Radeon R5 A255 vs Instinct MI8

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Primary details

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

Place in the rankingnot ratednot rated
Place by popularitynot in top-100not in top-100
ArchitectureGCN 3.0 (2014−2019)GCN 3.0 (2014−2019)
GPU code nameFijiTopaz
Market segmentWorkstationDesktop
Release date12 December 2016 (8 years ago)2014 (10 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 cores4096384
Core clock speed1000 MHz925 MHz
Boost clock speedno data940 MHz
Number of transistors8,900 million1,550 million
Manufacturing process technology28 nm28 nm
Power consumption (TDP)175 Wattno data
Texture fill rate256.022.56
Floating-point processing power8.192 TFLOPSno data
ROPs648
TMUs25624

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 x16PCIe 3.0 x8
Length152 mmno data
Width2-slotno data
Supplementary power connectors1x 8-pinno data

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 typeHBMGDDR5
Maximum RAM amount4 GB1 GB
Memory bus width4096 Bit128 Bit
Memory clock speed500 MHz4 GB/s
Memory bandwidth512.0 GB/s64 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 outputsPortable Device Dependent

API compatibility

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

DirectX12 (12_0)12 (12_0)
Shader Model6.36.5
OpenGL4.64.6
OpenCL2.02.1
Vulkan1.2.1311.2.170

Pros & cons summary


Maximum RAM amount 4 GB 1 GB

Instinct MI8 has a 300% higher maximum VRAM amount.

We couldn't decide between Radeon Instinct MI8 and Radeon R5 A255. We've got no test results to judge.

Be aware that Radeon Instinct MI8 is a workstation graphics card while Radeon R5 A255 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 Instinct MI8
Radeon Instinct MI8
AMD Radeon R5 A255
Radeon R5 A255

Comparisons with similar GPUs

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Community ratings

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