Radeon R9 380 and GeForce GTX 660M Mac Edition - video card comparison
Radeon R9 380
GeForce GTX 660M Mac Edition
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Tonga Pro
GK107
Market segment
Desktop
Desktop
Release date
June 2015
April 2013
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
2 x 6-pin
None
Bridgeless CrossFire
1
-
Boost clock speed
970 MHz
-
Compute units
28
-
Core clock speed
-
950 MHz
Floating-point performance
3,476 gflops
729.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,000 million
1,270 million
Pipelines / CUDA cores
1792
384
Power consumption (TDP)
190 Watt
50 Watt
Texture fill rate
108.6
30.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
512 MB
Memory bus width
256 Bit
128 Bit
Memory clock speed
970 MHz
5000 MHz
Memory bandwidth
182.4 GB/s
80 GB/s
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
Eyefinity
+
-
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
+
-