Okay system on overnight no crashes no funny mouse so this is looking really good, final test system overclocked -> that also is looking very good.
agrafuese my temperature monitor is hardware I have a thermometer wired to the underside of my thermalright xp120 heatsink, and believe me when I say this is running hotter than it has ever reached even running benchmarking software, so I would be careful anyone who doesn't have a temperature monitor.
I would say also definately no decrease in performance, possibly a slight increase.
So the only downside is temperature which I can live with I live in a cold house lol.