GeForce GTX 675M SLI vs Radeon R9 M390

Find out if it is worth upgrading your current GPU setup by comparing GeForce GTX 675M SLI and Radeon R9 M390. 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 GTX 675M SLI and Radeon R9 M390. 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 GTX 675M SLI and Radeon R9 M390 are Laptop Graphics Cards

Note: GeForce GTX 675M SLI and Radeon R9 M390 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 GTX 675M SLI or Radeon R9 M390 here:

Main Specs

  GeForce GTX 675M SLI Radeon R9 M390
Power consumption (TDP) 2x 100 Watt
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB
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  • Both cards are used in Laptops.
  • GeForce GTX 675M SLI is build with Fermi architecture, and Radeon R9 M390 - with GCN.
  • GeForce GTX 675M SLI is manufactured by 40 nm process technology, and Radeon R9 M390 - by 28 nm process technology.

Game benchmarks

high / 1080p 18−20 18−20
ultra / 1080p 10−12 10−11
QHD / 1440p 5−6 5−6
4K / 2160p 4−5 4−5
low / 720p 35−40 35−40
medium / 1080p 24−27 21−24
The average gaming FPS of GeForce GTX 675M SLI in Assassin's Creed Odyssey is 6% more, than Radeon R9 M390.

Full Specs

  GeForce GTX 675M SLI Radeon R9 M390
Architecture Fermi GCN
Code name N12E-GTX2 Pitcairn
Type Laptop Laptop
Release date 6 January 2011 9 June 2015
Pipelines 768 1024
Core clock speed 620 MHz
Transistor count 5000 Million
Manufacturing process technology 40 nm 28 nm
Memory bus width 256 Bit 256 Bit
Memory clock speed 3000 MHz
Shared memory - -
DirectX DirectX 11, Shader 5.0
OpenGL 4.4
OpenCL Not Listed
CUDA +
FreeSync +
Bus support PCIe 3.0
SLI options +
Bitcoin / BTC (SHA256) 242 Mh/s
Laptop size large large
Optimus +
Eyefinity +
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
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