Radeon R9 390 and Radeon HD 7770 - video card comparison
Passmark - benchmark score Radeon R9 390 vs Radeon HD 7770
Radeon R9 390
9182
Radeon HD 7770
2235
Radeon R9 390
Radeon HD 7770
Architecture
GCN 2.0 (2013−2017)
GCN (2011−2017)
GPU code name
Grenada
Cape Verde
Market segment
Desktop
Desktop
Release date
June 2015
February 2012
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
1x 6-pin
Bridgeless CrossFire
1
-
Boost clock speed
1000 MHz
-
Core clock speed
-
1000 MHz
Floating-point performance
5,120 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
1,500 million
Pipelines / CUDA cores
2560
640
Power consumption (TDP)
275 Watt
80 Watt
Texture fill rate
160.0
40.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
0 MB
2 GB
Memory bus width
512 Bit
128 Bit
Memory clock speed
1000 MHz
4500 MHz
Memory bandwidth
384 GB/s
72 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
12 (11_1)
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.3
5.1
Vulkan
+
1.2.131
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-