Nvidia 9800 GTX+ cant aply more than 100 Hz

[Wlk]

First my config is older C2D with Nvidia 9800 GTX+ and two connected displays. One Qnix 27" and other old HP1740 with 1280x1024. I started experimenting in Nvidia CP, which allowed me to create custom resolution up to 100 Hz and it is working. I can test even higher resolutions, 120 Hz working fine, it just doesnt save it as custom. Anything beyond 100 Hz is not saved.

So I tried to patch drivers, which resulted in same behavior - Nvidia CP doesnt save anything more than 100 Hz.

So I used CRU to add refresh rate profiles (100,110,120), disabled "Include extension block" and rebooted as requested. Win7 booted up to login screen, but strangely Qnix didnt turn on - stayed in powersave mode, unlike before where it was powered up just blank as other LCD is setup as master. After login my system freezes, monitor switching on/of, but mouse is stuck, cant do anything. Seems to me like nv driver restart loop - have to manually reset PC. Only chance to get to desktop is to reboot in low-res mode and reset CRU, reboot and then its working.

Any idea how to get more than 100 Hz?

[ToastyX]

Your video card is too old. The patch is for 400-series or newer cards only. Chances are 120 Hz doesn't even work. Testing the resolution may look like it's setting the refresh rate, but it's probably just staying at the previous refresh rate. 100 Hz might not be working either. Have you verified that it's actually running at 100 Hz?

[Wlk]

Changed gfx to newer gtx 670 and its working fine now. OC up to 100hz stable, 110 shows some minor glitches, 120hz picture completely messed up. Do you thik it is worth to try some better shielded cable?

[ToastyX]

Some people have had success with a better cable, but supposedly the cable that comes with the QNIX is pretty good. Have you tried adjusting the timing parameters? Set the vertical front porch and sync width to 1, and set the totals to 2652x1445. That should help with 110 Hz at least. Your monitor might not be able to handle 120 Hz.