Radeon R9 380X and GeForce GTX 660 OEM - video card comparison
Radeon R9 380X
GeForce GTX 660 OEM
Architecture
GCN 3.0 (2014−2017)
Kepler (2012−2018)
GPU code name
Antigua
GK104
Market segment
Desktop
Desktop
Release date
November 2015
August 2012
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2 x 6-pin
1x 6-pin
Bridgeless CrossFire
1
-
Boost clock speed
970 MHz
888 MHz
Compute units
32
-
Core clock speed
-
823 MHz
Floating-point performance
3,973 gflops
2,046 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,000 million
3,540 million
Pipelines / CUDA cores
2048
1152
Power consumption (TDP)
190 Watt
130 Watt
Texture fill rate
124.2
85.25
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
970 MHz
5600 MHz
Memory bandwidth
182.4 GB/s
179.2 GB/s
High bandwidth memory (HBM)
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
Eyefinity
1
-
Number of Eyefinity displays
6
-
HDMI
+
+
DisplayPort support
+
-
DirectX
DirectX® 12
12 (11_0)
CUDA
-
3.0
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.5
4.6
Shader Model
6.3
5.1
Vulkan
+
1.1.126
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
FRTC
1
-
HD3D
+
-
LiquidVR
1
-
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
+
-