ATI Mobility Radeon HD 4850 Mac Edition vs HD 6770M

Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking825not rated
Place by popularitynot in top-100not in top-100
Power efficiency5.15no data
ArchitectureTeraScale 2 (2009−2015)TeraScale (2005−2013)
GPU code nameWhistlerM98
Market segmentLaptopLaptop
Release date4 January 2011 (13 years ago)28 August 2009 (15 years ago)

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores480800
Core clock speed725 MHz503 MHz
Number of transistors716 million956 million
Manufacturing process technology40 nm55 nm
Power consumption (TDP)35 Wattno data
Texture fill rate17.4020.12
Floating-point processing power0.696 TFLOPS0.8048 TFLOPS
ROPs816
TMUs2440

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Laptop sizemedium sizedno data
InterfaceMXM-A (3.0)PCIe 2.0 x16

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory typeGDDR5GDDR3
Maximum RAM amount1 GB512 MB
Memory bus width128 Bit256 Bit
Memory clock speed900 MHz850 MHz
Memory bandwidth57.6 GB/s54.4 GB/s
Shared memory--

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display ConnectorsNo outputsNo outputs

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX11.2 (11_0)10.1 (10_1)
Shader Model5.04.1
OpenGL4.43.3
OpenCL1.21.1
VulkanN/AN/A

Pros & cons summary


Recency 4 January 2011 28 August 2009
Maximum RAM amount 1 GB 512 MB
Chip lithography 40 nm 55 nm

HD 6770M has an age advantage of 1 year, a 100% higher maximum VRAM amount, and a 37.5% more advanced lithography process.

We couldn't decide between Radeon HD 6770M and Mobility Radeon HD 4850 Mac Edition. We've got no test results to judge.


Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.

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AMD Radeon HD 6770M
Radeon HD 6770M
ATI Mobility Radeon HD 4850 Mac Edition
Mobility Radeon HD 4850 Mac Edition

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Community ratings

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3.5 82 votes

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