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While the ASRock board would not like to boot our i3-530 with 200MHz virtual FSB, the MSI did not cause such troubles. The VCore run at 1.225V.
Of course this time we did not stop with 4.2GHz and the MSI board was stable with 4.4GHz @ 1.35V, which is quite impressive.
Because the CPUs run very efficient at a VCore of about 1.100V we see no reason to attempt lowering the VCore itself. You could only shave off some millivolts, so we think it's not worth the effort.