GeForce GT 755M Mac Edition and Radeon X1900 GT - video card comparison
GeForce GT 755M Mac Edition
Radeon X1900 GT
Architecture
Kepler (2012−2018)
R500 (2005−2007)
GPU code name
GK107
R580
Market segment
Desktop
Desktop
Release date
November 2013
May 2006
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
-
1x 6-pin
Core clock speed
1085 MHz
575 MHz
Floating-point performance
833.3 gflops
-
Manufacturing process technology
28 nm
90 nm
Number of transistors
1,270 million
384 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
50 Watt
75 Watt
Texture fill rate
34.72
6.900
Memory type
GDDR5
GDDR3
Maximum RAM amount
1 GB
256 MB
Memory bus width
128 Bit
256 Bit
Memory clock speed
5000 MHz
1200 MHz
Memory bandwidth
80 GB/s
38.4 GB/s
Display Connectors
No outputs
2x DVI, 1x S-Video
DirectX
12 (11_0)
9.0c (9_3)
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
2.0
Shader Model
5.1
3.0
Vulkan
1.1.126
N/A