Radeon R9 390 and Radeon HD 7970 - video card comparison
Passmark - benchmark score Radeon R9 390 vs Radeon HD 7970
Radeon R9 390
9182
Radeon HD 7970
5405
Radeon R9 390
Radeon HD 7970
Architecture
GCN 2.0 (2013−2017)
GCN (2011−2017)
GPU code name
Grenada
Tahiti XT
Market segment
Desktop
Desktop
Release date
June 2015
December 2011
Bus support
PCIe 3.0
PCIe 2.1 x16
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
1x 6-pin + 1x 8-pin
Bridgeless CrossFire
1
-
Boost clock speed
1000 MHz
925 MHz
Floating-point performance
5,120 gflops
3,789 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
4,313 million
Pipelines / CUDA cores
2560
2048
Power consumption (TDP)
275 Watt
300 Watt
Texture fill rate
160.0
118.4
Memory type
GDDR5
GDDR5
Maximum RAM amount
0 MB
6 GB
Memory bus width
512 Bit
384 Bit
Memory clock speed
1000 MHz
1375 MHz
Memory bandwidth
384 GB/s
264 GB/s
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
1
+
Number of Eyefinity displays
6
-
HDMI
+
+
DisplayPort support
+
-
DirectX
DirectX® 12
DirectX® 11
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
-
-
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-