That's difficult to say... Most of the Opterons you see hitting 3GHz are 146's or 148's, which while not expensive, aren't the cheapest of the bunch. It's also heavily dependant on which stepping you get, and unless you want to try your luck at retail, you'll pay a steep premium for the good ones on ebay. Most of the current chips coming out of retail chains aren't doing 3GHz any more it seems, topping out around 2.8 or 2.9. My chip so far isn't capable of 3GHz, craps out around 2.9GHz ant 1.55 volts (the maximum allowed by my motherboard), but me and muffin (who has the same stepping as me on a 146) are picking at the thing together, and having realized we're both running heavily overclocked and powerful machines on 480 watt power supplies, are beginning to wonder if maybe that's the issue.