Computer for gaming

which is better phenom 2 x2 550 be or athlon 2 x4 620... please help me decide which one should i buy... asus M4A785TD-V EVO,4 G ddr3, 500 seagate,OCZ fatality 700 watts...

Both stock, go with the quad. Even if you could unlock the 550 into its own quad, one could assume you would have the know how to OC the 620, so all things being equal, the factory quad will do you good.

Don't bother with the athlons, you will just be kicking yourself if your friend gets a phenom.

there are no games as of now that'll utilize all four cores... a dual core is sufficient...

As theneomaster said, soon games will start using quad core cpus. Also if something pops on a computer (like say anti virus) you cpu will tell the second program to run on the next available core/tread so your games (in theory) wont slow down.

I personally think that the multicore athlons are a good choice, it just depends on what you want to use it for. In my opinion, if you are spending a large amount of cash on a gaming machine, don't bother with dual cores/athlons. Like I said before, in a couple of years, you will look back and wish you had saved a little more and gone for the bells and whistles, the quadcore/phenom. This is precisely the reason for my purchase of the PII X4 940.