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why not have you sig as....
i3 540@ 4.20GHz : Motherboard: Gigabyte GA-H55M-UD2H
Corsair XMS3 4GB (2x2GB) DDR3 : 9800GT
The other issue is OCUK staff reported problems overclocking a quad-core on that little UD2 mobo as it has no heatsink on the power devices and basically fried. Your i3 setup will be fine for a good while yet until a full mobo/CPU swap to future kit - Sandy Bridge/Ivy Bridge/Bulldozer.