Radeon R9 390X and GeForce GTX 660 - video card comparison
Passmark - benchmark score Radeon R9 390X vs GeForce GTX 660
Radeon R9 390X
9722
GeForce GTX 660
4119
Radeon R9 390X
GeForce GTX 660
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Grenada XT
GK106
Market segment
Desktop
Desktop
Release date
June 2015
September 2012
Bus support
PCIe 3.0
PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
One 6-pin
SLI options
-
+
Bridgeless CrossFire
1
-
Boost clock speed
1050 MHz
1033 MHz
Core clock speed
-
980 MHz
CUDA cores
-
960
Floating-point performance
5,914 gflops
1,981 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
2,540 million
Pipelines / CUDA cores
2816
960
Power consumption (TDP)
275 Watt
140 Watt
Texture fill rate
184.8
78.4 billion/sec
Memory type
GDDR5
GDDR5
Maximum RAM amount
0 MB
2 GB
Memory bus width
512 Bit
192-bit GDDR5
Memory clock speed
1050 MHz
6.0 GB/s
Memory bandwidth
384 GB/s
144.2 GB/s
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
Multi monitor support
-
4 displays
Eyefinity
+
-
Number of Eyefinity displays
6
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
2048x1536
DisplayPort support
+
-
Audio input for HDMI
-
Internal
DirectX
DirectX® 12
12 (11_0)
CUDA
-
+
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.6
4.3
Shader Model
6.3
5.1
Vulkan
+
1.1.126
3D Blu-Ray
-
+
3D Gaming
-
+
3D Vision
-
+
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-