Radeon HD 6770M Mac Edition vs GeForce GT 640M

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Primary details

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

Place in the ranking843not rated
Place by popularitynot in top-100not in top-100
Power efficiency5.14no data
ArchitectureKepler (2012−2018)TeraScale 2 (2009−2015)
GPU code nameGK107Whistler
Market segmentLaptopLaptop
Release date22 March 2012 (12 years ago)28 January 2011 (13 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 cores384480
Core clock speedUp to 625 MHz725 MHz
Boost clock speed645 MHzno data
Number of transistors1,270 million716 million
Manufacturing process technology28 nm40 nm
Power consumption (TDP)32 Watt35 Watt
Texture fill rate20.0017.40
Floating-point processing power0.48 TFLOPS0.696 TFLOPS
ROPs168
TMUs3224

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
Bus supportPCI Express 2.0, PCI Express 3.0no data
InterfacePCIe 3.0 x16MXM-A (3.0)

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 typeDDR3\GDDR5GDDR5
Maximum RAM amount2 GB512 MB
Memory bus width128bit128 Bit
Memory clock speed900 MHz900 MHz
Memory bandwidthUp to 64.0 GB/s57.6 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
HDMI+-
HDCP+-
Maximum VGA resolutionUp to 2048x1536no data

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

3D Blu-Ray+-
Optimus+-

API compatibility

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

DirectX12 API11.2 (11_0)
Shader Model5.15.0
OpenGL4.54.4
OpenCL1.11.2
Vulkan1.1.126N/A
CUDA+-

Pros & cons summary


Recency 22 March 2012 28 January 2011
Maximum RAM amount 2 GB 512 MB
Chip lithography 28 nm 40 nm
Power consumption (TDP) 32 Watt 35 Watt

GT 640M has an age advantage of 1 year, a 300% higher maximum VRAM amount, a 42.9% more advanced lithography process, and 9.4% lower power consumption.

We couldn't decide between GeForce GT 640M and Radeon HD 6770M 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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NVIDIA GeForce GT 640M
GeForce GT 640M
AMD Radeon HD 6770M Mac Edition
Radeon HD 6770M Mac Edition

Comparisons with similar GPUs

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Community ratings

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3.7 312 votes

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Questions & comments

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