GeForce GTX 660 and Radeon R9 380 OEM - video card comparison
GeForce GTX 660
Radeon R9 380 OEM
Architecture
Kepler (2012−2018)
GCN 3.0 (2014−2017)
GPU code name
GK106
Antigua
Market segment
Desktop
Desktop
Release date
September 2012
May 2015
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
One 6-pin
2x 6-pin
SLI options
+
-
Boost clock speed
1033 MHz
-
Core clock speed
980 MHz
918 MHz
CUDA cores
960
-
Floating-point performance
1,981 gflops
3,290 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,540 million
5,000 million
Pipelines / CUDA cores
960
1792
Power consumption (TDP)
140 Watt
190 Watt
Texture fill rate
78.4 billion/sec
102.8
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
4 GB
Memory bus width
192-bit GDDR5
256 Bit
Memory clock speed
6.0 GB/s
5500 MHz
Memory bandwidth
144.2 GB/s
176.0 GB/s
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
Multi monitor support
4 displays
-
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 (12_0)
CUDA
+
-
OpenCL
1.2
2.0
OpenGL
4.3
4.6
Shader Model
5.1
6.3
Vulkan
1.1.126
1.2.131
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-