Mid-2010 - MacPro5,1 (8-core)
Compatible upgrades for: MC561LL/A Mid 2010 Mac Pro.
Standard RAM: 6 GB
Maximum RAM: 128 GB*
Details: By default, 6 GB of RAM is installed as six 1 GB modules. Two slots free.
*Apple officially supports 32 GB of RAM in this model, but it actually could support 64 GB of RAM. Later, third parties bumped this unofficial maximum RAM to 96 GB running Mac OS X 10.6 or 10.7, and yet again to 128 GB, but only when running a 64-bit version of Windows XP or later or Linux. Mac OS X only can support 96 GB of RAM.
RAM Slots: 8*