Page 1 of 1

Samsung Q9 FreeSync Question

PostPosted: 05 Feb 2019, 19:10
by BlackGuyRX
I'm considering saving my pennies for a Samsung QLED mainly for it's FreeSync support but I wanted to know something. With FreeSync in 4K, it caps out at 60hz and you can have up 144hz in I believe both 1440p and 1080p. Is there any way possible to get just a little bit of a higher refresh rate on these models at 4K? I ask because a good chunk of the console and arcade games I emulate go outside 60hz just a little bit (60.61 for several early arcade games, 60.08hz for NES & SNES, etc)
I plan on eventually building a mini PC with multimedia and RetroArch/Lakka in mind and wanna take advantage of FreeSync via AMD and wanted to know if even squeezing a hair more refresh rate in 4K was possible.

I know I should probably wait for LG's upcoming OLED TVs since they're supposed to support 4K at naitive 120hz but i'm kinda paranoid about spending a lot on a TV that could end up getting burn-in.

Re: Samsung Q9 FreeSync Question

PostPosted: 08 Feb 2019, 01:18
by Chief Blur Buster
BlackGuyRX wrote:I'm considering saving my pennies for a Samsung QLED mainly for it's FreeSync support but I wanted to know something. With FreeSync in 4K, it caps out at 60hz and you can have up 144hz in I believe both 1440p and 1080p. Is there any way possible to get just a little bit of a higher refresh rate on these models at 4K?

Yes, I was able to overclock some 4K60 displays to around 61Hz (ish) or fractionally.

There is usually a ~1 Hz tolerance in many displays.
Overclock results are sometimes mixed, however.

BlackGuyRX wrote: I ask because a good chunk of the console and arcade games I emulate go outside 60hz just a little bit (60.61 for several early arcade games, 60.08hz for NES & SNES, etc)
I plan on eventually building a mini PC with multimedia and RetroArch/Lakka in mind and wanna take advantage of FreeSync via AMD and wanted to know if even squeezing a hair more refresh rate in 4K was possible.

One idea is to simply slow down emulation fractionally, e.g. 0.5% or 1% slower than realtime -- to make it fit within the Hz budget.

Also, if you plan to use variable refresh rate, you want roughly ~1Hz-3Hz headroom at 60Hz, so you want a VRR range extending to around 61Hz to 63Hz, for ultralow-lag 4K 60fps FreeSync.

There are other lag-reducing tricks such as RetroArch's RunAhead technique, though.