If your mobo supports, get atleast 333Mhz DDR RAM, however, the costs are high as DDR2 is what people are using. PATA HDD is also hard to get, try to get second hand one, but then, reliability will be an issue.
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AMD Phenom II X4 840, 4 GB RAM, MSI HD5670, Corsair CX400 PSU :)
Nokia 5230 :(
Canon IXUS 115 HS :)