Radeon R9 M390 Mac Edition vs HD 7850M

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Primary details

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

Place in the ranking722not rated
Place by popularitynot in top-100not in top-100
Power efficiency6.10no data
ArchitectureGCN 1.0 (2011−2020)GCN 1.0 (2011−2020)
GPU code nameHeathrowPitcairn
Market segmentLaptopLaptop
Release date24 April 2012 (12 years ago)5 May 2015 (9 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 cores6401024
Core clock speed675 MHz958 MHz
Number of transistors1,500 million2,800 million
Manufacturing process technology28 nm28 nm
Power consumption (TDP)40 Watt80 Watt
Texture fill rate27.0061.31
Floating-point processing power0.864 TFLOPS1.962 TFLOPS
ROPs1632
TMUs4064

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 sizelargeno data
InterfacePCIe 3.0 x16PCIe 3.0 x16
Supplementary power connectorsno dataNone

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 typeGDDR5GDDR5
Maximum RAM amount2 GB2 GB
Memory bus width128 Bit256 Bit
Memory clock speed1000 MHz1365 MHz
Memory bandwidth64 GB/s174.7 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.

DirectX12 (11_1)12 (11_1)
Shader Model5.15.1
OpenGL4.64.6
OpenCL1.21.2
Vulkan1.2.1311.2

Pros & cons summary


Recency 24 April 2012 5 May 2015
Power consumption (TDP) 40 Watt 80 Watt

HD 7850M has 100% lower power consumption.

R9 M390 Mac Edition, on the other hand, has an age advantage of 3 years.

We couldn't decide between Radeon HD 7850M and Radeon R9 M390 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 7850M
Radeon HD 7850M
AMD Radeon R9 M390 Mac Edition
Radeon R9 M390 Mac Edition

Comparisons with similar GPUs

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Community ratings

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3.1 18 votes

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1.9 9 votes

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Questions & comments

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