A while back I ordered a cheap (but not that cheap) used i5-2400 that turned out to be mislabeled. It was actually an i3 of the same generation so it was still new enough to support hardware acceleration, which DOES help no matter what other people say. When I complained to the seller, he offered a small partial refund and a free memory upgrade. Even this would have been enough to handle 3 4MP cameras, and it was enough to handle what I needed it for, so I accepted the offer rather than return the system and it has been running fine since then.