Question about overclock

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GFresha
Posts: 83
Joined: 01 Mar 2019, 17:28

Question about overclock

Post by GFresha » 23 Nov 2019, 12:07

Have a 144 hz xb271hu monitor but its possible to overclock it to 165 hz which would improve my input delay (super minor) from 141 fps cap to 162 cap for gsync. But I heard somewhere that this overclock actually increases monitor response time and not actually lower it, so if that's the case then no thank you! If response time increases then whats the reasoning behind overclocking the monitor if ever?

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jorimt
Posts: 916
Joined: 04 Nov 2016, 10:44

Re: Question about overclock

Post by jorimt » 23 Nov 2019, 14:10

I have the same monitor.

The reasons are 1, marketing hype, and 2, you are genuinely getting a 21Hz refresh rate increase at the cost of slightly worse GtG performance (on this panel, at least).

While I wouldn't, I'm sure there are those that prefer the choice of an extra 21Hz over slightly worse ghosting.

As for the actual input lag benefit of 165Hz over 144Hz on the same monitor, correct, the difference would be very minor (0.8ms frametime difference, to be exact, which translates to around <1ms of an overall possible input lag reduction over 144Hz).

All told though, there's no harm in overclocking this display, so you could always give it a try and see if you can spot the overdrive difference in this test between the two refresh rates:
https://www.testufo.com/ghosting
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Display: Acer Predator XB271HU OS: Windows 10 Pro MB: ASUS ROG Maximus X Hero CPU: i7-8700k GPU: EVGA GTX 1080 Ti FTW3 RAM: 32GB G.SKILL TridentZ @3200MHz

GFresha
Posts: 83
Joined: 01 Mar 2019, 17:28

Re: Question about overclock

Post by GFresha » 23 Nov 2019, 15:06

When I OC to 165 hz, ghosting is not visible using the site you provided.

Why would people prefer an extra 21 hz? For those who use gsync I guess I kinda would understand it cos they cap at 141 so extra 21 hz means a cap at 162 which means slightly less input lag (again super minor).

Does an extra 21 hz make the screen a little more clear maybe?

If the extra 21 hz would mean I get lower response times I would jump on it instantly but as you mentioned its has slightly worse gtg so their is probably no reason to go up at all.

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jorimt
Posts: 916
Joined: 04 Nov 2016, 10:44

Re: Question about overclock

Post by jorimt » 23 Nov 2019, 16:50

GFresha wrote:When I OC to 165 hz, ghosting is not visible using the site you provided.
Good, then stay at 165Hz if you'd like; up to you.
GFresha wrote: Why would people prefer an extra 21 hz? For those who use gsync I guess I kinda would understand it cos they cap at 141 so extra 21 hz means a cap at 162 which means slightly less input lag (again super minor).
Yup.

There's also probably a psychological factor for some where they feel they're getting their money's worth with 165Hz, whereas 144Hz makes them feel like they're not getting everything they can out of it.
GFresha wrote: Does an extra 21 hz make the screen a little more clear maybe?
Slightly.
GFresha wrote: If the extra 21 hz would mean I get lower response times I would jump on it instantly but as you mentioned its has slightly worse gtg so their is probably no reason to go up at all.
Again, if you didn't notice any worse overdrive in the motion test when compared to 144Hz, then feel free to stay at 165Hz.

TFT Central tested 165Hz vs. 144Hz (different brand/model, virtually the same panel), and they said the GTG increase with 165Hz was a very minor difference that some may not even notice visually:
https://www.tftcentral.co.uk/reviews/as ... erclocking
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Display: Acer Predator XB271HU OS: Windows 10 Pro MB: ASUS ROG Maximus X Hero CPU: i7-8700k GPU: EVGA GTX 1080 Ti FTW3 RAM: 32GB G.SKILL TridentZ @3200MHz

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