Radeon R9 390 X2 and Radeon R9 M290X Crossfire - video card comparison
Radeon R9 390 X2
Radeon R9 M290X Crossfire
Architecture
GCN 2.0 (2013−2017)
GCN (2011−2017)
GPU code name
Grenada
Neptune CF
Market segment
Desktop
Laptop
Release date
September 2015
March 2014
Interface
PCIe 3.0 x16
-
Supplementary power connectors
4x 8-pin
-
Boost clock speed
-
900 MHz
Core clock speed
1000 MHz
850 MHz
Floating-point performance
2x 5,120 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
2x 2800 Million
Pipelines / CUDA cores
2560
2560
Power consumption (TDP)
580 Watt
200 Watt
Texture fill rate
160.0
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
8 GB
2x 4 GB
Memory bus width
512 Bit
2x 256 Bit
Memory clock speed
5400 MHz
4800 MHz
Memory bandwidth
345.6 GB/s
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
-
HDMI
+
-
DirectX
12 (12_0)
12 (FL 11_1)
OpenCL
2.0
-
OpenGL
4.6
-
Shader Model
6.3
-
Vulkan
1.2.131
-