A new iMac comes with 4GB of Ram installed. You can add more at any time.
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 iMac G3 memory slots take PC100 SDRAM.
No, the memory modules must match. You should install two-2 GB ram strips.
"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."
You will need to take your iMac apart and replace the hard drive. A better solution is to connect an external hard drive to your Mac via the Firewire port.
A memory cache is small amount of RAM that is much faster than the rest of RAM?
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 highest amount of RAM that the Apple laptop can support is 2GB. To be able to use the maximum amount, install the memory in each socket of the computer.
No. Different iMacs require different types of memory modules. Most major Mac-friendly RAM vendors should be able to recommend the correct RAM for your model iMac. Please see links below for more details.
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.
physical memory
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.