Bus support PCI Express 2.0, PCI Express 3.0 PCIe 3.0
HDMI +
Bitcoin / BTC (SHA256) 92 Mh/s 318 Mh/s
Laptop size medium sized
Optimus +
Eyefinity +
HD3D +
TrueAudio +
Design reference
DisplayPort support +
CrossFire +
DDMA audio +
Ethereum / ETH (DaggerHashimoto) 30 Mh/s
Zcash / ZEC (Equihash) 163 Sol/s
GPU Boost 2.0
GameWorks +
AppAcceleration +
LiquidVR +
TressFX +
UVD +
  Check Price Check Price