Radeon RX 6900 XTX vs Pro 555X

Primary details

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

Place in the ranking504not rated
Place by popularitynot in top-100not in top-100
Power efficiency7.68no data
ArchitectureGCN 4.0 (2016−2020)RDNA 2.0 (2020−2024)
GPU code namePolaris 21Navi 21
Market segmentMobile workstationDesktop
Release date16 July 2018 (6 years ago)28 October 2020 (4 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 cores7685120
Core clock speed907 MHz2075 MHz
Boost clock speedno data2435 MHz
Number of transistors3,000 million26,800 million
Manufacturing process technology14 nm7 nm
Power consumption (TDP)75 Watt330 Watt
Texture fill rate43.54779.2
Floating-point processing power1.393 TFLOPS24.93 TFLOPS
ROPs16128
TMUs48320
Ray Tracing Coresno data80

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 x8PCIe 4.0 x16
Lengthno data267 mm
Widthno data2-slot
Supplementary power connectorsNone2x 8-pin

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 typeGDDR5GDDR6
Maximum RAM amount4 GB16 GB
Memory bus width128 Bit256 Bit
Memory clock speed1275 MHz2250 MHz
Memory bandwidth81.6 GB/s576.0 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 outputs1x HDMI 2.1, 2x DisplayPort 1.4a, 1x USB Type-C
HDMI-+

Supported technologies

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

FreeSync+-

API compatibility

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

DirectX12 (12_0)12 Ultimate (12_2)
Shader Model6.46.7
OpenGL4.64.6
OpenCL2.02.1
Vulkan1.2.1311.3

Pros & cons summary


Recency 16 July 2018 28 October 2020
Maximum RAM amount 4 GB 16 GB
Chip lithography 14 nm 7 nm
Power consumption (TDP) 75 Watt 330 Watt

Pro 555X has 340% lower power consumption.

RX 6900 XTX, on the other hand, has an age advantage of 2 years, a 300% higher maximum VRAM amount, and a 100% more advanced lithography process.

We couldn't decide between Radeon Pro 555X and Radeon RX 6900 XTX. We've got no test results to judge.

Be aware that Radeon Pro 555X is a mobile workstation card while Radeon RX 6900 XTX 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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AMD Radeon Pro 555X
Radeon Pro 555X
AMD Radeon RX 6900 XTX
Radeon RX 6900 XTX

Comparisons with similar GPUs

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Community ratings

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3.8 167 votes

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3.2 128 votes

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Questions & comments

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