Radeon RX 480 and GeForce GTX 660 Rev. 2 - video card comparison
Radeon RX 480
GeForce GTX 660 Rev. 2
Architecture
Polaris (2016−2019)
Kepler (2012−2018)
GPU code name
Polaris 10 Ellesmere
GK104
Market segment
Desktop
Desktop
Release date
June 2016
September 2014
Bus support
n/a
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin
1x 6-pin
Bridgeless CrossFire
1
-
Boost clock speed
1266 MHz
1032 MHz
Compute units
36
-
Core clock speed
1120 MHz
980 MHz
Floating-point performance
5,834 gflops
1,981 gflops
Manufacturing process technology
14 nm
28 nm
Number of transistors
5,700 million
3,540 million
Pipelines / CUDA cores
2304
960
Power consumption (TDP)
150 Watt
140 Watt
Texture fill rate
182.3
82.56
Memory type
GDDR5
GDDR5
Maximum RAM amount
8 GB
2 GB
Memory bus width
256 Bit
192 Bit
Memory clock speed
8000 MHz
6008 MHz
Memory bandwidth
224 GB/s
144.2 GB/s
Shared memory
-
-
Display Connectors
1x HDMI, 3x DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
Eyefinity
1
-
HDMI
2.0
+
DisplayPort support
1.4HDR
-
DirectX
DirectX® 12
12 (11_0)
CUDA
-
3.0
Mantle
n/a
-
OpenCL
2.0
1.2
OpenGL
4.5
4.6
Shader Model
6.4
5.1
Vulkan
+
1.1.126
AppAcceleration
n/a
-
CrossFire
1
-
Enduro
n/a
-
FreeSync
+
-
FRTC
1
-
HD3D
n/a
-
LiquidVR
1
-
PowerTune
+
-
TressFX
1
-
TrueAudio
n/a
-
UVD
+
-
VCE
+
-
ZeroCore
+
-