Information about RAM iMac options can be found in the appropriate forum at the Apple website. Information is also available at Mac Sales, Every Mac, MacWorld and DV Warehouse.
The DDR2 533 RAM is in fact compatible with an iMac. It is very advisable to upgrade an iMac with a DDR2 533 RAM as iMacs are really not known for their RAM.
The base 21.5" iMac comes with a 4GB of Ram and a 500 GB hard drive. You can upgrade to 8 GB of Ram. Top of the line 21.5" iMac can be upgraded to 16GB of Ram and comes with a 1TB hard drive and can be upgraded to a 2 TB hard drive. The 27" iMac comes with 4GB of Ram and 1TB hard drive. Can be upgraded to 16GB of Ram and a 2TB hard drive.
A new iMac comes with 4GB of Ram installed. You can add more at any time.
The iMac G3 memory slots take PC100 SDRAM.
8 GB of Ram is standard in all new iMac's. They use 8 GB because it is better than 4 GB.
iMACs are made without easily-accessible compartments for most components, particularly memory, which means the only way to add RAM is to take the iMAC to an authorized Apple dealer and have them add it. If they have what is needed to make the addition, it is likely to be a pricey one, so get a quote first in case it is less costly to just but a newer, higher RAM version of the iMAC.
"The best place to purchase iMac ram would, of course, be the Apple website. There, they will also help you with installation and anything else you might need to know. They have a great support system."
Purchase your ram from a reputable source such as Crucial. There is a plate on the bottom of your iMac screen. Remove that plate, which is held in place but 2 fillips screws, to gain access to the ram. Click the link to learn more.
Up to 4gb.
DDR memory ram would be very beneficial for you. To find more information, I would suggest on going in the following site: www.ddrmemoryram.com All the information needed would be found there.
By using freeware utility called CPU-Z by which I find out many useful information about my computer's CPU, mother board and RAM.
No, the memory modules must match. You should install two-2 GB ram strips.