32gb ram not working

Anything other than Crucial, OWC or Apple supplied ram is unreliable in my opinion. G Skill, Kingston and Corsair are among the bargain basement brands that cause kernel panics, I wouldn't use them. Since you also had problems with the Apple supplied ram I do t understand why you haven't taken your machine in for service? There are plenty of folks successfully using 32gb of ram on a Kate 2013 but they're nit going to post because they're not having problems. Was the 32gb of Hynix ram shipped with the computer or installed by a reseller?

Do as you will. My "data" is based on post after post here from people who have had panics related to bargain basement ram. Of course they say that their ram is certified, what would you expect them to say? The fact is that these brands commonly label ram as one thing when in fact it's only close to that. PC's are much more forgiving with loosely spec'd ram but macs require that ram be the EXACT spec.

Again you fail to mention why you don't involve Apple with your in warranty Mac? Part of what you laud for us warranty.....you should use it. But like I said....do as you will.

Well I looked on Crucial's forum and there are plenty of people that can't get 32GB to work.

As far back as 2010, there was a problem with maxing out the RAM with third party RAM - unless it was OEM RAM, you could not max it out without problems. That is the reason why mine has 12 GB of OWC RAM (out of a max of 16). See a couple of the very lengthy threads here:

https://discussions.apple.com/thread/2588800

https://discussions.apple.com/thread/2567907

And, as Macs have been known to be extremely sensitive and finicky with just the exact type of RAM, I certainly would not use Kingston, nor any other brands really except OWC (macsales.com) or Crucial - personally I prefer OWC since they actually test the RAM themselves and guarantee it to work with a lifetime warranty.

Both GSKILL and Corsair state that their ram has been certified by Apple's labs, so I don't know what data you base your criticism on?

The data is in about 10 years of posts such as this one on these forums.

RemekTek wrote:

No, as I wanted the sticks to be symmetric, for dual channel operation.

Buy Ram that works.

OWC or Crucial will supply Ram that works in a 4 X8GB configuration in your iMac.

Kingston, Corsair (especially Value Ram) etc won't.

RemekTek wrote:

Well I looked on Crucial's forum and there are plenty of people that can't get 32GB to work.

Both GSKILL and Corsair state that their ram has been certified by Apple's labs, so I don't know what data you base your criticism on?

It is not relevant that Corsair think that their Ram is 'Certified by Apple' (I assume that other than the marketing puff they offer no proof of this 'certification')

I know of no 'Apple Certification' program.

>>If you can figure out the part number on the Micron memory show in the post dated 10 April here then you'll have found at least one person who says it works.

It looks to be

MT16KTF1G64HZ-1G6E2

babowa wrote:

Well I looked on Crucial's forum and there are plenty of people that can't get 32GB to work.

And, as Macs have been known to be extremely sensitive and finicky with just the exact type of RAM, I certainly would not use Kingston, nor any other brands really except OWC (macsales.com) or Crucial - personally I prefer OWC since they actually test the RAM themselves and guarantee it to work with a lifetime warranty.

Same here, I recommend OWC but if you have no way of buying from OWC then Crucial is the second and inferior choice. I recommend NO other brands.

Like I said in the very begining Crucial or Other world computing ram are the only 2 that seem to work consistantly others are considered to be Bargin Basement and will cause problems. I suggest you go to either of the sites that I furnished and you will find your answer there on either site. Many of the answers you get may be misleading so this is why you must get your information from the manufactures of the ram and not from area's that are for the most part quessing at the correct answer. 95% of problems are from cheap or incompatible ram, I hate to tell you this but is a fact.

Cheers, I suggest you go back and read the instructions I gave in my previous post, Steer clear of all ram that is not top of the line the others will cause you problems.

Donald Morgan wrote:

Many of the answers you get may be misleading so this is why you must get your information from the manufactures of the ram

The Ram manufacturers are the same ones that tell you they have 'Apple Certified Ram' when there is no 'Apple Certification" program.

2 in fact, both with 32GB and 256GB SSD's. They are production machines in a post studio, both work fine.

But you won't know until you try, and you don't want to try.

24GB is fine.

I have seen countless posts of problems with people trying to run 32GB

So have I; that is why I posted the links to the problems with running the max third party RAM in the 2010 machines and why I would not recommend Crucial as my first choice at the moment. My theory is that it may be a similar problem as the one which plagued those mid 2010/early 2011 machines. Having read all of those posts, I would not use 32 GB of any brand at the moment either and play it safe with 24 GB max - if there is a problem, it will be fixed as was the last one. Using known and proven to be compatible RAM helps with the troubleshooting (rather than muddying the waters, as it were, with cheap/different brands RAM which is not proven as to reliability.

And, with that, I am done here as I am not running with 32 GB of RAM.