Custom Resolution Utility (CRU)

[TuN]

Hello there!

I'm having some issues with certain resolution / hz, and hopefully you guys can help me out.

I'm using Samsung SyncMaster T240, which uses native resolution 1920x1200 @ 60Hz

I saw in the monitor manual that I can use lower resolution at higher vertical frequency, and thought it would be useful for playing FPS games on my computer.

So I've decided to make a custom resolution 1280x1024 @ 75.025 Hz in CRU, since it doesn't allow me to select anything above 60 Hz when I right click on desktop -> Screen Resolution -> Advanced settings -> Monitor -> Screen refresh rate


I open up CRU, go to Detailed resolutions, click Add, select Manual Timing, I've entered 1280 x 1024 and 75.025 Hz, but the Horizontal Frequency and Pixel clock values are completely different than the ones on the monitor manual, and I can't change them all, since they correspond to each other -> CRU setting

So the manual says I should use:
75.025 Hz, 79.976 KHz, 135 Pixel Clock Mhz

And the CRU / monitor uses:
75.025 Hz, 79.458 Khz, 114.42 Pixel Clock Mhz

When I select this resolution on desktop ( or in game ), it apparently works at 75 Hz, but the monitor shows the message which says:

Not Optimum Mode
Recommended Mode :
1920 x 1200 60Hz

I can cancel the message once, but the monitor turns black after about a minute. It seems to do it everytime I set it to 75 Hz, even though it supports it.

Is there anything I can try?

I'm using Sapphire Radeon 7850 OC and Windows 7 x64.

I've also tried using PowerStrip, but it's outdated ( doesn't officially support Windows 7 ) and it doesn't allow me to use any custom resolution ( it is greyed out )

Any ideas would be greatly appreciated.