Radeon R9 390 X2 and Radeon RX 480 - video card comparison
Radeon R9 390 X2
Radeon RX 480
Architecture
GCN 2.0 (2013−2017)
Polaris (2016−2019)
GPU code name
Grenada
Polaris 10 Ellesmere
Market segment
Desktop
Desktop
Release date
September 2015
June 2016
Bus support
-
n/a
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
4x 8-pin
1x 6-pin
Bridgeless CrossFire
-
1
Boost clock speed
-
1266 MHz
Compute units
-
36
Core clock speed
1000 MHz
1120 MHz
Floating-point performance
2x 5,120 gflops
5,834 gflops
Manufacturing process technology
28 nm
14 nm
Number of transistors
6,200 million
5,700 million
Pipelines / CUDA cores
2560
2304
Power consumption (TDP)
580 Watt
150 Watt
Texture fill rate
160.0
182.3
Memory type
GDDR5
GDDR5
Maximum RAM amount
8 GB
8 GB
Memory bus width
512 Bit
256 Bit
Memory clock speed
5400 MHz
8000 MHz
Memory bandwidth
345.6 GB/s
224 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x HDMI, 3x DisplayPort
Eyefinity
-
1
HDMI
+
2.0
DisplayPort support
-
1.4HDR
DirectX
12 (12_0)
DirectX® 12
Mantle
-
n/a
OpenCL
2.0
2.0
OpenGL
4.6
4.5
Shader Model
6.3
6.4
Vulkan
1.2.131
+
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
-
+