Slot 3 and 4 share use the same channel.Sorry, little advice. If I'm not wrong go with 3 modules for each tower, that way it will use 3 channels instead of two, resulting in faster data traffic . Maybe someone could confirm that.
Therefore, install 4 DIMM (assume single processor) will always use all three channels. There is no other choice for the computer.
"Use all DIMM slot will make the cMP fall back to dual channel mode" is impossible.
ECC is not a requirement.You should know that MacPros only accept ECC Modules.
And yes, three is the magic number. Unless you really need that much RAM for your application and don't care about the somewhat lower performance...
Anyway, this problem doesn't looks list HWAccel related.Hi guys,
Couldn't find any topic about that, so I really hope to find some help.
I could notice after upgrading my cMP 5,1 to Bir Sur (OC 0.7.9) my memory modules are getting into conflict. I have three 8gb modules in each tower (OWC modules) properly installed but no matter what combination you try, I'm always getting a red led lit on the second tower.
Does Big Sir have anything to do with that? Really weird, never had an issue with memories in 10 years.
Memory issue (that red light) usually happen right after power up, before the OS start to load. Therefore, should be OS version independent, and not related to HWAccel.
If you can't find a existing thread that fit this question. May be you can open a new thread for it.