Difference 1.35v 1.5v 1.65v

jimbo19 · 18 Sep 2011 at 07:45

Can someone give a simple explanation of the differences between the various ram voltages ?
I guess 1.35v and 1,5v are sandy bridge and 1.65v is for other chipsets is this correct ?

Leeroy123 · 18 Sep 2011 at 09:21

1.65 can be used on sandy too mate. 1.35 isnt sandybridge. Pretty sure it is recommended between 1.5 - 1.6 but 1.65 can be used.

jimbo19 · 18 Sep 2011 at 09:22

Cheers for that - bought some Black dragon and its 1.65 so thought wouldnt be able to use it on sandy

mmj_uk · 18 Sep 2011 at 09:36

i3/i5/i7's have a memory controller whose voltage is linked to the actual RAM, so whatever you set for the RAM voltage is also sent to the on-die memory controller, stock voltage is 1.5V for the memory controller and 1.35V is technically undervolting it and may cause stability problems.

Stonedofmoo · 18 Sep 2011 at 15:49

Clearly it doesn't though as they sell 1.35v RAM for it now, in fact there's a number of users on this very forum running 1.35v RAM without issues.

bhavv · 18 Sep 2011 at 16:47

mmj_uk said:
i3/i5/i7's have a memory controller whose voltage is linked to the actual RAM, so whatever you set for the RAM voltage is also sent to the on-die memory controller, stock voltage is 1.5V for the memory controller and 1.35V is technically undervolting it and may cause stability problems.

Undervolting doesnt cause stability problems:

- My 2 Gb Geil Modules do 1600 Cas 7 @ 1.45v

- My Corsair Vengeance 4 Gb modules did 1600 Cas 9 @ 1.3v

- My new G Skill ripjaw sticks do 1600 Mhz Cas 9 @ 1.25v.

Current ram is using very low voltages, but they also dont repond to or do any better with more volts unfortunately.