The memory controllers in the Nahalem Xeons in the Mac Pro are potentially damaged by high voltages (above about 1.65V I think). I presume that the Mac Pro wouldn't apply the higher voltage but I wouldn't risk it. Stick with 1.5V.
The memory controllers in the Nahalem Xeons in the Mac Pro are potentially damaged by high voltages (above about 1.65V I think). I presume that the Mac Pro wouldn't apply the higher voltage but I wouldn't risk it. Stick with 1.5V.
The Voltage Regs would give 1.5V, and the memory can take 1.65V without damage. Using the 1.9V variety wouldn't burn up anything, it just wouldn't work, as it's not getting enough power.
If it were getting 1.9V though, it's output would damage the Integrated Memory Controller on the CPU. Either way, you wouldn't want to use it.