Ihave a Mac Pro 5.1, 12-core 3.46 Westmere. I just bought 128gb of 1333 ddr3 ram for it, but it shows as being 800mhz only. I contacted the seller of the ram. Read what he said below. Is this correct and is there a way I can bring it up to 1333mhz? I took out half and it still says 800. I took...