Hi all, I'm an old hat at overclocking, but mostly I browse the forums only when I need some specific info. This is one of those times. I've built 10-15 computers of my own, the last being an AMD Athlon64 3200+ which is still rockin' hard after a year and a half. Previous to that, I still have 4 of my P4 systems, all successfully overclocked to almost 50%. System 0 - Abit BP6 w/2x400MHz CPU's oc'ed to 600Mhz (retired) System 1 - Abit BE7-RAID w/P4 1.8a oc'ed to 2.6GHz System 2 - Abit IT7-Max w/P4 1.6a oc'ed to 2.4GHz System 3 - Abit IT7-Max w/P4 2.0a oc'ed to 2.8GHz System 4 - Abit IT7-Max2 2.0 w/P4 1.6a oc'ed to 2.4GHz As you can see, I found a good bunch of "a" spec processors that overclock very well. System 5 - still trying to get this system up and running and losing patience fast! Asus P4C800-E Deluxe rev 2.00 CPU 1 - P4 Mobile P4 1.6/3.06 SL726 CPU 2 - P4 2.4C SL6WF CPU 3 - P4 3.0C SL6WU ZALMAN CNPS 7000-Cu 2x512 Crucial Ballistix PC-4000 RAM eVGA 6800GS 256MB AGP video card 200GB Seagate 100GB WD NEC ND-3500A DVD burner Power supply: 380W Antec True380S Basically I can't even get this board to post. I bought my first P4C800-E DLX 2.00 on eBay (seller said he was parting out a killer system and the mobo worked flawlessly) and the 3.06 mobile P4 to see how far it could overclock. Well, it would POST and actually install the OS, but I could never get it to hold anything other than 1.6GHz. It would always say "Overclocking failed" and stop. The only thing I could do was hit F2 (or was it F1?) to load defaults and continue on. If I changed the FSB, it would always force me to revert back to stock settings. So, I bought another P4C800-E DLX 2.00. Everything else is the same. Now, NONE of the CPU's I have will even post. Not even the 3.06 that I KNOW works good. The system turns on but that's it. I've tried the DVI and VGA connectors on my video card, nothing. Tried resetting the CMOS, nothing. Tried known good 300W power supply, nothing. Once, and only once, did I get the female voice to tell me something, but it was so noisy in here, I couldn't make out what it was saying. I am leery about pulling a CPU from my other P4 systems because all of the HSF setups I used are not stock Intel units. They are the kind that bolt onto the motherboard and I would have to pull the entire motherboard out just to yank the CPU. Not only that, but none of them support 800MHz FSB CPU's, so I can't test anything other than on this motherboard. Is it possible to overtighten the two screws on the Zalman HSF setup? Does anyone have ANY suggestions? I am at my wits end here. I am ready to ditch this setup and go with a brand new P4 775 setup or maybe another AMD setup. Only thing is, I have a brand new AGP video card and most new mobo's are using PCI-E. I've searched quite extensively, but all I'm trying to do is get this machine to at least POST. Thank you, .:Christian:.