How do they compare to overclocked i7s though.
Well, if you are referring to performance, the internet says for multi-threaded apps they are on par (with some apps) otherwise a little slower. There's really no enhancements, just two more cores. Loading up apps, using internet, copying files, playing videos, etc., it feels as snappy as my I7 system, maybe quicker.
My main interest was to see how well it overclocked. Sounds like a 1 ghz overclock on an AMD is pretty good. So far I'm trying for 4.3 ghz, but it appears that 4.2 might be the limit. I continue to feed it Vcore but it doesn't appear to help (and I don't want to go over 1.6v). In contrast, the I7 920 and 980X would just suck it up and keep going. The only thing holding them back was the temps, even though I never got them to throttle down.
As for power usage (at 4.2) it was using just about as much as my I7s. On my watt meter, it shows about 500 watts on load. My water temp is just about the same too. Weird is, on Coretemp, it shows 47c for X6 and 83c for 920.
EDIT: My mistake, acutally AMD X6 about a 60 watts less. AMD 400 Intel 460.