GeForce GTX 775M and Radeon R9 M390 Mac Edition - video card comparison
GeForce GTX 775M
Radeon R9 M390 Mac Edition
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
N13E-GTX-A2
Pitcairn
Market segment
Laptop
Desktop
Release date
September 2013
May 2015
Interface
-
PCIe 3.0 x16
Supplementary power connectors
-
None
SLI options
+
-
Core clock speed
719 MHz
958 MHz
Manufacturing process technology
28 nm
28 nm
Number of transistors
3540 Million
2,800 million
Pipelines / CUDA cores
1344
1024
Power consumption (TDP)
100 Watt
80 Watt
Texture fill rate
-
61.31
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
3600 MHz
5.5 GB/s
Memory bandwidth
-
174.7 GB/s
Shared memory
-
-
Display Connectors
-
No outputs
DirectX
11
12 (11_1)
CUDA
+
-
OpenCL
-
1.2
OpenGL
-
4.6
Shader Model
-
5.1
Vulkan
-
1.2
Optimus
+
-