Everywhere says "max 8GB" of RAM in the 2010 MBP, but is this a hardware limitation or software limitation? I've got a mid-2010 2.8GHz 15" MBP. OWC and all other references say 8GB max (which is what I have). Is that a limitation of the motherboard, or something else? I routinely max out 8GB, so I'd definitely like to go with more if possible.