Can you put unbuffered RAM in a registered server?

[Lyuokdea]

Hi All,

As the question above indicates. I notticed that the unbuffered ECC RAM is much cheaper than that registered version, but are they compatible?

Thanks,

~Lyuokdea

 

[Rifter]

What mobo?

 

[Lyuokdea]

Supermicro X8DAi-O for the dual Xeon 5500 "Nehalem" processors

~Lyuokdea

 

[RebateMonger]

Originally posted by: Lyuokdea
As the question above indicates. I notticed that the unbuffered ECC RAM is much cheaper than that registered version, but are they compatible?

I know zilch about Nehalem or DDR3, but I've never heard of a motherboard that would run non-buffered RAM when Registered RAM was required.

However, SuperMicro's memory QVL lists Registered, ECC, and ECC-Registered memory. One of the qualified modules, Crucial's CT12872BA1339, is Unbuffered ECC DDR3.

On the other hand, Crucial.com's recommendations
includes eighteen modules and every one of those is Registered.

The manual says, "The X8DA3/X8DAi supports up to 96 GB Registered ECC DDR3 1333 MHz/1066 MHz/800 MHz in 12 DIMMs. Memory speed support is dependent on the type of
CPU used on the board."

If I was going to try unbuffered memory, I'd ask SuperMicro first.

 

[Lyuokdea]

good to know.... I see /24 GB Unregistered listed on the motherboard, but then everything that the motherboard was tested with looks to be registered, so maybe i'll just go that route.

~Lyuokdea

 

[Blain]

Use registered/buffered

 

[Viper GTS]

Nehalem supports both. This should clear up some of the confusion:

http://en.community.dell.com/b...ry-configurations.aspx

Viper GTS

 

[Lyuokdea]

Well, supermicro seems to believe that the RAM is indeed good. This leaves the power supply and motherboard as the two possible power components. But I don't have an extra of either, so it's hard to determine which is at fault.

I'm going to try to pull out one of the processors, and run the motherboard with only one processor (I believe this will work ok?) But I can't figure out anything else to do for the life of me.

Anything else I should check? Should I try RMAing both components? Should I only RMA one?

Thanks,

~Lyuokdea

 

[Lyuokdea]

If you pull one processor out of the dual processor array, do you still put in both 8 pin 12V lines to the motherboard? Even though one processor isn't there to receive the power?

~Lyuokdea