So, while I wait for the taxman to send my return and bestow upon me a QX9650, I picked up an E4500 to tide me over and I must say, I'm impressed by the performance of this chip for the price! Cost me $137 plus tax at Infonec and it's doing quite well at 8x400 so far with my new G.Skill RAM at 1066 (that's 8GB!!)
CPU-Z Validator 2.1
I ran Prime95 last night at 3150 and it was fine for 8 hours.
I'm going to try it now with 8x400 and see how it does. Temps are in the mid-60s so still ok, although it idles high at around 40...
Anyway, not worrying temps. I'm quite pleasantly surprised by this chip so far.