So the OK status in the profiler lies if its bad sticks?
Also would you get kernel panics if a dimm was faulty but had no data in a stick, or does it start to kernel panic once data has entered the dimm?
Two of the sticks showed "OK" in OSX, but when I did the Apple Hardware Test (Extended) it gave me memory error.
I took all RAM out, only left Apple RAM, and did the test again and got zero errors, so it was Crucials fault.
Ok this is bull*****.
New Crucial RAM is BAD again! The DIMM lights light on the board...two seem to be bad.
Bye bye Crucial. I'm going with OWC. I am going to get my money back for the shipping that Crucial charged me!

Alright, couldn't get 4 of them to work without issues (mixing and matching). I always get the 4MEM error when I have 4 of them...if I leave 2 of them for a total of 2GB, I ran a test and got zero errors.
Ok I'm sending these back to Crucial and they can shove it.
I'm now in need of RAM. Are the OWC "Netlist" versions good? The heatsinks don't look like the apple ones...?? What RAM modules do the OWC's use?
The Crucial heatsinks look EXACTLY the same as the Apple ones.
Thanks for trying to help me out.
I just ordered OWC Netlist 8GB kit.
They told me that they'll waive the restocking fee and extend the returns to 30 days on this one if it's bad.
Will be receiving it next week...
Wow I've never had such a headache with any computer in the last 15 years that I've been using them.
Maybe Mac Pro RAM is more finicky than MBP RAM, but I've ordered plentry from OWC and everything's been great.
I had 1x512mb stick, 2 1x1gb sticks, then 2x512 sticks for the gf, an AL-Mercury enclosure, and an AL-Mercury dual enclosure. Great company.
You must've been really lucky...what are the odds of having bad RAM from different batches? Very rare.
I think the OWC's that I'll be getting next week will have the same issue...I've become a pessimist
It can't be the risers because two Crucials worked ok and passed a test..