Radeon R9 390X and Radeon R9 M290X Crossfire - video card comparison
Radeon R9 390X
Radeon R9 M290X Crossfire
Architecture
GCN (2011−2017)
GCN (2011−2017)
GPU code name
Grenada XT
Neptune CF
Market segment
Desktop
Laptop
Release date
June 2015
March 2014
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
-
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
-
Bridgeless CrossFire
1
-
Boost clock speed
1050 MHz
900 MHz
Core clock speed
-
850 MHz
Floating-point performance
5,914 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
2x 2800 Million
Pipelines / CUDA cores
2816
2560
Power consumption (TDP)
275 Watt
200 Watt
Texture fill rate
184.8
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
0 MB
2x 4 GB
Memory bus width
512 Bit
2x 256 Bit
Memory clock speed
1050 MHz
4800 MHz
Memory bandwidth
384 GB/s
-
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
-
Eyefinity
+
-
Number of Eyefinity displays
6
-
HDMI
+
-
DisplayPort support
+
-
DirectX
DirectX® 12
12 (FL 11_1)
Mantle
+
-
OpenCL
2.0
-
OpenGL
4.6
-
Shader Model
6.3
-
Vulkan
+
-
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-