synphul :
It should be able to handle those things. As far as games, it depends on the game. I was still using an e8400 when cod ghosts came out and was playing between 50-60fps on high settings. It also handled crysis, farcry and others at 50fps and above. Mine was overclocked to 3.6ghz and using 8gb of ddr2 with an hd 7850 gpu though it was bottlenecking the graphics card slightly.
A 4th gen i3 will likely be better especially with the hyper threading and will allow you to play games that call for 4 cores since it at least has 4 threads despite being a dual core cpu where the e8400 didn't have ht. Being much newer the ipc performance is much better also.
Wow great, since I have no knowledge of overclocking I will not do that in any case.
I'm quoting tower prices next to models as desktop is $10-12 cheaper.
If I go for ddr2 models of Hp or dell I can use my ram ( but in few years till it last the ram will be worth nothing). Models Hp dc7900 $41 , dell 760 $39 dell 960 $39.
But if I go with ddr3 models of Hp or dell or Lenovo ( ya we have those here as well) the ram might sell for something even though it will be only ( 8500 or 10600) . Models Hp elite 8000 $59, Hp 6000 $55, dell 780 $52-55, dell 380 $50. Lenovo q45 $47
The board are same for either ddr2 and ddr3 models . Intel q45, the different are the spec and their psu in tower n desktop. Strangely Hp dc7900 have strong psu 375w in tower while for rest tower is near 305-320w.
So would u recommend these system or should I try to find a unbranded one. Price might be in same range.
lastly, will c2d will be better than g840 processor?
As this is what I also got offer for.
G840, Asus p8h61mxl2, 2gb ram (10600 one from those branded machine), casing with antec green 380w . All used for $55
Same spec but board different Intel dq67sw for $70.