Overclocking a 2.4ghz Northwood

I'm on my first overclocking project (I am excited) and I'm short a little on know-how. Reading over faqs and guides on the subject I have a decent working knowledge of the goings-on between my processor, card slots, and ram. I'm running the Intel Northwood 2.4ghz 800mhz bus hyper-threading processor with a one-gig stick of PC-3200 DDR400 ram on a good asus motherboard.

I managed to get my box going at a little over 2.9 at stock voltage with my ram working at about 408mb bus speed, rock steady. No heat problems, but any higher than this (3.0ghz+, 416mhz memory bus or greater) and my memory has a coniption fit. It'll run under load for awhile, but inevitably (after about 15 minutes at 80-100% load) I'll get a program-fatal memory read error.

I'm posting because I'm not really certain what the problem is. I know my processor could get way over the frequency I'm operating it at now, but I'm really not certain what my fsb is. I know this processor sends data four times per cycle, and the frequency of the fsb is actually a multiple (the data transfers at a literal 200mhz) but how does the ram work? When my ram is at 416, is it trying to send more data over the motherboard's 800mhz bus (trying at 832mhz) and failing? Or could I possibly correct this by increasing my memory core voltage?

>>1
Ok there are a couple things you need to know about memory bottlecaps. You need to know if you ram is asycronous or synchronus. Your ram to pc clock ratio are crutal to your system. If you are 1:1 (sychronous) your ram will match whatever speed your processor is. Otherwize you will have to attempt to change the ratio of your PC clock to Ram clock. (I have no clue how to do this; I have an AMD and all AMD chipsets run sychronous.)
As for overvoting, it all depends on your temature on how much extra juice you can poor in the pipes. In addition Overvolting is not a fix all. You system will eventualy crash, it's just a matter of when. I have my 1.6ghz clocked to 1.9ghz with a +.7% overvot on processor and a +.2volt overvolt on my ram (this IS nessisary). My uptime is about 3 days. I was able to get my system up to 2ghz, but it's uptime at that point with a +3v and +10% overvots is about 20 minutes. Sorry I couldn't help you more with the ram issue.