i still say go with the san diego core cause the core is newer, stays cooler, and doesnt use as much power. well you might want to go with the other ram, cause you never know when you might want to try OCing, maybe if you read throught some of the stickies and then try it, you might be able to get some nice OCs out of it.
EDIT:
San Diego
Once the silicon problem found within the Winchester was fixed, the 90nm process could support higher clock speeds. AMDs high end cores such as the 4000+ and FX series were stuck on the 130nm Clawhammer core since the 90nm silicon could not support them, however, using the Venice architechture, the San Diego, with a larger 1MB L2 cache, was born.
The San Diego is identical to the Venice, same instruction sets and memory controller, as well as same notorious overclockability. The introduction of the San Diego effectively migrated all Athlon 64 cores to 90nm process technologies. If you are buying a high end core, the San Diego is for you.
Clawhammer
This core is another one that migrated from the socket 754 family, and assumed the role of dealing with the high end processors in the family, such as 4000+ and FX series processors. It is also avalible in 3400+ format however. It's nearly identical to the Newcastle except it pumps out more heat, consumes more power, and has a larger 1MB L2 cache.
Like the Newcastle, this core has bitten the dust recently, and is outshown in both overclockability and overall performance by newer 90nm cores.
in my personal opinion the only two cores worth considering right now are the Venice, and the San Diego. The previous cores are outdated , and price is relatively the same when comparing to their predicessors.
http://techist.com/showthread.php?threadid=59883
written by gaara