Hey. So i've got this budget rig and im thinking of upgrading it. The specs are GT220, Pentium Dual Core E6500, 650GB HDD, 4 GB of DDR2 ram and a ****ty 300W PSU. Now im thinking of buying a new 500W PSU and a GT550 Ti but my processor is such a piece of crap i don't know if it's worth it? any suggestions?