GIGABYTE EX58 3UDR - Mem Voltage 1.5? 1.65?

mcrustk2

mcrustk2

mcrustk2

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Hi.

This is a bit of a noob question but im about to place an order (even though not in stock) so I better get it right.

The MOBO in forum title says the mem should be 1.5v I checked Gbyte site and manuals and they all say 1.5v.

Is there any leway in this?

I want to get some Corsair 6GB tri Chanel XMS3 1600Mhz which is rated at 1.6-1.65v.

Does this mean that it wouldnt work/might not work?

I have noticed the slower 1333Mhz Corsair of same model is 1.5v.

Can someone point the obvious out to me?

:D
 
Is there anywhere I can confirm this? as the manuals & website dont. Im not saying I dont believe you as I think you are right, I just want to confirm it before I place an order.
 
1.5V is the limit for the DDR3 1333 Ram Intel say you should be using but unofficially DDR3 1600 or higher is supported. I7 can be destroyed with high DDR3 voltages so you are right to be cautious but 1.65V is fine. Anyway the difference performance wise is tiny so you may as well just buy 1333 as unlike DDR2 it makes little realworld difference.
 
mcrustk2 said:
Is there anywhere I can confirm this? as the manuals & website dont. Im not saying I dont believe you as I think you are right, I just want to confirm it before I place an order.
Click to expand...
AWPC said:
1.5V is the limit for the DDR3 1333 Ram Intel say you should be using
Click to expand...

asusp6tta6.jpg


This is a simplication. To be more accurate the voltage delta between the uncore VTT to vdimm should remain below 0.5v. The nominal QPI VTT of 1.1-1.2v gives the maximum 1.65v referred to above. The RAM you see for sale with 1.5v is designed to comply with the JEDEC standard, don't worry about it.

http://www.intel.com/support/processors/sb/CS-029913.htm
Intel said:
What are the Intel® Core™ i7 desktop processors DDR3 memory voltage limitations?

Intel recommends using memory that adheres to the Jedec memory specification for DDR3 memory which is 1.5 volts. The Intel® Core™ i7 processors should not be used with DDR3 memory that is rated for voltage over 1.65 volts. Anything over this voltage can either damage the processor or significantly reduce the processor life span.
Click to expand...

If you plan on overclocking, many of the voltages will end up close to or beyond Intel's maximum stated values, let alone nominal. That doesn't mean it will kill or significantly degrade the cpu within the life span of a few years.

At your own risk of course, but 1.65v vdimm is not the dead stop limit that some say it is, it can go higher without instant death. It just helps if you understand what causes the damage. VTT is the limiter and that has a stated maximum value of 1.35v

Useful article on Nehalem Architecture.
Comments from Intels François Piednoel (aka Drwho?)
Core i7 PDF > 2.10 Absolute Maximum and Minimum Ratings
 
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