I challenge anyone with a PC that has a QUAD CORE PROCESSOR to mine with their CPU for an hour then multiply their hourly average hash rate x 51 and see if it is somewhat close to one S3. Well, you might have to multiply it by 58 cause Slush always shows a little slower than what my rigs say.
You might see you have to multiply times close to 200 to get close to 450GH/s. If that's the case, then it takes approximately 200 to equal 1 S3.
You really ought to test out that hypothesis yourself before spouting off such utter tripe on here. You do know of course a Ghz is in no way comparable to GH/s.
Actually, since I'm feeling kind I'll give you the answer and save you some time and give you the (rough) hashing results using all cores.
4x Opteron 6174's will crank out around 115Mhash/s (while chewing over 300 watts), an Athlon 64 X2 6400+ Black Edition will do a whopping 2.9Mhash/s!! But you're also aware that's the exact reason people switched to GPU's right? where the 5830 would do 270-330 Mhash/s 5850 was around the 400 range.