GeForce GTX 660 vs Radeon R9 380

If you are going to buy a new graphics card and are choosing between GeForce GTX 660 and Radeon R9 380, 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 GTX 660 stacks up against Radeon R9 380, check out specs charts below.

Main Specs

  GeForce GTX 660 Radeon R9 380
Power consumption (TDP) 140 Watt 190 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Supplementary power connectors One 6-pin 2 x 6-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort 2x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon R9 380 has 35% more power consumption, than GeForce GTX 660.
  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • Radeon R9 380 has 2 GB more memory, than GeForce GTX 660.
  • Both cards are used in Desktops.
  • GeForce GTX 660 is build with Kepler architecture, and Radeon R9 380 - with GCN.
  • GeForce GTX 660 and Radeon R9 380 are manufactured by 28 nm process technology.
  • Radeon R9 380 is 212 mm longer, than GeForce GTX 660.
  • Memory clock speed of Radeon R9 380 is 964 MHz higher, than GeForce GTX 660.

Game benchmarks

high / 1080p 20−22 35−40
ultra / 1080p 12−14 21−24
QHD / 1440p 6−7 16−18
4K / 2160p 5−6 10−11
low / 720p 40−45 60−65
medium / 1080p 24−27 40−45
The average gaming FPS of Radeon R9 380 in Assassin's Creed Odyssey is 68% more, than GeForce GTX 660.

Full Specs

  GeForce GTX 660 Radeon R9 380
Architecture Kepler GCN
Code name GK106 Tonga Pro
Type Desktop Desktop
Release date 6 September 2012 26 June 2015
Pipelines 960 1792
Core clock speed 980 MHz
Boost Clock 1033 MHz 970 MHz
Transistor count 2,540 million 5,000 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 78.4 billion/sec 108.6
Floating-point performance 1,981 gflops 3,476 gflops
Length 9.5" (24.1 cm) 221 mm
Memory bus width 192-bit GDDR5 256 Bit
Memory clock speed 6.0 GB/s 970 MHz
Memory bandwidth 144.2 GB/s 182.4 GB/s
Shared memory -
DirectX 12 (11_0)
Shader Model 5.1 6.3
OpenGL 4.3 4.5
OpenCL 1.2 2.0
Vulkan 1.1.126 +
CUDA +
Monero / XMR (CryptoNight) 0.48 kh/s
FreeSync +
CUDA cores 960
Bus support PCI Express 3.0 PCIe 3.0
Height 4.376" (11.1 cm)
SLI options +
Multi monitor support 4 displays
HDMI + +
HDCP +
Maximum VGA resolution 2048x1536
Audio input for HDMI Internal
3D Blu-Ray +
3D Gaming +
3D Vision +
Bitcoin / BTC (SHA256) 66 Mh/s 404 Mh/s
Eyefinity +
HD3D +
PowerTune +
TrueAudio +
ZeroCore +
Mantle +
Design reference
Bridgeless CrossFire +
Number of Eyefinity displays 6
DisplayPort support +
CrossFire +
VCE +
DDMA audio +
Decred / DCR (Decred) 0.66 Gh/s
Ethereum / ETH (DaggerHashimoto) 18 Mh/s
Zcash / ZEC (Equihash) 168.45 Sol/s
Compute units 28
Form factor full height / full length / dual slot
High bandwidth memory (HBM) -
LiquidVR +
FRTC +
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