Help! What did I do?

[Silversierra]

Help me please! I was trying my memory at a faster timing on my vnf4 ultra, and now the computer won't post, what can I do? Please don't tell me I killed it? I've never tried this before. Can I reset the cmos or something? My cpu light just flashes when I turn it on. No display signal. Help!

 

[FastEddie]

Clear the cmos.

 

[Silversierra]

Ok I looked in the manual, and it says if the bios gets corrupted, it will automatically revert to optimized defaults, but it didn't.

 

[Silversierra]

I found the cmos jumper and switched it. Now it's working again. What went wrong? I was trying to get it to run at 2.5-3-3-7 rather than 2.5-4-4-8. Is that too much of a jump?

 

[FastEddie]

Alot of times when you go for more aggresive memory timings, you also need to kick the vdimm (memory voltage) up just a tad.

 

[DerKaiser]

Maybe you should only change one parameter at a time. What type and brand of memory do you have? On my A8N-SLI the default RAM voltage is way below what my Crucial Ballistix is rated for. Bumping it up to the recommended voltage was needed for overclocking.

 

[Silversierra]

Kingmax super ram "the overclocker's choice"(it actully says that) lol. I haven't checked the voltage.

 

[montag451]

should be poking it upto 2.7 or even possibly 2.8v for the memory voltage