Radeon R9 280 and Radeon R9 M390 - video card comparison
Radeon R9 280
Radeon R9 M390
Architecture
GCN 1.0 (2012−2020)
GCN (2011−2017)
GPU code name
Tahiti
Pitcairn
Market segment
Desktop
Laptop
Release date
March 2014
June 2015
Bus support
PCIe 3.0
PCIe 3.0
Interface
PCIe 3.0 x16
-
Supplementary power connectors
1 x 6-pin + 1 x 8-pin
-
Boost clock speed
933 MHz
-
Floating-point performance
3,344 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
5000 Million
Pipelines / CUDA cores
1792
1024
Power consumption (TDP)
200 Watt
-
Texture fill rate
104.5
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
2 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
1250 MHz
-
Memory bandwidth
240 GB/s
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
-
Eyefinity
1
1
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 12
DirectX® 12
Mantle
-
+
OpenCL
1.2
Not Listed
OpenGL
4.6
4.4
Shader Model
5.1
-
Vulkan
+
-
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
DualGraphics
-
1
Enduro
-
-
FreeSync
1
1
HD3D
+
+
LiquidVR
1
-
PowerTune
-
+
Switchable graphics
-
1
TressFX
1
-
TrueAudio
+
-
UVD
+
-
ZeroCore
-
+