My son's Rampage III Extreme PC has stopped working. Have narrowed it down to either MB or CPU. I don't have a spare CPU to suit that platform so I'll need to buy one. Don't want to spend too much $$$ just for testing. The xeon CPUs can be had quite a bit cheaper than the i7 9xx series. Are these fully compatible with this MB? Any disadvantages to using one of these for troubleshooting, or even long term if it does work? Also - out of curiosity, can anyone tell me what the alpha prefix on that range of xeons means? "e", "l", "w" and "x"? Lastly - if anyone in Launceston reads this, and has a suitable CPU we could borrow for testing, that would be awesome! TIA.