Ok so i am trying to revive my old pc. It has a ga-945gcm s2l mobo with 2gb ddr2 ram (max 4gb according to mobo) , an Intel Duo Pentium E2180 and a 160 gb storage(hdd). I have upgraded the psu to a cheap 450 watt which will be fine and better than the previous 250 watt one. Also i have put my old r7 240 2gb gpu. I am thinking of upgrading to 4 gb ram and changing the cpu. what are your thoughts?