Upgrading RAM in PER710

Hello

I have a PER710 Dual processor with 48 GB RAM (12 x 4GB) and I want to do an Upgrade to 96 GB

Memory slots currently are in: A1 to A6 and B1 to B6 physically. Optimizer memory mode.

my idea is adding 6 x 8GB RAM Modules, is this doable? or what modules size/quantity should I get?

thanks

Marcelo