Jackhead wrote on 2022-04-02, 12:16:

I run the monitor over HDMi (DVI-HDMI) on a GTX285.

I expect the issue may be with the DVI-HDMI converter EDID data not reporting that 1600 x 1200 @ 75 Hz is supported by the monitor.

I happen to have an XP system with 2 x GTX 285 and the one with a Dell 2007FP attached does not allow 1600 x 1200 @ 75 Hz, but the other does.

I wonder what SIV will report on your XP and 98 systems

Yes your right. I tryed a DVI-VGA cable now and i can choose 75Hz..
So i need to find a DVI-HDMi adapter that supports that.

2007FP @75Hz should be Frameskipping? no real 75Hz

That monitor uses AdaptiveSync, so you have to enable it on the monitor menu and use specific inputs, likely VGA or DisplayPort. XP can handle 75hz easy-peasy, but everything has to be set up properly. Try a DVI/DisplayPort cable instead of a DVi/HDMI one.

GokuSS4 wrote on 2022-04-04, 00:06:

2007FP @75Hz should be Frameskipping? no real 75Hz

Yeah tend to agree. Only some TFT/IPS can truly do 75Hz (BenQ BL2711U does). If you run Moninfo you can find out if it does, will be listed under Timing characteristics if it can though not 100%, it is a good guide 😀

red-ray wrote on 2022-04-02, 12:54:

I happen to have an XP system with 2 x GTX 285 and the one with a Dell 2007FP attached does not allow 1600 x 1200 @ 75 Hz, but the other does.

GokuSS4 wrote on 2022-04-04, 00:06:

2007FP @75Hz should be Frameskipping? no real 75Hz

Horun wrote on 2022-04-04, 01:15:

Yeah tend to agree. Only some TFT/IPS can truly do 75Hz (BenQ BL2711U does). If you run Moninfo you can find out if it does, will be listed under Timing characteristics if it can though not 100%, it is a good guide 😀

Are you taking in general or just about 1600 x 1200? If a monitor reports @75Hz then 75Hz can be selected, Frameskipping may happen, but there is no way to know this from what EnumDisplaySettingsEx() reports.

Read what I specified and look at the panel again there is no green blob on the 1600 x 1200 line and it's 1600 x 1024 that can do 75Hz

Yes I see the 75Hz is not present on SIV Graphics mode which actually follows the spec on the Dell 2007FP where in the manual it states:
"Vertical scan range: 56 Hz to 76 Hz, exception 1600 x 1200 at 60 Hz only"
What is odd is you have another Dell 2007fp that does the 75Hz if I understand your explanation ??

Horun wrote on 2022-04-04, 22:07:

What is odd is you have another Dell 2007fp that does the 75Hz if I understand your explanation ?

No, the system has 2 x GTX 285 + 1 x Dell 2007FP + 1 x Default Monitor.

The reason the GTX 285 to the right reports 1600 x 1200 @ 75Hz as possible is there no no monitor attached so no EDID data and all the modes that the GTX 285 is capable of are listed.

With 1 x Dell 2007FP + 1 x Dell 2407WFP connected things are very different

My 2007FP definitely skips frames when it receives anything above 60Hz over DVI. The OSD says that the signal being received is 75Hz, for example) but all tests (Pixperan, https://www.vsynctester.com/ , subjective testing in Doom under DOS, etc ) indicate frames are being skipped .

Re: Widescreen monitors and 4:3 aspect ratio compatibility thread

AFAIK, everyone on Vogons who has tested theirs and has reported on it has had the same experience .

RetroGamer4Ever wrote on 2022-04-04, 00:32:

That monitor uses AdaptiveSync

Its an ancient monitor, it even still has composite. No adaptive sync there, not that it would make any difference.

Plug&Play means driver will limit by what is reported by EDID. I remember using a trick of force installing monitor driver for something highend and manually setting refresh to 75Hz.
ReForce.exe https://m.majorgeeks.com/files/details/refreshforce.html
RefreshLock.exe https://m.majorgeeks.com/files/details/refreshlock.html
Custom Resolution Utility (CRU) https://www.monitortests.com/forum/Thread-Cus … ion-Utility-CRU, altho the last one states
-Windows Vista or later (Windows XP does not support EDID overrides)

btw frame skipping by the monitor - Iv got Belinea 10 20 05 (1600 x 1200) that frameskips at 60Hz 😁 Have to manually force it to 50Hz to get fluid motion.