GeForce GT 755M SLI vs Radeon R9 M390X

In this comparison between GeForce GT 755M SLI and Radeon R9 M390X 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 GT 755M SLI will be the best choice, for others Radeon R9 M390X will be their preference. Study the comparison tables below and make your choice.

GeForce GT 755M SLI and Radeon R9 M390X are Laptop Graphics Cards

Note: GeForce GT 755M SLI and Radeon R9 M390X 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 GT 755M SLI or Radeon R9 M390X here:

Main Specs

  GeForce GT 755M SLI Radeon R9 M390X
Power consumption (TDP) 2x ~50 Watt 100 Watt
Interface PCIe 3.0 x16
Supplementary power connectors None
Memory type GDDR5 GDDR5
Maximum RAM amount 2x 2 GB 4 GB
Display Connectors No outputs
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  • Radeon R9 M390X has 4900% more power consumption, than GeForce GT 755M SLI.
  • Radeon R9 M390X has 2 GB more memory, than GeForce GT 755M SLI.
  • Both cards are used in Laptops.
  • GeForce GT 755M SLI is build with Kepler architecture, and Radeon R9 M390X - with GCN 3.
  • Core clock speed of GeForce GT 755M SLI is 257 MHz higher, than Radeon R9 M390X.
  • GeForce GT 755M SLI and Radeon R9 M390X are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 14−16 21−24
ultra / 1080p 8−9 12−14
QHD / 1440p 2−3 8−9
4K / 2160p 5−6
low / 720p 30−35 40−45
medium / 1080p 18−20 27−30
The average gaming FPS of Radeon R9 M390X in Assassin's Creed Odyssey is 53% more, than GeForce GT 755M SLI.

Full Specs

  GeForce GT 755M SLI Radeon R9 M390X
Architecture Kepler GCN 3
Code name N14P-? Amethyst (XT) / Tonga
Type Laptop Laptop
Release date 1 November 2013 9 June 2015
Pipelines 768 2048
Core clock speed 980 MHz 723 MHz
Transistor count 2x 1300 Million 5,000 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 92.54
Floating-point performance 2,961 gflops
Memory bus width 2x 128 Bit 256 Bit
Memory clock speed 5400 MHz
Memory bandwidth 160.0 GB/s
Shared memory - -
DirectX DirectX 11, Shader 5.0
Shader Model 6.3
OpenGL 4.4
OpenCL Not Listed
Vulkan +
CUDA +
FreeSync +
Bus support PCIe 3.0
Laptop size large large
Eyefinity +
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
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