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Acer RT280K overclock

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mackerel

Member
Joined
Mar 7, 2008
With the news today that nvidia will be introducing a level of support for FreeSync, I thought I'd get to know my only FreeSync monitor better by overclocking it!

On the manufacturer's webpage, it lists the vertical refresh rate as 23 - 80 Hz. Normal display settings stop at 60 Hz, so can I get a bit more? I don't recall trying to OC a display before. System has a GTX 970 in it with current driver. Went into custom resolutions and had a play.

With timings set to automatic, I started at 3840x2160. Went up to 70 Hz no problem. 72 Hz fine. 75 Hz, nope, blank screen. 73 Hz, nope. Ok, some limit there.

Next was 2560x1440. Found same again, 72 Hz ok, 73 Hz blank screen. Is this a hard limit?

Ok, one last try at 1920x1080. 72 Hz ok. 75 Hz ok. 80 Hz gave "input not supported" message on display, as opposed to blank screen before. Back off to 79 Hz, ok.

I wonder if this is then some bandwidth limitation, but if so, why same limit for both 1440p and 2160p? There are options in the menu for other timing methods which I haven't tried yet, and I wouldn't know where to start with manual timings.
 
OP
mackerel

mackerel

Member
Joined
Mar 7, 2008
Colours and general image quality is in the ball park of a good TN panel. Gaming I've done little of in part due to the 60 Hz stock operation and difficulty of driving that to 4k. Now that I have a 2070 connected to it, and I know I can increase max refresh to 72 Hz, and the "at your own risk" FreeSync support in the nvidia drivers yesterday, I aim to revisit this i the near future.
 

diaz

Member
Joined
Aug 27, 2007
Location
Canada
Thanks, what about scaling to 1440 or 1080; does it still look decent or does it fall appart into fuzz land?
 
OP
mackerel

mackerel

Member
Joined
Mar 7, 2008
I actually often run it at 1440 or 1080, depending on what I'm doing at the time. It's obviously rescaled with some softening so it isn't hard blocky look.