How can you set a Rog Swift to 75hz???

[l88bastard]

I am trying to match the resolution & refresh rate of my Rog Swift to match my Oculus Rift so I don't have the bad jitters that you get from differing displays with different refresh rates when I run the Oculus in Extended mode.

I thought setting the Rog Swift to 75hz would be a simple task as I am running a GTX980 and Nvidia custom resolution tool is very easy to use. However, I get the blank screen "out of Range" message every time I try and create a custom 75hz resolution. I am spoiled from the Korean Catleap displays when I could set my monitor to ANY refresh rate that I wanted between 30-120hz

My goal is 1920x1080 @75hz and right now the Rog Swift will only do 60hz, 85hz, 100hz, 120hz & 144hz....so you would think 75hz would be a breeze! NOPE! Out of Range.....aaarrrrggghhhhhhh

Does anybody have any advice!!!! I am pulling my hair out!

[Falkentyne]

Probably can't.
ROG Swift doesn't have a scaler as the gsync module controls everything.
So that would mean that every resolution that isn't native is GPU scaled from 1920x1080, and if native doesn't work at 85 hz, you may be out of luck unless you can do some bizarre custom timings and hope it works.

The Benq XL2720Z can run at 75 and 85hz via custom resolution as long as it's native. But "custom" CRT resolutions (resolutions lower than 1920x1080) show "out of range" around 82 to 90 hz, (75 hz is still fine) BUT at least you STILL get a screen that is fully usable (you can close the out of range popup but can't access the OSD if that happens).

Probably a bug coming from the monitor's analog dsub mode where the only supported resolutions are 1920x1080@60hz, and lower resolutions at 60, 75 and 120hz (100hz has to be forced). Select 85 hz in VGA analog mode and it says "out of range" again, even though you get a fully working image.

You can try changing the timings around to see if you can get a non black screen at 85 hz. Every monitor SHOULD be able to run at native resolution at 85 hz. I mean if the buggy Benq can do it (when it can't do it at lower than native...)

As an example of tricking the monitor:
When using the ToastyX pixel clock patcher, if you patch the DVI single link limits, running 1920x1080@85 hz will cause a "Incorrect cable" (which you can't remove) error (and also a screen that keeps resetting), on the XL2720Z. The same thing happens on the VG248QE, EXCEPT you can actually CLOSE the incorrect cable error and still use the OSD and the monitor fully. The cable error happens because the monitor is expecting a dual link DVI signal at this refresh rate, but the single link dvi limit was increased, so it's getting a single link signal at an improper refresh rate.

But if you use a Vertical Total tweak on the Benq (e.g. 1350 VT), the monitor switches to the 60 hz backlight pulse widths, because it switches to 60hz whenever the timings go too far away from defaults, and thinks it's getting a 60hz signal (which is fully within single link limits), so the cable error doesn't appear anymore.

Maybe you can try raising the Vertical Total and see if that works with the Swift.

[RealNC]

Does 72Hz work? Or 70?

If yes, then that could mean the display can't go below 85Hz, and 60Hz is internally doubled to 120Hz (which would make 72Hz doubled to 144Hz.)

You might also try to overclock the display to 150Hz, so that 75Hz would look perfect (doubled.)

[l88bastard]

The only resolutions that work are 60,85,100,120 & 144. Everything else produces an out of range signal. I have tried disabling UMLB, disabling Gsync, etc, etc, but nothing works.

Does anybody know of any cheap 1080p 75hz displays? I will just buy one of those to use with my Oculus Rift instead of deal with this nightmare any longer.

[RealNC]

Well, for what it's worth, I run my old-ish 60Hz monitor (XL2370) at 77Hz. It can run at anything from 46Hz to 77Hz with very fine granularity; I made a 47.952Hz (for 23.976FPS content), for example. Zero frame skipping at all timings.

It's quite strange that more high-end monitors are so limited to what timings they accept. I would have assumed that there's no reason why a monitor can't just run at whatever timings you want.

[RubyX]

I've had the same issue (also for Oculus Rift usage).
The Swift will accept 60, 85, 100, 120 and 144 - and generally also +/-1 Hz for each of those (so 59 or 61 work, 58 or 62 don't).

But for what it's worth, 85 actually seems to work perfectly fine and let Rift software run at a smooth 75 fps. Have you tried that?
120/144 Hz doesn't do the same (Rift games are then stuck at 37 fps instead).

Makes no sense whatsoever, but as long as it works...

[masterotaku]

Wow, this is bad. So Doom 3 (original version) can't be played smoothly in this monitor. It requires exactly 62.5Hz unless you "unlock" fps, making it smooth at any fps, but affecting game speed if it's below or above 62.5fps.

[Trip]

Wow, this is bad. So Doom 3 (original version) can't be played smoothly in this monitor. It requires exactly 62.5Hz unless you "unlock" fps, making it smooth at any fps, but affecting game speed if it's below or above 62.5fps.

There is this technology called gsync on this monitor which allows you to play at ANY fps/hz the only trouble this poster is having is to use the swift in conjunction with the occulus rift. I really dont see the big fuss tbh since you can only look at one screen at a time. So when you watch the other screen the fps/hz is not synchronized correctly resulting in stutter but the main screen will be just fine.

[Chief Blur Buster]

As a workaround, use a higher refresh rate, and then use fps_max 75 if you're running a Source Engine game. It's not the same as setting this display to 75Hz, but will run the monitor at a perfectly synchronized 75fps. You will not have ULMB at this refresh rate, however...

The tricky part is running the framerates smooth on this monitor, simultaneously with smooth on the Oculus Rift (75Hz low persistence mode).

[Chief Blur Buster]

Does anybody know of any cheap 1080p 75hz displays? I will just buy one of those to use with my Oculus Rift instead of deal with this nightmare any longer.

The cheapest 1080p display capable of 75Hz (including strobing), is the BENQ XL2411Z.

It can set refresh rate in sub-Hz increments, and can strobe at any refresh rate from 60Hz through 144Hz in 1Hz increments, unlike LightBoost. It is compatible with Blur Busters Strobe Utility. It is not as good color as the ROG PG278Q however, but does have a better strobed picture than ASUS VG248QE LightBoost.