Radeon HD 4850 and Radeon HD 6770M Mac Edition - video card comparison
Radeon HD 4850
Radeon HD 6770M Mac Edition
Architecture
Terascale 1 (2008−2010)
TeraScale 2 (2009−2015)
GPU code name
RV770
Whistler
Market segment
Desktop
Desktop
Release date
June 2008
January 2011
Interface
PCIe 2.0 x16
MXM-A (3.0)
Supplementary power connectors
1x 6-pin
-
Core clock speed
625 MHz
725 MHz
Floating-point performance
1,000.0 gflops
696.0 gflops
Manufacturing process technology
55 nm
40 nm
Number of transistors
956 million
716 million
Pipelines / CUDA cores
800
480
Power consumption (TDP)
110 Watt
35 Watt
Texture fill rate
25.00
17.40
Memory type
GDDR3
GDDR5
Maximum RAM amount
512 MB
512 MB
Memory bus width
256 Bit
128 Bit
Memory clock speed
993 MHz
3600 MHz
Memory bandwidth
63.55 GB/s
57.6 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