thanks I go check
I bought some ram, ecc, fb-dimm, pc2-5300f, 667mhz, but it is not recognised? are you sure it doesn't have to be verified by mac pro to work?You can get 16GB off eBay for $120
Th secret is, the memory doesn't have to be for Mac Pro. It just has to be DDR2, Fully Buffered, and PC2-5300F. It can be either 667Mhz or 800Mhz.
Item number: 150871048749
16GB (8x2GB) = $100 shipped.
I've been buying/selling Mac Pros since January 2012. Sold about 60+ Mac Pros since than. I've tested my theory; the ram works fine.
This is also true for DDR3 in 2009-2012 models. Kingston, for example, has so many product numbers, as long as it also has thermal sensor, that are compatible and cost less. Amazon warehouse sometimes sells used RAM modules at almost half the price of the new ones, and offers 30-day return period if not satisfied.Th secret is, the memory doesn't have to be for Mac Pro. It just has to be DDR2, Fully Buffered, and PC2-5300F. It can be either 667Mhz or 800Mhz.