When recently upgrading the RAM on my iMac 27 (will also work on iMac 21 / 21.5) from 4GB to 16GB, I decided to shoot a quick video to show everyone in one of my standard "how to" formats how easy it is to do this upgrade on your Apple iMac here in 2011. In all it took me just a total of 10 minutes from the time I shut down my iMac 27 until it was up and running full loaded with 16GB of RAM, turning into a processing monster!
The first step, is that you need to get the appropriate upgrade for you iMac. For me, I found the best deal to be from PRO Memory Upgrade where I purchased my 16GB of memory in two 8GB modules. PRO's description has it as:
8GB Apple iMac 27-inch 2.8GHz Intel Core i7 memory 2x 4GB PC3-8500 204-PIN DDR3 1066MHz Small Outline DIMM upgrade
Here's the actual link, http://www.memoryupgrade.pro/8gb-apple-imac-27-inch-28ghz-intel-core-i7-1066mhz-so-dimm.html which at the time of this posting was just costing $87.96 per 8GB pair. Which is extremely inexpensive to super charge your iMac.
Once you have your memory, you're ready to get started! Complete video of the upgrade process including instructions is at the bottom of the guide.
Step 1: Shut down you iMac, after first taking a latest Time Machine or other backup of you iMac. A memory upgrade is a simple and straight-forward process, but it is always best to play it safe. Once the iMac is shut down, disconnect all cables and then set it face (screen) down on a protected surface. I used the packing the iMac 27 came in underneath the screen to further protect it on the carpet.
Step 2: Get a precision tool kit and the #1 phillips screwdriver from that toolkit (or any #1 may do) Locate the panel on the bottom of monitor (closest to the base) and remove all three screws as well as the cover.
Step 3: Using the screwdriver flip out the plastic tabs covering the two sets of memory slots.
Step 4: Pull on the plastic tabs (may require some force) until each of the two tabs release or pop, freeing the memory for removal.
Step 5: Remove the memory, it may be helpful to use both hands with one pulling the plastic tabs to keep the memory out and using the other hand to remove the memory.
Step 6. Install the memory in pairs that are side-by-side between the two slots if you are not using identically matched memory..for example 2x2GB and 2x4GB. If you are using identically matched memory, you have less to worry about. Push in the memory modules until you feel them snap in.
Step 7: Re-insert the plastic tabs to cover the memory modules.
Step 8: Place the memory cover back on the base of your iMac 27 and screw in the 3 screws until they are snug.
Step 9: Power up your iMac and see the new memory and enjoy your new iMac 27 beast with 16GB of RAM memory!
Congratulations, now you have completed the upgrade of your iMac 27! Below is the full video, available in full HD, 1080p resolution with the same steps.
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