So, before I go buy, are either of the 6400 X2 unlocked?  The regular or the BE?  Thanks.

Unlocked multiplier?  That's what a Black Edition (BE) is.

well, thats what i thought, but i heard some people talking about the 6400 BE not being unlocked.  so, then i was wondering if there was a real difference in the OC ability of the two.  has anyone tried to OC the regular?

The highest you can get out of both of them is 3.3GHz. 3.4GHz is extremely rare, and I haven't seen anyone with those speeds.

i found this forum where they got it up to 3.4/3.5, but really only stable at 3.4.  that gives me hope.
 
http://forums.techpowerup.com/show [...] light=6400

Those are remarkable speeds for the 6400+. Good luck on achieving that.

I have run mine stable at 3.45ghz and have reached 3.6ghz at 1.5volts
 
memory lowered to 667
multiplyer at 15x
ht at 230
1.4volts
 
ASUS M2N-SLI Deluxe
AMD 64x2 6400+ black edition
OCZ Vandetta CPU Cooler
CoolerMaster Real Power Pro 850  
(2) evga nVidia 8800GTX 756mb pci express video cards in SLI
8gig (2x2048) dual channel Corsair XMS2 800mhz PC2-6400 DDR2
Creative Fatility XFI sound card
21” Gateway Widescreen High-Def LCD
Klipsch 600watt Surround Sound 5.1 system
ECCI 6000gt FLDS with PMBII Brake High Def USB
Windows Vista Home Premium 32bit and 64bit dual boot
Cooler Master Stacker 832 Tower

I have mine running stable at 3.44ghz also @1.39V
Multiplyer is at 16x
Memory is at 860mhz (4-4-4-12-2T)
 
 

Blewby-
 
Care to post some bench numbers? Like Everest Ultimate Memory Read, Write, Copy, and Latency would be awesome.  
 
I currently have the 5000+BE overclocked to 3.2ghz as my everyday, with my ram running at 5-5-5-15 2T 1066, and would love to compare numbers.
 
Thanks!