GeForce GTX 870M vs Radeon R9 390X

In this comparison between GeForce GTX 870M and Radeon R9 390X 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 GTX 870M will be the best choice, for others Radeon R9 390X will be their preference. Study the comparison tables below and make your choice.

GeForce GTX 870M is a Laptop Graphics Card

Note: GeForce GTX 870M 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 870M here:

Main Specs

  GeForce GTX 870M Radeon R9 390X
Power consumption (TDP) 100 Watt 275 Watt
Interface MXM-B (3.0) PCIe 3.0 x16
Supplementary power connectors None 1 x 6-pin, 1 x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 6 GB
Display Connectors No outputs 2x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon R9 390X has 175% more power consumption, than GeForce GTX 870M.
  • GeForce GTX 870M is connected by MXM-B (3.0), and Radeon R9 390X uses PCIe 3.0 x16 interface.
  • GeForce GTX 870M is used in Laptops, and Radeon R9 390X - in Desktops.
  • GeForce GTX 870M is build with Kepler architecture, and Radeon R9 390X - with GCN.
  • GeForce GTX 870M and Radeon R9 390X are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 16−18 50−55
ultra / 1080p 10−11 30−35
QHD / 1440p 4−5 24−27
4K / 2160p 14−16
low / 720p 35−40 75−80
medium / 1080p 21−24 55−60
The average gaming FPS of Radeon R9 390X in Assassin's Creed Odyssey is 172% more, than GeForce GTX 870M.

Full Specs

  GeForce GTX 870M Radeon R9 390X
Architecture Kepler GCN
Code name N15P-GT Grenada XT
Type Laptop Desktop
Release date 12 March 2014 16 June 2015
Pipelines 1344 2816
Core clock speed 941 MHz
Boost Clock 967 MHz 1050 MHz
Transistor count 3,540 million 6,200 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 108.3 184.8
Floating-point performance 2,599 gflops 5,914 gflops
Length 275 mm
Memory bus width 192 Bit 512 Bit
Memory clock speed 1050 MHz
Memory bandwidth 120.0 GB/s 384 GB/s
Shared memory - -
DirectX 12 (11_0)
Shader Model 5.1 6.3
OpenGL 4.5 4.6
OpenCL 1.1 2.0
Vulkan 1.1.126 +
CUDA +
FreeSync +
CUDA cores 1344
Bus support PCI Express 2.0, PCI Express 3.0 PCIe 3.0
SLI options +
HDMI + +
Bitcoin / BTC (SHA256) 82 Mh/s 684 Mh/s
Laptop size large
Standard memory configuration GDDR5
eDP 1.2 signal support Up to 3840x2160
LVDS signal support Up to 1920x1200
DisplayPort Multimode (DP++) support Up to 3840x2160
HDCP content protection +
7.1 channel HD audio on HDMI +
TrueHD and DTS-HD audio bitstreaming +
H.264, VC1, MPEG2 1080p video decoder +
Optimus +
Eyefinity +
PowerTune +
TrueAudio +
Mantle +
Design reference
Bridgeless CrossFire +
Number of Eyefinity displays 6
DisplayPort support +
CrossFire +
VCE +
DDMA audio +
Ethereum / ETH (DaggerHashimoto) 27.5 Mh/s
High bandwidth memory (HBM) -
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