I ordered an Athlon 64 3200+ from Zipzoomfly and it came today. However, it looks like I got the wrong one. I ordered the one with the BP stepping and the one I got has BW. So, basically I got an E6 instead of an E4. Would it be worth sending it back or should I just keep it? I was really wanting to overclock this a lot and I've heard the E6 doesn't overclock well at all.