Corsair 16800 ram 1.5v or 1.65v 2500k

Hello guys,

I ordered 4gb of ram corsair XMS3 CMX4GX3M2A1600C9, however i realised that its not 1.5v but 1.65v. I another another set that is 1.5v. I am confused is it worth returning it to get the correct 1.5v ram. I am building a sandybridge setup using a 2500k cpu.

I have asus p8p676 pro, it says in the manual that CMX4GX3M2A1600C9 is compatible at 1.6v. will i see any difference with the lower voltage ram? I plan to OC the cpu not the ram.