Radeon RX 550X 640SP vs GeForce 945A

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Primary details

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

Place in the ranking633not rated
Place by popularitynot in top-100not in top-100
Power efficiency10.49no data
ArchitectureMaxwell (2014−2017)GCN 4.0 (2016−2020)
GPU code nameGM108Baffin
Market segmentLaptopDesktop
Release date13 March 2015 (9 years ago)11 April 2018 (6 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 cores384640
Core clock speed1006 MHz1019 MHz
Boost clock speed1189 MHz1071 MHz
Number of transistorsno data3,000 million
Manufacturing process technology28 nm14 nm
Power consumption (TDP)33 Watt60 Watt
Texture fill rate28.5442.84
Floating-point processing power0.9132 TFLOPS1.371 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).

InterfacePCIe 3.0 x8PCIe 3.0 x8
Lengthno data145 mm
Widthno data2-slot
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 amount1 GB2 GB
Memory bus width64 Bit128 Bit
Memory clock speed1253 MHz1500 MHz
Memory bandwidth40.1 GB/s96 GB/s

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 outputs1x DVI, 1x HDMI, 1x DisplayPort
HDMI-+

API compatibility

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

DirectX12 (11_0)12 (12_0)
Shader Model5.16.4
OpenGL4.64.6
OpenCL1.22.0
Vulkan1.1.1261.2.131
CUDA5.0-

Pros & cons summary


Recency 13 March 2015 11 April 2018
Maximum RAM amount 1 GB 2 GB
Chip lithography 28 nm 14 nm
Power consumption (TDP) 33 Watt 60 Watt

GeForce 945A has 81.8% lower power consumption.

RX 550X 640SP, on the other hand, has an age advantage of 3 years, a 100% higher maximum VRAM amount, and a 100% more advanced lithography process.

We couldn't decide between GeForce 945A and Radeon RX 550X 640SP. We've got no test results to judge.

Be aware that GeForce 945A is a notebook card while Radeon RX 550X 640SP is a desktop one.


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 945A
GeForce 945A
AMD Radeon RX 550X 640SP
Radeon RX 550X 640SP

Comparisons with similar GPUs

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Community ratings

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Questions & comments

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