iMac 27 inch 2011 Add RAM 20

My iMac was in mid-2011 like you, but yes. I changed the memory in December last year and used a Samsung DDR3 1600. At that time, I also visited some Apple forums when I bought it, and I also tested the filter to buy Kingston, but it is said that the imac is more picky about memory, and the four brands of memory used in the imac original have Samsung's, so I bought Samsung's, and it is normal to use it until now.

The memory upgrade recommendation is to use the same brand, the same batch, and one step in place.

Your problem is very common, the 2011 iMac is really good, but the biggest problem is the memory. 4G capacity was a good option in 2011, but today it's hard to meet, especially if you're running graphics software, which requires more memory.

I don't know which version of the operating system you're currently using, because iMac 2011 went through OS with the Snow Leopard system to the later Lion, and now you can also upgrade to the current Cougar system via the App Store. And as the system is upgraded, the content increases, and the operation will become more and more stuck, I have personally tested, to the system response speed is nearly reduced by 1 3Therefore, it is necessary to increase the memory.

As for installing DDR3 1333 4G memory modules, that's fine, but beware of a lot of counterfeits on the market in Kingston. However, it is not recommended to mix, because of the relationship between dual channels, you are inferior to 2G and 4G and plug in 2G 2G in actual use, and it is best to use the same capacity for memory. Mash-ups are not recommended.

Either simply replace it with two 4G RAM, or insert 2 2G RAM.

For more information, please refer to.

The 27-inch iMac** is subject to regulatory approval and is not available for sale until approval is received.

The 2015 iMac does not support memory replacement.

I can see it when the screw on the back cover is opened, and you can buy a memory module of the same model and frequency.

I asked Apple's technical department when I added memory, and said that I could only add the same size of memory, such as four 4G, or four 2G, up to four 8G. Because the Apple system allocates memory evenly, unlike win. I can't tell you the specifics. You can't pretend like that anyway.

Do you mean that two 4Gs are being added in the original two 2G states?

Laptop memory, but general laptop memory can't be used, it has to be dedicated.

5800 buy a shell It's all rubbish in it, you think about it yourself. . . The computer is a thing that you can assemble, so the cost can be calculated directly. You have to think that it's worth the flag, that's the value.

Take the model as the standard.,About what time is written in this machine, go to the official website to compare.。