Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
does it matter? if so why?
My retail is a 3838A, a right stinker of a batch by most accounts. Never bothered clocking it.
Not quite on-topic but what kind of speed can you get out of these with decent air cooling that's stable for a 24/7 machine?