GeForce GTX 660M vs Radeon R9 M380

Find out if it is worth upgrading your current GPU setup by comparing GeForce GTX 660M and Radeon R9 M380. 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 660M and Radeon R9 M380. 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 660M and Radeon R9 M380 are Laptop Graphics Cards

Note: GeForce GTX 660M and Radeon R9 M380 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 660M or Radeon R9 M380 here:

Main Specs

  GeForce GTX 660M Radeon R9 M380
Power consumption (TDP) 50 Watt
Interface MXM-B (3.0) PCIe 3.0 x16
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors No outputs No outputs
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  • GeForce GTX 660M is connected by MXM-B (3.0), and Radeon R9 M380 uses PCIe 3.0 x16 interface.
  • Radeon R9 M380 has 2 GB more memory, than GeForce GTX 660M.
  • Both cards are used in Laptops.
  • GeForce GTX 660M is build with Kepler architecture, and Radeon R9 M380 - with GCN.
  • Core clock speed of Radeon R9 M380 is 165 MHz higher, than GeForce GTX 660M.
  • GeForce GTX 660M and Radeon R9 M380 are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce GTX 660M is 500 MHz higher, than Radeon R9 M380.

Game benchmarks

high / 1080p 6−7 16−18
ultra / 1080p 4−5 9−10
QHD / 1440p 0−1 4−5
4K / 2160p 4−5
low / 720p 16−18 30−35
medium / 1080p 8−9 20−22
The average gaming FPS of Radeon R9 M380 in Assassin's Creed Odyssey is 122% more, than GeForce GTX 660M.

Full Specs

  GeForce GTX 660M Radeon R9 M380
Architecture Kepler GCN
Code name N13E-GE Strato Pro GDDR5
Type Laptop Laptop
Release date 22 March 2012 16 June 2015
Pipelines 384 768
Core clock speed 835 MHz 1000 MHz
Boost Clock 950 MHz 1000 MHz
Transistor count 1,270 million 2,080 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 30.4 billion/sec 48.00
Floating-point performance 729.6 gflops 1,536 gflops
Memory bus width 128bit 128 Bit
Memory clock speed 2000 MHz 1500 MHz
Memory bandwidth 64.0 GB/s 96 GB/s
Shared memory - -
DirectX 12 API
Shader Model 5.1 6.3
OpenGL 4.5 4.4
OpenCL 1.1 Not Listed
Vulkan 1.1.126
CUDA +
FreeSync +
CUDA cores 384
Bus support PCI Express 2.0, PCI Express 3.0 PCIe 3.0
SLI options +
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
Bitcoin / BTC (SHA256) 36 Mh/s 194 Mh/s
Laptop size large medium sized
Optimus +
Eyefinity +
HD3D +
PowerTune +
DualGraphics +
TrueAudio +
ZeroCore +
Switchable graphics +
Mantle +
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