That said, it does support twice as much memory as Apple states, and many people do find success adding more memory than apple recommends. I found with my Macbook Pro that getting "close enough" still resulted in an occasionally flaky system, and I had to not only get the correct memory speed, but the same timing for it to work. Note that Apple may update the EFI at any time and enforce it's stated maximum RAM, and of course Apple won't support going above the maximum RAM.Īlso keep in mind that you have to match Apple's memory timing specifications for new memory very carefully. You can check out your specific iMac by finding it on this list, then checking out the RAM section:Īlso, here's a list of the unofficial max ram support for every Apple computer since the G3: But I am very likely to replace my original 2x2GB=4GB with 2x4=8GB to the total of 16GB.All 2011 iMacs will support 32GB unofficially except for the late 2011 iMac "Core i3" 3.1 21.5-Inch (MC978LL/A - iMac12,1 - A1311 - 2496) which appears to be capped by EFI at 8GB. I didn't want to risk throwing too much money away based on semi-official info that my iMac can take 4x8GB=32GB. I just upgraded memory on my iMac 27" mid-2011: added two 4GB units to the existing 2x2GB to the total of 12GB. And regret not upgrading to 32GB if/when someone comes up with convincing confirmation of 1)successfully upgrading, and 2)seeing iMac actually using all 32 (or at least beyond 16) But I am very likely to replace my original 2x2GB=4GB with 2x4=8GB to the total of 16GB. This to me is another benefit of more RAM: not only things come up and run faster - disk works less, and perhaps will live longer. Cache: 4.65 GB (it is my understanding that Cache is not *part* of Memory Used, but *in addition to*).Īltogether: iMac happily sucked into memory close to 11GB of stuff => much less disk I/O (I wish I had kept track of Disk I/O before I installed the upgrade). With the following apps running - Safari (8 tabs), Mail, Activity Monitor, LogicPro X, Photos - I see these figures: 1TB SSD Configurable to 2TB, 4TB, or 8TB SSD Memory 16GB of 2666MHz DDR4 onboard memory Configurable to 32GB or 64GB of memory Graphics 2. Immediate effect: it seems that Safari and Mail come up faster. If you've got 16 GB and a hard drive i would suggest your best bang for buck upgrade would be an SSD.Ĭlick to expand.It really depends. Going from 16 GB to 32 GB for general non-ram-intensive stuff will be even less noticeable. 1,199: Apple M1 chip with 8core CPU, 7core GPU, and 16core Neural Engine, 8GB unified memory, 512GB SSD storage 1,299: Apple M1 chip with 8core CPU, 8core GPU, and 16core Neural Engine, 8GB unified memory, 512GB SSD storage As you can see, the extra Grant gives you an 8core GPU while leaving everything else the same. Mactracker provides detailed information on every Apple Macintosh, iPod, iPhone, and iPad ever made, including items such as processor speed, memory, graphic cards, supported OS versions, price, storage, and expansion options. SSD in the box, and that improvement won't be significant. Download Mactracker for macOS 10.12 or later and enjoy it on your Mac. It was like 10% of the improvement if that when doing basic stuff, and that was due to hard disk cache. I did notice a general speed up on my 15" MBP going from 8 GB to 16 GB with a hard drive, but it was nowhere near the difference between 4 GB and 8 GB for general use. You can perhaps check out the memory pressure graph in activity monitor and see how bad it is when you have a typical "large" workload running.įor most people 16 GB is plenty (hell, 8 GB is plenty for most, especially with an SSD), but you may be different. If you're running an SSD then less likely.īut if you are working with large video files, multiple large images in photoshop, other operating systems in virtual machines, etc. If you're just doing regular "Stuff" then probably not. More RAM is a case of diminishing returns unless you are running something that needs it.
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