Vista - Graphic Cards "SLI" freezing.....

I build my own PC and install 2 x 8600GTS NVidia graphic card as my motherboard(ASUS M2N-SLI DELUXE) allowed it.
Unfotunatly each time I click on "SLI" (recommended) my pc freezes. I have to turn it off ,take off the SLI connector and restart it ...this happening for about 6 months now...
Of course I join the "SLI NVidia Forums Zone" straight away and I am still waiting for an answer...
I cannot beleive it so I decided to take my chance with you all guys,some of you might have an idea
I use Vista 32bit home premium
all the drivers are up to date..and still nothing even if I run the NVidia nTune it does not work
any little help will be so helpfull before I have to throw out of the window the SLI connector!!!!!!!!!

Maybe one of the videocards is broken, try one at a time, and if they both work, the SLI-Bridge could be broken too.

Hi Frenchy,

Do you have a HPET option in your BIOS? Try Disabling it and let me know the result.

(High Precision E... Timer)


Cheers
Steven

hello,
well the two car seems to be working well as both " are listed in Device Manager " and both are listed "as working fine" no problem with this device .....but if The SLI brodge is broken how could I found out and where to get a replacemant
thanks

Hi , thanks for the answer but sorry for my ignorance what is HEPT in BIOS and where to find if it is there in BIOS...once I know what to look for I will try to find out and let you know
thanks for the help

Hey Frenchy,

The option is called HPET or High Precision Event Timer, formerly known as Multimedia Timer and this affects the Graphics Card because it replaces the real-time clock with a less effective timer causing many graphical errors and rundll32 errors as its not able to compute the timing required for games or other applications.

Just look through your BIOS options for HPET, HPT (high precision timer) or similar then disable it and Im sure it will solve these issues.

A few others on this site and myself have had to disable this option to use Vista properly without the same problems you describe.

Steven

thanks for all that but in the BIOS under what or where will I find HPET? please thanks

It is in the BIOS.

I have seen a few board lately with SLI issues and they needed a BIOS fix to resolve them. Is your power supply 12V rail large enought to support the SLI?

Yes I have a PSU 750W..done the configuration before building the rig on a website and after telling everything I would have 550W was the best answer so I fiited a 750w PSU to be sure
now I now it is in BIOS i have told to look for it but could you be more specific under what heading a must I browse all th BIOS to find it ..if it is there
thanks

Your BIOS should have a SLI section that would have all the settings. Does your 750W have 60A @ 12V? Decent video cards can pull 26A each.

don't know about that one .....you caught me off guard there will have to check the specs of the PSU