Monitor Overclocking

DarthMol

New member
Have you tried overclocking your monitor? I must admit I'd never thought this was something that was possible, what does it even mean to "overclock" your monitor?

It simply means to up your monitor's refresh beyond it's default setting (for most standard monitors that 60Hz). These days you can pick up specialised gaming monitors that are rated for 120Hz or 144Hz but they are quite pricey to say the least. With monitor overclocking you can give your current monitor a bit of a boost.

Since I had seen guys mentioning overclocking their monitors (particularly on Carbonite) I thought I may as well give it a try. I recently bought a (3rd hand) Samsung S27B550 from a friend and some diagnostic or other (can't remember what) should my monitor to be capable of 75hz, so I figured I'd give it a go.

I came across this helpful article: https://www.maketecheasier.com/overclock-pc-monitor/

Also, it's good to note the disclaimer on that webpage:
Disclaimer
Overclocking your monitor is not recommended by manufacturers because it can cause it to become unstable. Even though plenty of monitors are capable of being overclocked, it’s still a process that puts more strain on them. I’ll be showing you how to do it safely in a way that’s kept my monitor overclocked and stable for two years now, but you’re still doing this at your own risk.

So I installed the patch for the AMD drivers and the CRU (Custom Resolution Utility) following the instructions and sure enough I managed to bump my refresh rate up from 60Hz to 70Hz - all seemed to be fine. While fiddling around I actually saw that with Radeon Settings it's even simpler to bump up the refresh rate, I may not even have needed to install the patch and CRU (although I think the patch helped ensure the cable bandwidth was unlocked - I'm using HDMI).

How to Overclock Your Monitor using Radeon Settings
In Radeon Settings click on the Display tab and you'll see this menu:

RS display.PNG

Click on + Create option under the Custom Resolutions section, you will now see a set of different values, one of which is the refresh rate. Here I changed it to 75Hz and then saved it.

RS CR.PNG

To activate I then right-clicked on the desktop, click Display Settings, Advanced Display settings, Display adapter properties and then the Monitor tab, from there I selected the 75Hz option.

It switched and seemed to be fine. There is a test to make sure you are not having any dropped frames: http://www.testufo.com/#test=framerates (it can be a bit finicky though and moans about browser stuttering but when working right it will give you a valid result if the frames are being rendered smoothly)
After that, go into a game and test out your new refresh rate, see if it feels right.

Apparently some generic Korean brand of monitors can be pushed up from 60Hz to 96Hz - but it is all dependent on your monitor. I've achieved a stable clock up to 75Hz and it does seems to make things smoother - even when not using Vsync in CS:GO where I run the game at about 200FPS.
 
Can this be done one LCD, LED and any other screens?
I know CRT screens are an overclockers dream.
But what about the rest of the screens and panels?
 
Yea I was curiousa about it a couple years back when i was still on carbonite. seems alot easier now than it was, if its actually a setting in AMD...unless that just gets unlocked by the CRU.

I remember struggling and struggling and I think i got to the point where testing for dropped frames was literally having to record the testufo thing and manually checking each frame for the different picture/number...and i was like, eh fukkit, 60hz is fine :D


EDIT: Heres the link test for actual frame drop testing - and yea you basically have to "record" and then make sure you can see the white block in every frame :p

very tedious

LAST EDIT:
heres the frame drop test method.... not worth the effort methinks

Frame Skipping Check: Test for dropped frames & missing display refreshes.
(1) Take photo of this screen with camera. Screenshots won't work. Use 1/5th second exposure or longer to capture multiple squares. If camera exposure can't be raised, decrease camera ISO and/or reduce monitor brightness, to make camera do longer exposures. If you see only 1 or 2 white squares in your photo, try again.

(2) Photo should not contain any popup messages. Take photo when you see "VALID" at bottom of page. The message "VALID" does not confirm frame skipping.

(3) Check photo for frame skipping. Compare to example good photo and example frameskipped photo. The photo should have a sequence of multiple solid squares, with no gaps in between. If there are gaps, then there is frame skipping. For testing refresh rate overclocking such as IPS 1440p 120Hz monitors or HDTV overclocking, close all other apps and browser tabs, run this test with nothing running, and check browser requirements. For an alternative, see Refresh Rate Multitool from shurcooL.
 
Last edited:
Interesting side note, some newer monitors come out box ready to be overclocked. I bought a an Asus monitor that said 165hz on the box itself, but it was actually 144hz. You have to manually overclock (push a button or two on the side of the monitor) to get the advertised refresh rate.
 
Can this be done one LCD, LED and any other screens?
I know CRT screens are an overclockers dream.
But what about the rest of the screens and panels?

the S27B550 is an LED monitor, so yea it can be done on those, but as you surmise, not as much as crt's...i still have nightmares about the ping and whine of a CRT monitor when you made its refresh rate higher than it was meant to be and then clicked apply...hehe.
 
Interesting side note, some newer monitors come out box ready to be overclocked. I bought a an Asus monitor that said 165hz on the box itself, but it was actually 144hz. You have to manually overclock (push a button or two on the side of the monitor) to get the advertised refresh rate.

I think that is where the real and artificial refresh rates come on as far as I know
 
I think that is where the real and artificial refresh rates come on as far as I know

Also gotta read that fine print!

Note:
1) 2560 x1440 @ 165Hz only works with DP port. The HDMI port only supports 2560 x 1440 @ 60Hz.
2) Only NVIDIA GeForce GTX 960 and above graphics card can support 2560 x 1440 up to 165Hz. Please contact the GPU manufacturers for detailed specification.
 
Also gotta read that fine print!

Yeah, it's the Asus ROG Swift 1440p 27" IPS G-Sync 165hz monitor - I'm using it with my 980ti's DisplayPort (DP) so I'm getting the full 165hz. Sounds like it was clocked at 144hz because of the DisplayPort thing
 
Some nice interesting replies. [MENTION=12607]mottamort[/MENTION] ya that test method seems like too much schlep really. So far I'm just going on feel, and CSGO feels nice and responsive, Mirror's Edge Catalyst goes well and it's a game that definitely needed the Vsync on otherwise so much of screen tearing. Will see how it goes. I would guess that pushing the refresh rate higher there may be issues, but I'm happy with the small bump up to 75Hz - haven't run that refresh rate since my old CRT.

It would be interesting to see if anyone can do the overclock purely using Radeon Settings, without patching and installing CRU
 
Back
Top