what does it mean symmetric? please explanation

dual channel....

i dunno about that..but i think u should running dual orthos only..not until 4...based on ur proc were quad core..

1 orthos = dual core
2 orthos = quad core

my Q6600 became quad core extreme lol O_o

If I'm not mistaken, symmetric here means that the both channels of the dual channel memory controller operate together, transferring 128bits at one shot each time. Asymmetric should be 2 single channels operating together, each transfering 64bits for a total of 128bits. By this convention, an asymmetric setup allows for 2 seperate memory requests to be made at the same time while for symmetric memory requests must be queued, but can handle large blocks at one time.

I'm guessing this based on the explaination given for the new AMD quad cores, which call this modes "ganged" and "unganged". Having memory controllers operate seperately means more cores can have their memory requests fulfilled while having all four share a single, high bandwidth controller means they have to queue up and wait.