Mobility Radeon HD 4850 and Radeon HD 6770M - video card comparison
Mobility Radeon HD 4850
Radeon HD 6770M
Architecture
Terascale 1 (2008−2010)
Terascale 2 (2009−2015)
GPU code name
M98
Whistler-XT
Market segment
Laptop
Laptop
Release date
January 2009
January 2011
Interface
PCIe 2.0 x16
MXM-A (3.0)
Core clock speed
500 MHz
675 / 725 MHz
Floating-point performance
800.0 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)
-
35 Watt
Texture fill rate
20.00
17.40
Memory type
GDDR3
GDDR5
Maximum RAM amount
1 GB
1 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
850 MHz
800 MHz
Memory bandwidth
54.4 GB/s
57.6 GB/s
Shared memory
-
-
Display Connectors
No outputs
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