Resolved Mac Pro dual 2.66 Quick question

[eljanitor]

I upgraded my Mac Pro recently, and here's something kinda crappy that I noticed. I have one HD running 10.5.8 and another one running 10.6.6. So I bought the special Fully buffered PC2-5300 DDR2 ECC RAM for this model because as we all know Some RAM wont work in certain macs because of physical design (even though its the same type!!)

When running 10.5.8 It says it recognizes my 2GB in each slot, but when running 10.6.6 it says sorry you only have 1 GB per slot.

 

[derbothaus]

Also buying non fully qualified DIMM's can cause strange behavior. Get memory from a trusted dealer. Unless you did that already and then I would say you should take it back. I know of no situation where this would happen with healthy compatible chips for your hardware.

 

[eljanitor]

Probably Bad RAM

After swapping the bad RAM around and getting strange problems it finally gave me an ECC Error on one chip. It passes extensive RAM testing using Tech Tool Pro. So yes its probably just bad RAM, because so far its been an intermittent problem, guess I'll send it back.