Anybody know default voltages for every memory?

[Matthew Kane]

Hi to all....just wanna know what are the default voltages for the following:

SDRAM:
PC66-
PC100-
PC133-

DDR:
166-
200-
333-
400-

DDR2:
533-
667-
800-
1066-

DDR3:
1200-
1333-
1400-
1600-
2000-

Thnx to those who are gonna help me with this!

 

[Brain_ReCall]

Generally memory voltage runs by type.
For example:
SDRAM: 3.3V
DDR-SDRAM: 2.5V
DDR2-SDRAM: 1.8V
DDR3-SDRAM: 1.5V

Many different sticks, across multiple manufactures and even different models, need different voltages to run at their "specified" frequency/timing. They will/should run at the type's default, just at greatly reduced timings.

 

[Matthew Kane]

Thnx for that!!!

So memory types always run at the same voltage, and the speeds doesn't affect the voltage of being higher while in the same memory class?!

 

[jester1176]

The default/standard voltage for a memory class (ddr, ddr2, ddr3) is standardized by JEDEC (http://jedec.org/) for compatibility.

for example, jedec standard settings for DDR2 800 are 800MHz, 5-5-5-18 1.8v

If you have a DDR2 800 module that's requiring higher voltage, then it's non-standard and might not be compatible with a ddr2 motherboard. for example, if a module requires 2.1v, it probably won't be compatible with an intel ddr2 board as the vast majority of ddr2 intel boards don't give you voltage options for more than 1.8v.

 

[Matthew Kane]

Thanks jester....that explains more to me now which is what I was about to ask about back! Cheers