Is there a way to check for faulty RAM in a Mac Pro?

There is the Apple Hardware Test but my experience has been it is rather simple and misses a great deal of things that are not major and obvious.

Look at the apple menu (apple left side of the menu bar) About This Mac, More Info, System Report, Hardware, Memory and see if all memory modules show up, do any appear to be incorrectly reported, not reporting at all. Gives you a gross evaluation.

Just noticed your name...are you really another Landry???

The Mac Pro 65lb tower uses Error Correcting Code RAM. A Hardware assist checks every read from memory and corrects single-bit errors on the fly. These corrections are eventually noted in

About this Mac > ( More Info ) > Memory:

Hey, don't you guys go airing your dirty Landry in public... this is a family show.😁

There's yet another RAM tester, called MemTest.

Try it as well.

http://osxdaily.com/2011/05/03/memtest-mac-ram-test/

-- kaz-k

Do this, excellent FBDIMMs $64 8GB kit - I have 16GB in mine now.

They are built above spec, run cooler (no need to boost the system fans now) and very affordable.

2x2GB FBDIMM DDR2 667MHz @ $32

http://www.amazon.com/BUFFERED-PC2-5300-FB-DIMM-APPLE-Memory/dp/B002ORUUAC/

Swapping parts like DIMMs is one good excellent way, just as swapping graphic cards.

But sometimes you also have to, if there were problems of any type, have a new clean system too.

Just like zeroing a drive does not insure there are no weak sectors, any test for RAM, for ECC esp, is more of a "at least it was not so bad that AHT or memtest threw up its hands".

If a DIMM reports half its normal capacity/size it is fried.

FBDIMMs stress age from hot-cold-hot changes and never lasted or never should be trusted after 3 yrs probably. The above - compared to what we paid back in even '07 was... criminal ($400 for 2x1GB)