Iris Plus Graphics 645 vs Radeon RX 455 OEM

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Primary details

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

Place in the rankingnot rated665
Place by popularitynot in top-100not in top-100
Power efficiencyno data20.34
ArchitectureGCN 2.0 (2013−2017)Generation 9.5 (2016−2020)
GPU code nameTobagoCoffee Lake GT3e
Market segmentDesktopLaptop
Release date30 June 2016 (8 years ago)7 October 2019 (5 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 cores768384
Core clock speed1050 MHz300 MHz
Boost clock speedno data1050 MHz
Number of transistors2,080 millionno data
Manufacturing process technology28 nm14 nm+++
Power consumption (TDP)100 Watt15 Watt
Texture fill rate50.4050.40
Floating-point processing power1.613 TFLOPS0.8064 TFLOPS
ROPs166
TMUs4848

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 x16Ring Bus
Length165 mmno data
Width1-slotno data
Supplementary power connectors1x 6-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 typeGDDR5System Shared
Maximum RAM amount2 GBSystem Shared
Memory bus width128 BitSystem Shared
Memory clock speed1625 MHzSystem Shared
Memory bandwidth104.0 GB/sno data
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 Connectors1x DVI, 1x HDMI, 1x DisplayPortPortable Device Dependent
HDMI+-

Supported technologies

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

Quick Syncno data+

API compatibility

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

DirectX12 (12_0)12 (12_1)
Shader Model6.36.4
OpenGL4.64.6
OpenCL2.03.0
Vulkan1.2.1311.3

Pros & cons summary


Recency 30 June 2016 7 October 2019
Chip lithography 28 nm 14 nm
Power consumption (TDP) 100 Watt 15 Watt

Iris Plus Graphics 645 has an age advantage of 3 years, a 100% more advanced lithography process, and 566.7% lower power consumption.

We couldn't decide between Radeon RX 455 OEM and Iris Plus Graphics 645. We've got no test results to judge.

Be aware that Radeon RX 455 OEM is a desktop card while Iris Plus Graphics 645 is a notebook 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 RX 455 OEM
Radeon RX 455 OEM
Intel Iris Plus Graphics 645
Iris Plus Graphics 645

Comparisons with similar GPUs

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Community ratings

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2.3 3 votes

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2.9 121 vote

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Questions & comments

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