Well first off you probably shouldn't have simply jumped it from 200 to 220. Increments of 3-5MHz would have been better on the RAM more than likely.
If you clear the CMOS you can boot up your computer though right and it POSTs and you're able to get into the BIOS? (just making sure something isn't fried
)
You should be able to get that memory up to 220FSB by changing your timings to 2-3-2-9 and quite possibly not have to change the Cas latency at all...also more than likely it'll require you upping the DIMM Voltage by .1 to have 2.7 instead of default 2.6v
After you've made changes such as these you should use memtest86+ to diagnose the memory for errors.
Bump it to 205..save settings without changing your timings or DIMM Voltage and run memtest86+. If you get an error (generally I find when OC'ing the ram it fails test 5 which is moving ones and zeros)....anyway if you get an error, then raise the Cycle Time (Tras) up by one giving you 2-3-2-7 if it errors on the first test or in that area, then you should loosen up the Cas latency to 2.5
Then go up to 210 and the Same thing applies. Test for errors and see if the previous settings can handle it. If not, raise the Cycle Time (Tras) by one and see if that corrects the problem. If it doesn't then up the Dimm Voltage. You can hit 2.8 Dimm voltage without any problems with that corsair RAM assuming you have heatspreaders on it, but with those timings I'm assuming it's XMS and it came with heatspreaders.
let me know if this helps
