Radeon R9 390 and Radeon HD 8790M - video card comparison
Passmark - benchmark score Radeon R9 390 vs Radeon HD 8790M
Radeon R9 390
9182
Radeon HD 8790M
1344
Radeon R9 390
Radeon HD 8790M
Architecture
GCN 2.0 (2013−2017)
GCN (2011−2017)
GPU code name
Grenada
Mars XTX
Market segment
Desktop
Laptop
Release date
June 2015
November 2012
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
MXM-A (3.0)
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
None
Bridgeless CrossFire
1
-
Boost clock speed
1000 MHz
900 MHz
Core clock speed
-
850 MHz
Floating-point performance
5,120 gflops
691.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
950 million
Pipelines / CUDA cores
2560
384
Power consumption (TDP)
275 Watt
unknown
Texture fill rate
160.0
21.60
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
64 GB/s
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
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
-
-