Radeon HD 7870 and Radeon R9 M390 - video card comparison
Radeon HD 7870
Radeon R9 M390
Architecture
GCN (2011−2017)
GCN (2011−2017)
GPU code name
Pitcairn XT
Pitcairn
Market segment
Desktop
Laptop
Release date
March 2012
June 2015
Bus support
-
PCIe 3.0
Interface
PCIe 3.0 x16
-
Supplementary power connectors
2x 6-pin
-
Core clock speed
1000 MHz
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
2800 Million
5000 Million
Pipelines / CUDA cores
1280
1024
Power consumption (TDP)
175 Watt
-
Texture fill rate
80.00
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
4800 MHz
-
Memory bandwidth
153.6 GB/s
-
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
-
Eyefinity
+
1
HDMI
+
-
DirectX
12 (11_1)
DirectX® 12
Mantle
-
+
OpenCL
1.2
Not Listed
OpenGL
4.6
4.4
Shader Model
5.1
-
Vulkan
1.2.131
-
AppAcceleration
-
-
DualGraphics
-
1
Enduro
-
-
FreeSync
-
1
HD3D
-
+
PowerTune
-
+
Switchable graphics
-
1
TrueAudio
-
-
ZeroCore
-
+