Radeon HD 6870 1600SP Edition and Radeon HD 6770M Mac Edition - video card comparison
Radeon HD 6870 1600SP Edition
Radeon HD 6770M Mac Edition
Architecture
TeraScale 2 (2009−2015)
TeraScale 2 (2009−2015)
GPU code name
Cypress
Whistler
Market segment
Desktop
Desktop
Release date
January 2013
January 2011
Interface
PCIe 2.0 x16
MXM-A (3.0)
Supplementary power connectors
2x 6-pin
-
Core clock speed
850 MHz
725 MHz
Floating-point performance
2,720 gflops
696.0 gflops
Manufacturing process technology
40 nm
40 nm
Number of transistors
2,154 million
716 million
Pipelines / CUDA cores
1600
480
Power consumption (TDP)
175 Watt
35 Watt
Texture fill rate
68.00
17.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
512 MB
Memory bus width
256 Bit
128 Bit
Memory clock speed
4200 MHz
3600 MHz
Memory bandwidth
134.4 GB/s
57.6 GB/s
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
HDMI
+
-
DirectX
11.2 (11_0)
11.2 (11_0)
OpenCL
1.2
1.2
OpenGL
4.4
4.4
Shader Model
5.0
5.0
Vulkan
N/A
N/A