GeForce GTX 780M Mac Edition and Radeon R9 255 OEM - video card comparison
GeForce GTX 780M Mac Edition
Radeon R9 255 OEM
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
GK104
Cape Verde
Market segment
Desktop
Desktop
Release date
November 2013
December 2013
Interface
MXM-B (3.0)
PCIe 3.0 x16
Supplementary power connectors
-
1x 6-pin
Boost clock speed
797 MHz
930 MHz
Core clock speed
771 MHz
900 MHz
Floating-point performance
2,448 gflops
952.3 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
1,500 million
Pipelines / CUDA cores
1536
512
Power consumption (TDP)
122 Watt
65 Watt
Texture fill rate
102.0
29.76
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
5000 MHz
4600 MHz
Memory bandwidth
160.0 GB/s
73.6 GB/s
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 (11_1)
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.2.131