What Should I Upgrade?

so i have this 500 watt PSU http://www.newegg.com/Product/Product.aspx?Item=N82E16817171031

athlon II x2 @4.0GHz and a 4890. i have to use a molex to 6pin to make my card work. i want to upgrade to a quad but im scared the the quad and the 4890 will suck up too much power. i could upgrade my Gpu and that would take less power, but then i wont have enough money for a new cpu. what should i upgrade in this situation? i have a max of $150 budget

Hoenstly, under that much of a budget I dont' think it can be done. Upgrading either the cpu or the GPU would just create a bottleneck in the other. I suppose just try hord your lose change for now and save your cash for another three months and wait for stuff to drop in price. Sorry I can't be of more help.

yeahman, your rig is balance.... that is to say, balanced crap..... your psu should be ok, but everything else is weaksauce

http://www.newegg.com/Product/Product.aspx?Item=N82E16819113286 

then upgrade you gpu when you can