Radeon R9 390X and Radeon R9 290X2 - video card comparison
Radeon R9 390X
Radeon R9 290X2
Architecture
GCN (2011−2017)
GCN 2.0 (2013−2017)
GPU code name
Grenada XT
Hawaii
Market segment
Desktop
Desktop
Release date
June 2015
June 2014
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
4x 8-pin
Bridgeless CrossFire
1
-
Boost clock speed
1050 MHz
-
Core clock speed
-
1000 MHz
Floating-point performance
5,914 gflops
2x 5,632 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
6,200 million
Pipelines / CUDA cores
2816
2816
Power consumption (TDP)
275 Watt
580 Watt
Texture fill rate
184.8
176.0
Memory type
GDDR5
GDDR5
Maximum RAM amount
0 MB
4 GB
Memory bus width
512 Bit
512 Bit
Memory clock speed
1050 MHz
5400 MHz
Memory bandwidth
384 GB/s
345.6 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
DirectX® 12
12 (12_0)
Mantle
+
-
OpenCL
2.0
2.0
OpenGL
4.6
4.6
Shader Model
6.3
6.3
Vulkan
+
1.2.131
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-