Computer stopped booting

[Bravo]

Here's the ram...http://www.directdial.com/RM12864AA667.html

in my bios the minimum manual voltage was 1.8.. the next step was 1.85 it didn't seem to want to change on smaller increments... on 1.85 it said over clocking failed.. returning to default setup..

I'm a little unclear on the latency.. by default it's 5-5-5-15 but I assume if it's CL4 should it be 4-4-4-12?

[Ughmahedhurtz]

Strange. I can't find that part number or "Rendition" model name anywhere on Crucial's site. Maybe it's old/discontinued stuff?

Looking at their site, most of the current PC2-5300 is 1.8v, CL5. I'm highly suspicious of what you bought, to be honest. There is a lot of 533MHz stuff at CL4 that is "overclocked" to 667MHz from what I can see, which is disturbing. I'd be on the phone with Crucial finding out WTF you bought. :P

[moosejaw]

What should these settings for the ram be? Any link to a helpful page? I have 4x 1GB DDR2 667 ram, I think. Very small chance it could be 800

There is part of your problem. When filling all four ram slots the voltage regulator is taxed quite a bit. When using all four slots the ram voltage has to be boosted a bit to compensate for the voltage droop. Since you tried this already and overclocking failed you will have to underclock the ram and then bump the voltage again. -OR- Only use 2 ram slots with 2GB on each. There is a chance your ram may have been damaged already from being run in 4 banks with voltage droop/sag.

Remember the more ram slots used and higher memory size requires more power=more amps=drain on voltage regulator=voltage drop/droop/sag if the regulator is not up to par.