Look for either the year your computer came out or the model number. Unfortunately RAM has a multitude of much finer grained timing that just the obvious “1333MHz”.
Note the location of the notch on the bottom of the RAM so that you can orient the new RAM correctly. My Mac Pro shipped with the minimum 4 GB of RAM. So keep it depressed until you can remove the compartment door completely. But the choice really comes down to how old your computer is and how you use it. If you hear one tone repeating every 5 seconds it means that no RAM is installed. TIA - stuck with beachball!Only the original poster can award points - don't worry about it, I'm not here because of the points.... glad I could help!MacBook Pro, OS X Mountain Lion (10.8.3), with SSDMy MBP will use +/- 3 GB with just Firefox and Mail open - this under Lion or Mountain Lion.Will I lose3 something by doing this? I use OWC for almost everything.Of course. One advantage of upgrading RAM on an older iMac is that it's relatively affordable. Apple pairs them (usually) in slots 1 and 3 and you can add RAM in slots 2 and 4. No, they put in four 1 GB chips.Ah!
I use Mail, Safari, and Quicktime.I don't see how to give you points.The problem of this is that you will lose Dual Channel, which provides better performance, but this will workYou can keep the original 2 x 2 GB (matched horizontally), take out the other 2 x 2 and replace them with 2 x 4 GB (also matched/installed horizontally).
And those sorts of crashes can be notoriously difficult to diagnose.The computer I’m working from at the moment has just 4GB and it works just fine running Windows 10 with a basic image editor, my preferred text editing app and a few browser windows open. Locate the two levers on the right and left side and push them outward to release the memory cage.13. For example, use the first and third slot or the second and fourth slots.10. No, Don’t mix ram. Probably the biggest choice you'll have to make is how much to add. 27-inch iMac vs. 21.5-inch iMac RAM access .
Or are the paired slots 1 and 3, and 2 and 4, as babowa is suggesting?Click on the word "here" in my link above. Disconnect the power cord and any other cables connected to your iMac.Esto también se puede leer en español.Adding more RAM to your iMac is an easy way to give your computer more multitasking juice. Install the new RAM by orienting the notch the correct way, setting it down in the slot and pressing firmly until you feel and hear it click into the slot.
Once all your RAM is installed, put the door back on, stand your iMac upright and plug it back in.Once you have your RAM and are ready to install, shut down your iMac and give it time to cool off.Apple has made upgrading the RAM ridiculously easy on 27-inch iMacs.5. And then I put the third party pair of 8GB DIMMs into the last two slots thinking that that would properly "pair" the two sizes.After checking that, you can install the amount of RAM you want. For example, mine is: iMac (27-inch, late 2013).2.
There are 2 memory slots free/available, and I want to add RAM to these two slots. It shows Apple's instructions for installing RAM.
Only for the simple reason that two 4 GB chips are cheaper than one 8 GB chip. If your iMac has 4 slots, then yes you can have 2x2Gb and 2x4Gb for 12Gb providing you keep them in their pairs (2,2 and 4,4 rather than 2,4,2,4) and the spec of your new 2x4Gb match the memory the iMac can use. Why not just the first two like normal Earth-dwellers? If you get a good deal on slightly faster DDR3 1600 you’ll probably be OK as your motherboard will underclock the faster chips to match the slower one.© 2007 - 2020 Pedestrian GroupYou’d think two sticks that say 1333 should be the same but when they have different CAS or RAS timings… ugh random crashes ahoy! In the section for my laptop (13″ Pro, Late 2011), it says: Additional Notes: For best performance, fill both memory slots, installing an equal memory module in each slot. Depending on the age of your motherboard you may be restricted to the type and size of memory you can install. But I'm confused because Apple put the two 4GB DIMMs in slots 2 and 4 when it shipped.
It's so odd I imagine it's on purpose.ideally i would like to make use of the 2 original 4g cards, hence the 24g option being considered.iMac, OS X Mountain Lion (10.8.5)Then I switched the DIMMs up. A bunch of people are saying "the performance is worse", but not explaining why. Yes you can mix different sizes of memory. Since late 2012, 27-inch models have a door behind the stand that gives you easy access so … Holding the sides, lay the computer slowly face down on the towel.The button to open the RAM door is in the circular indent where the power cable goes.Even if you aren't buying a new iMac, upgrading the RAM on your old computer is a quick and affordable way to give your computer more multitasking juice to handle all of those open tabs in your Chrome browser. If you are removing the existing RAM from your iMac, pull the module straight up and out. Generally, it is best to match RAM in pairs, but it should be ok.You should check in Activity Monitor (Applications > Utilities) to see what is using your memory; having 8 GB installed should be plenty unless you are editing/rendering video, graphics, photos, etc.we have 2 new 27" iMac's 2.9 QC.
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