Radeon R9 390 X2 and Radeon R9 380 - video card comparison
Radeon R9 390 X2
Radeon R9 380
Architecture
GCN 2.0 (2013−2017)
GCN (2011−2017)
GPU code name
Grenada
Tonga Pro
Market segment
Desktop
Desktop
Release date
September 2015
June 2015
Bus support
-
PCIe 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
4x 8-pin
2 x 6-pin
Bridgeless CrossFire
-
1
Boost clock speed
-
970 MHz
Compute units
-
28
Core clock speed
1000 MHz
-
Floating-point performance
2x 5,120 gflops
3,476 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
5,000 million
Pipelines / CUDA cores
2560
1792
Power consumption (TDP)
580 Watt
190 Watt
Texture fill rate
160.0
108.6
Memory type
GDDR5
GDDR5
Maximum RAM amount
8 GB
4 GB
Memory bus width
512 Bit
256 Bit
Memory clock speed
5400 MHz
970 MHz
Memory bandwidth
345.6 GB/s
182.4 GB/s
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
Eyefinity
-
+
Number of Eyefinity displays
-
6
HDMI
+
+
DisplayPort support
-
+
DirectX
12 (12_0)
DirectX® 12
Mantle
-
+
OpenCL
2.0
2.0
OpenGL
4.6
4.5
Shader Model
6.3
6.3
Vulkan
1.2.131
+
AppAcceleration
-
-
CrossFire
-
1
DDMA audio
-
+
Enduro
-
-
FreeSync
-
1
FRTC
-
1
HD3D
-
+
LiquidVR
-
1
PowerTune
-
+
TrueAudio
-
+
VCE
-
+
ZeroCore
-
+