The original P4S800 series didn't have a PCI lock which really sucked when you tried overclocking. I haven't looked at the specs of the one you ordered, but if it does indeed have the PCI lock, then it'll be ok with your Celeron. Probably no reason to spend a lot of cash on socket 478 anyway since it's a dying platform. Looking down the road, I'd be careful about what P-4 to get when you decide to upgrade. That probably is not the best Prescott overclocking motherboard. In case you didn't know, there are different P-4 cores. Your Celeron 2.2 is based on the Northwood core. Most new P-4 processors will be Prescott cores which run hotter and are power sucking pigs (but on the right system they are great overclockers if you have cooling and PSU to handle 'em). To keep your budget down, I'd look for a used Northwood P-4 533 or 800 bus CPU or maybe a Celeron D (yes, they are a Prescott, but they run a little cooler and are cheap, plus they O/C great). Most of the 2.4, 2.53, and 2.66 Celeron D bad boys will O/C 3.5 to 3.8 gig with good cooling. Heck, most of the time they can do 3.0 to 3.2 gig on stock cooling and default voltage. Your current 2.2 Celly will be lucky to hit 2.8 gig and has half the cache of the Celly D.