Radeon R9 390 and GeForce GTX 780M Mac Edition - video card comparison
Radeon R9 390
GeForce GTX 780M Mac Edition
Architecture
GCN 2.0 (2013−2017)
Kepler (2012−2018)
GPU code name
Grenada
GK104
Market segment
Desktop
Desktop
Release date
June 2015
November 2013
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
-
Bridgeless CrossFire
1
-
Boost clock speed
1000 MHz
797 MHz
Core clock speed
-
771 MHz
Floating-point performance
5,120 gflops
2,448 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
3,540 million
Pipelines / CUDA cores
2560
1536
Power consumption (TDP)
275 Watt
122 Watt
Texture fill rate
160.0
102.0
Memory type
GDDR5
GDDR5
Maximum RAM amount
0 MB
4 GB
Memory bus width
512 Bit
256 Bit
Memory clock speed
1000 MHz
5000 MHz
Memory bandwidth
384 GB/s
160.0 GB/s
High bandwidth memory (HBM)
-
-
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_0)
CUDA
-
3.0
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.3
5.1
Vulkan
+
1.1.126
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-