Radeon HD 3850 X2 and GeForce GT 755M Mac Edition - video card comparison
Radeon HD 3850 X2
GeForce GT 755M Mac Edition
Architecture
TeraScale (2005−2013)
Kepler (2012−2018)
GPU code name
RV670
GK107
Market segment
Desktop
Desktop
Release date
April 2008
November 2013
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Core clock speed
669 MHz
1085 MHz
Floating-point performance
2x 428.2 gflops
833.3 gflops
Manufacturing process technology
55 nm
28 nm
Number of transistors
666 million
1,270 million
Pipelines / CUDA cores
320
384
Power consumption (TDP)
140 Watt
50 Watt
Texture fill rate
10.70
34.72
Memory type
GDDR3
GDDR5
Maximum RAM amount
512 MB
1 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
1656 MHz
5000 MHz
Memory bandwidth
52.99 GB/s
80 GB/s
Display Connectors
2x DVI, 1x S-Video
No outputs
DirectX
10.1 (10_1)
12 (11_0)
CUDA
-
3.0
OpenCL
N/A
1.2
OpenGL
3.3
4.6
Shader Model
4.1
5.1
Vulkan
N/A
1.1.126