2009 MP non-ecc ram

[s.m.t.]

Sorry if this has been asked, but I didn't see a response for the 2009's, maybe it is the same answer as the 2008?

Can I put non-ecc ram in the 2009 MP?

I just bought a recertified unit from apple, but it only comes with 3GB of ram, I want to get closer to 6GB.

So I am trying to figure out what is the cheapest route. I am currently looking at a tripple channel kit on new egg by crucial that is non ecc for $165.

or would it be better to add a single 2GB module which is much less and upgrade to a tripple 6GB ECC kit later?

[Umbongo]

You can use non-ECC memory if you want to save the $35.

[s.m.t.]

Ok that is go to know. Actualy if i need to stay in sets of three i would have to spend more, unless i can just add a 2GB stick off ecc ram to the exsisting 3 1s.

Which leads me to the next question. Do i put in 3x2GB or 4x2GB or 2x4GB?
do they need to stay in pairs or sets of three?

[Concorde Rules]

3x2Gb has the fastest memory bandwidth
4x2Gb may have performance benefits if you fill it all up.

I went for 3x2Gb.

[s.m.t.]

Ok thanks!

I look and see if the cost of the extra 2GB is worth it. Sounds like 3x2 route is the best.

[Umbongo]

May as well add the single 2GB ECC DIMM and see how you use it under activity monitor, then you can make a decision when to get more memory.