Radeon R9 390 X2 and Radeon HD 8490 OEM - video card comparison
Radeon R9 390 X2
Radeon HD 8490 OEM
Architecture
GCN 2.0 (2013−2017)
TeraScale 2 (2009−2015)
GPU code name
Grenada
Caicos
Market segment
Desktop
Desktop
Release date
September 2015
July 2013
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
4x 8-pin
None
Core clock speed
1000 MHz
875 MHz
Floating-point performance
2x 5,120 gflops
280.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
6,200 million
370 million
Pipelines / CUDA cores
2560
160
Power consumption (TDP)
580 Watt
35 Watt
Texture fill rate
160.0
7.000
Memory type
GDDR5
DDR3
Maximum RAM amount
8 GB
1 GB
Memory bus width
512 Bit
64 Bit
Memory clock speed
5400 MHz
1800 MHz
Memory bandwidth
345.6 GB/s
14.4 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x DisplayPort
HDMI
+
-
DirectX
12 (12_0)
11.2 (11_0)
OpenCL
2.0
1.2
OpenGL
4.6
4.4
Shader Model
6.3
5.0
Vulkan
1.2.131
N/A