Radeon HD 4870 and Radeon HD 6750M Mac Edition - video card comparison
Radeon HD 4870
Radeon HD 6750M Mac Edition
Architecture
TeraScale (2005−2013)
TeraScale 2 (2009−2015)
GPU code name
RV770
Whistler
Market segment
Desktop
Desktop
Release date
June 2008
April 2011
Interface
PCIe 2.0 x16
MXM-A (3.0)
Supplementary power connectors
2x 6-pin
-
Core clock speed
750 MHz
598 MHz
Floating-point performance
1,200.0 gflops
574.1 gflops
Manufacturing process technology
55 nm
40 nm
Number of transistors
956 million
716 million
Pipelines / CUDA cores
800
480
Power consumption (TDP)
150 Watt
35 Watt
Texture fill rate
30.00
14.35
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
512 MB
Memory bus width
256 Bit
128 Bit
Memory clock speed
3600 MHz
3176 MHz
Memory bandwidth
115.2 GB/s
50.82 GB/s
Display Connectors
2x DVI, 1x S-Video
No outputs
DirectX
10.1 (10_1)
11.2 (11_0)
OpenCL
1.1
1.2
OpenGL
3.3
4.4
Shader Model
4.1
5.0
Vulkan
N/A
N/A