bbone

Unless I'm mistaken, older early Forceware drivers (aka Detonators back there) has a refreshrate problem. On DVI was possible only 60Hz. At least my old beta ones, 45.28, can't seems to show more that 60Hz on LCD monitor pluged into the old 5600XT cardie using DVI connection - while the same drivers did not have a problem with 100Hz refresh on CRT.

So, couple of questions. First - I'm right these old drivers are 60Hz on DVI limited?

Second - in witch first version of Forceware drivers this 60Hz DVI limit was fixed?

Third - how the fix looks like? Eg. it is possible to somewhat inject it into more early Deton... Forceware drivers?

bbone

After some Windows install tweakings, I decided to "give it a try" and check out 53.03 WHQ drivers for the weird "60Hz only" problem. Much to my dismay, the "60Hz only" problem seems to persist.



Dunno why. Even in lower resolution the driver "force" 60Hz. Is there ANY way to lift this limit? Im affraid that if I use ReForce and force the refresh higher, then upon reboot I got BSOD "inacessible device"

Not that there is anything wrong with BSOD, yet I would rather see another result


Forceware (I still like the old Detonators better...) 81.95 WHQ - still 60Hz only:



I beginning to feel that the problem is "somewhere else". I checked the bios setting and yes, there it is - the DDC scanning was skiped on the boot, so it might do somehing bad. Changed it, but no difference... Maybe reinstall again?

Is there any way to check if the GFX card bios properly reporting the capability of more Hz or not? The problem was not when I used the same card with VGA output and CRT monitor, yet using DVI and LCD monitor I running into a 60Hz wall ...



Looks like Linux users find a way:
Appendix*D.*X Config Options
Now let's hope I can find a way to fix this problem in Windows too...

I reasonably believe that since the 5600XT can do 2048x1538 pixels in 80Hz refresh, then it sure can do 1280x1024 in 75Hz. eVGA says 5600XT it can do 150Hz in 1280x1024:
www.evga.com/products/pdf/N317.pdf

As the Linux solution suggest, the drivers cap the refreshrate to 60Hz, because they detect "some lower quality TMDS encoders are only rated to drive DFPs at 60Hz"... But since the very same TMDS encoder can give me output resolution of 2048x1538 pixels in 60Hz refresh, then sure as hell it can give me 1280x1024 in 75Hz. As on Linux

Now the question is only how to duplicate the Linux nVidia drivers option "AllowNon60HzDFPModes". Anyone can shred some light at this?

I, personally, see only two ways.
1) change/patch/modify the drivers somehow to allow the non 60Hz DFP modes even on 5600XT card
2) change/patch/modify the GFX card bios to not report lower quality TMDS encoder, thus allowing drivers to set up higher refreshrates

Who can help me to get same results on Windows as on Linux are possible?

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Disclaimer: Any errors in spelling, tact, or fact are transmission errors.

CitySlicker

Under Windows DVI defaults to 60Hz when the monitor does not report V-refresh properly. However, you may be well right that those old drivers can't do more than 60Hz as, at the time being, there were no digital screens with higher refresh rates.

.

IvanV

I don't think that your current monitor can go higher than 60Hz. You used to have a CRT and they were different, the picture on them would fade away very quickly if it were not refreshed, that's why, with them, 60Hz was the bare minimum and higher values were highly desirable or else the picture would flicker noticeably. On the other hand, the picture on an LCD will never fade away on it's own and does not flicker and that's why most LCD monitors only support one refresh rate, 60Hz.

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Tipstaff

Technically the BenQ FP75G can do 75Hz at 1280x1024. The thing to look at here is your monitor driver. If you use the driver that came with your monitor, or a driver after the fact for your monitor, it could be that the settings within the driver have it capped at 60hz. You might want to try the standard Plug & Play driver, or try the below suggestion.

If you are running XP give THIS article a read. Just remember that at 1280x1024 your max Hz is 75Hz, so don't go above that.

BTW, the actual listing for your monitor should be under {4D36E96E-E325-11CE-BFC1-08002BE10318}.

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