XB240H Overclocks to 198 Hz!

[click4dylan]

I managed to overclock my xb240h to 198 Hz at 800x600 and 640x480 using CVT Reduced Blank in nvidia's custom resolution settings. I'd like to be able to get at least a 16x9 resolution working, but anything I try doesn't want to go past 144 Hz. I can't even get most resolutions working at 144hz even, such as 1024x769

[Falkentyne]

Most likely a fake report due to how the Nvidia control panel works. The driver gets tricked into thinking the refresh rate is higher than it actually is, but I would love to be proven wrong! Do a frameskipping test, please.

Someone got their XL2411Z to overclock to 180 hz also, the same way, but visually it looked no different than 144hz.
It was just GPU scaling the refresh rate basically.
TestUFO showed 180 hz but it looked identical framerate wise to 144hz.

As proof, he used ToastyX CRU and it went out of range at 145 hz.

[click4dylan]

It's true 198 Hz, the monitor itself shows it. I can't get nvidia to scale the resolution to aspect ratio/fullscreen no matter what I try. If there is ANY way you can help me figure out how to get nvidia to scale it bigger it would be a godsend. The screen is so small it's nearly impossible to play games on it at this refresh rate. There is a definite difference in 144 and 198 Hz, the screen is very bright and has a white tint to it and the colors are all wack, and I can see faint scanlines but overall the screen is unbelievably clearer in motion.

I tried to use toastyx CRU but the only resolution shown is 1920x1080 @ 60 Hz, and anything I add does not show up in windows. it has no effect.

EDIT: i just tried the UFO test and WOWW it looks like i'm using lightboost/ULMB, i can track the UFO perfectly. there's like basically no blurring at all!

[Falkentyne]

Ah nice then.
If you see scanlines then it definitely worked (the scanlines effect is similar to what you get when running in lightboost mode, and the Qnix monitors in the other thread here got that when pushed to 180-240 hz).

I wasn't sure because someone got the XL2411Z to 180hz using the Nvidia control panel --at 1920x1080--but I know for a fact that the Benq is firmware locked to 145hz, and testUFO reported 183hz (the highest he got). but he said that when he did visual tests, they were no different than 144hz.

Nice overclock!

[urut]

Im this dude who got 183hz on xl2411z (but in my case its nvidia bug :<) Can you post your timings picture?

[click4dylan]

I just set 800x600 32 bit 198hz progressive with CVT Reduced blank, and it worked instantly. But it also works at these settings:

800x600
199 Hz, 32bit progressive
H
800
48
32
1024
+

V
600
3
5
950
+
199.000Hz


But it's unusable at 800x600 because the screen is unscaled and you only get a tiny picture in the middle of the screen. Is there any way to make a custom refresh rate be scaled in nvidia? I would REALLLLLLLLLLLLY appreciate it if someone could help me on this


EDIT: I managed to get 153 Hz at 1920x1080 with these settings:
1920x1080
153 Hz 32 bit Progressive
H
1920
24
16
1950
+

V
1080
3
5
1098
+
153.000Hz

EDIT 2: After setting 153 Hz, i tried 155 Hz with automatic timings and it succeeded and is now running 155 Hz flawlessly at 1920x1080. Going to see if i can squeeze any more

EDIT 3: The most i can get out of the monitor at 1920x1080 is 156 Hz, without crashing the driver and requiring a reboot. To do that, create a custom resolution at 154 Hz using these settings:
H
1920
16
16
1943
+
V
1080
3
4
1098
+

Apply the new refresh rate of 154 Hz.

Now create another one, this time select Automatic timings, and select 156 Hz. It should work perfectly.

EDIT 4: the 1920x1080 refresh rate overclock is simply an nvidia bug. it isn't actually 156 Hz, neither is the 153 Hz. So back to 800x600 If anyone can help me with getting scaling to work I'd so appreciate it

[Q83Ia7ta]

Great! DVI or DisplayPort?

[click4dylan]

Great! DVI or DisplayPort?

DisplayPort

[click4dylan]

Update: Managed to get 193 Hz at 1024x768, still unscaled. Much more playable than 800x600, but i'd still like to get more.

Something is very weird about this monitor. It seems like it's the firmware that's telling the monitor "OK BLACK SCREEN NOW!", because if I try something like 59 Hz or 65 Hz under certain timings, it will show a black screen as well. It seems like there are magic numbers that makes the monitor boot up at a specific refresh rate instead of going to a black screen. Also, it seems like G-Sync is disabled on refresh rates > 144, which debunks nvidia's claims in that gsync has no limit and it's the panel that limits it.

now if i could just find the magic numbers to get 1920x1080 working, or 1600x900, or even 1280x960/1024

[Q83Ia7ta]

Also, it seems like G-Sync is disabled on refresh rates > 144, which debunks nvidia's claims in that gsync has no limit and it's the panel that limits it.

It's ok. After 144Hz there is picture quality degradation by panel so nvidia limits G-Sync.
If there will be 200Hz standard instead current one (144Hz) G-Sync will be working at 200Hz.