I am finally upgrading my ram in my 12-core from 12 gigs to 48gigs. From what i have been able to conclude, OWC is the cheapest around.. Is that true? I apologize if i am repeating an existing topic, but i cant seem to find anything.
I don't know if they're the cheapest, but their RAM works, and they have awesome customer service (beyond that of Apple IMHO). Every single machine I have ever needed RAM for, I've bought through OWC (and this is going back to the PowerPC 601 days).
Also I read that sometimes their ram has issues and shows errors in logs and essentially stops working.. How true is this? Should I be hesitant of buying ram from them?
I don't know what that is. 99% of the time their RAM is identical to the stuff Apple sells, because either company (OWC or Apple) tends to buy whatever is available on the market in sufficient quantities. Might be Micron RAM, Hynix, Samsung, etc.
The important thing is that OWC guarantees their RAM *will work* in your Macintosh. OWC is first and foremost a Mac company. They wouldn't have the excellent reputation they have today if they sold defective stuff.
I have been getting mixed opinions whether or not ECC registered RAM is really worth it. I hear that the errors that could occur i wont even notice, but i also if they do, they will give off a kernel error..? Im very confused what I would truly notice if an error ever were to occur. i am strongly aiming towards the Corsair 8GB XMS3 sticks, but at that price point, i don't think that they are ECC registered..
Apple has never shipped a Mac Pro without ECC RAM. This should tell you how important it is. Likewise, OWC doesn't actually sell non-ECC RAM, because running that crap in your Mac Pro is not recommended. You can do it if you want to be cheap and you want to run your Mac Pro out of spec, but it is not recommended anywhere (other then by people trying to save money) for this calibre of a machine.
ECC means that your Mac Pro can tell if something is wrong or broken in your RAM.
You said you want to run 48GB of RAM, so I'll run with that as an example. 48GB of RAM is approximately 48 * 1024 * 1024 * 1024 * 8 bits, equal to 412316860416 bits. No, I'm not pulling your leg. There are 412316860416 bits inside 48GB of RAM. Each one is either a 1 or a 0 at any given time.
Let's say ONE... Just one of those bits decides to go wonky for a split second and accidentally flips from a 1 to a 0.
With ECC RAM, your Mac Pro will detect this issue and correct it. You will likely see an error show up in Console.app, and the relevant memory stick will show up in System Profiler.app's memory section with the number of errors that have occurred.
Your system will however continue to work.
If you don't have ECC RAM, then there is no way for the Mac Pro to tell if something has gone wrong or not. This can lead to all sorts of unbelievably random behaviour that can sometimes be a huge pain in the butt to track down. Everything from data corruption to kernel panics can occur (and a kernel panic requires a hard restart to clear).
Without ECC RAM, you will NOT know if the RAM is failing or if something else is broken inside your machine. Your machine WILL begin to behave strangely, and this could have the consequences of even corrupting data on your hard drive (since if bits are being flipped in RAM and written to disk, there's no way to tell if the data is supposed to be like that or not).
Seriously, the simplest answer to all of this is to just buy your RAM from OWC. It's a good price for a solid product. The stuff is guaranteed to work and OWC has excellent customer service if something goes wrong (I have never personally had an issue with their RAM in the ~15 years I've been buying it from them). Install the stuff in your Mac Pro and get on with life.
If you buy something else and cheap out, it's going to bite you in the ass later on. You might spend hours or days trying to track down the issue, and then you're going to have to pull the incompatible RAM and ship it back- and god knows how the company you bought it from is going to handle the return, if they even let you exchange it.
-SC