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Iris Plus 655 / NUC8i7 refresh rates


Dear friends,

I have a question about refresh rates. I've read on the official specifications that the maximum resolution is 4k at 60 fps, but what about the in-betweens?

For example, can it handle 1440p at 165hz? I'm not talking about video games, which would depend on the game, but like browsing the web and using windows apps etc.

Thank you,


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3 Replies
Super User Retired Employee

Presuming you have high-quality cables, the raw DisplayPort 1.2 signal can support the HBR2 maximum data rate of 17.28 Gb/s. According to the charts on the Wikipedia DisplayPort page (, a 1440p monitor can be supported at 165Hz non-HDR. For HDR, 120Hz can be supported (144Hz is listed as possible, even though it slightly exceeds the 17.28 Gb/s maximum, but only through 'non-standard timings').

If you have a motherboard that utilizes a LSPcon IC to convert from DisplayPort to HDMI 2.0, this provides you with a signal that can support a maximum data rate is 14.40 Gb/s. According to the Wikipedia HDMI page (, a 1440p monitor can (similarly) be supported at 144Hz non-HDR. For HDR, only100Hz can be supported (144Hz with 4:2:0 subsampling).

An external DisplayPort-to-HDMI converter (or USB-C-to-HDMI converter if DisplayPort Alt Mode is (also) supported by the USB-C port) can support a similar non-HDR result (I do not believe HDR can be supported in this configuration, however).

Hope this helps,



Thank you Scott. One last question, from your experience, is it worth having a higher refresh rate for everyday tasks? For example, I can definitely appreciate the extra smoothness of a higher refresh rate on my android phone, is it the same for PCs (excluding video games ofc)?

Super User Retired Employee

It is definitely the same or perhaps even more critical with larger displays. It all comes down to what you are willing to fork out for the (degree of) benefit.