to go to an i5 thats compareable then just simply for the mobo & CPU you are going to need to add another 150ish to the budget.. & If your gaming the i5 (clarksdale) GPU isn't going to be enough. Dont get me wrong for integrated graphics the clarksdale is the best (but not by much over the integrated AMD's of late), but they just dont compete with a stand alone card. Also for power consumption at idle it may have an edge, but its not enough of one to makeup for additional cost upfront (it would take probably 5+ years to makeup the difference in idle power savings on your power bill) & Then you still couldn't game the rest of the time.
edit: as a quick priceout I got about 490 shipped for an i5 setup with no video card.. Thus it would be everything your brother wanted, except that it WOULD NOT be a decent gaming machine. That would then still require a decent video card for @ another 200 bucks (putting it about 100 bucks over the quad core system I priced out above) & still be a dual core instead of a quad core.
edit: as a quick priceout I got about 490 shipped for an i5 setup with no video card.. Thus it would be everything your brother wanted, except that it WOULD NOT be a decent gaming machine. That would then still require a decent video card for @ another 200 bucks (putting it about 100 bucks over the quad core system I priced out above) & still be a dual core instead of a quad core.
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