Radeon HD 6770M and Radeon HD 6870M - video card comparison
Radeon HD 6770M
Radeon HD 6870M
Architecture
Terascale 2 (2009−2015)
Terascale 2 (2009−2015)
GPU code name
Whistler-XT
Granville-PRO
Market segment
Laptop
Laptop
Release date
January 2011
January 2011
Interface
MXM-A (3.0)
MXM-B (3.0)
Core clock speed
675 / 725 MHz
675 MHz
Floating-point performance
696.0 gflops
1,080.0 gflops
Manufacturing process technology
40 nm
40 nm
Number of transistors
716 million
1,040 million
Pipelines / CUDA cores
480
800
Power consumption (TDP)
35 Watt
50 Watt
Texture fill rate
17.40
27.00
Memory type
GDDR5
DDR3, GDDR3, GDDR5
Maximum RAM amount
1 GB
1 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
800 MHz
1000 MHz
Memory bandwidth
57.6 GB/s
64 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
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