Well I've seen D9 sticks fail at 2.05v and some sticks that have worked fine for over a year at 2.3v... So it's difficult to say but after experiencing some early death for my D9GKX sticks twice on this Gigabyte P35 board I think it depends a lot on the motherboard too.
Currently running my backup CellShock DDR2-1000 CL5 D9GMH sticks at 2.29v until the others arrive from RMA to be able to run them at same settings my CellShock DDR2-1000 CL4 D9GKX was at 2.10~2.15v. I'm that person that can't satisfy myself with lower speeds than what I used to have and rather push the hardware a bit more instead. Have 2x80mm fans as cooling tho.
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