Radeon R9 390X and Radeon R9 280 - video card comparison
Passmark - benchmark score Radeon R9 390X vs Radeon R9 280
Radeon R9 390X
9722
Radeon R9 280
5725
Radeon R9 390X
Radeon R9 280
Architecture
GCN (2011−2017)
GCN 1.0 (2012−2020)
GPU code name
Grenada XT
Tahiti
Market segment
Desktop
Desktop
Release date
June 2015
March 2014
Bus support
PCIe 3.0
PCIe 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
1 x 6-pin + 1 x 8-pin
Bridgeless CrossFire
1
-
Boost clock speed
1050 MHz
933 MHz
Floating-point performance
5,914 gflops
3,344 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
4,313 million
Pipelines / CUDA cores
2816
1792
Power consumption (TDP)
275 Watt
200 Watt
Texture fill rate
184.8
104.5
Memory type
GDDR5
GDDR5
Maximum RAM amount
0 MB
3 GB
Memory bus width
512 Bit
384 Bit
Memory clock speed
1050 MHz
1250 MHz
Memory bandwidth
384 GB/s
240 GB/s
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
+
1
Number of Eyefinity displays
6
-
HDMI
+
+
DisplayPort support
+
-
DirectX
DirectX® 12
DirectX® 12
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.3
5.1
Vulkan
+
+
AppAcceleration
-
-
CrossFire
1
1
DDMA audio
+
+
Enduro
-
-
FreeSync
1
1
HD3D
-
+
LiquidVR
-
1
PowerTune
+
-
TressFX
-
1
TrueAudio
+
+
UVD
-
+
VCE
+
-
ZeroCore
-
-