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Question: New iMac, speed question

Hi folks!

I've just open my new iMac (same as here https://apple.co/2IwUVuD).

I must say that right now I have only 8 Gb of RAM, but, it's really slower (trying some applications) than my late 2011 with an SSD drive (that was close to be full all the time) and 12 Gb of RAM.

I'm deceived about that so far... adding RAM will make a big change?

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Thank you!

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Mar 17, 2018 2:32 PM in response to denis9009 In response to denis9009

One reason may be that Spotlight is still indexing. Wait until it finishes.

Another reason may be due to the slower 5400 rpm hard drive, if you did not choose an SSD.

Additional RAM will not increase speed unless you need it for the apps you are running, An SSD will make a dramatic difference in speed.

Mar 17, 2018 2:32 PM

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Mar 17, 2018 5:10 PM in response to denis9009 In response to denis9009

Well, you have a 27" iMac; however, you have chosen the base model. You also don't have a lot of RAM - I'd go with a minimum of 12 - 16 for a newer OS version (and the fastest processor I can afford if I want to run resource hogging/heavy apps. Here is the info re. a Fusion Drive on the sales page:

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What it means is that the SSD part is fast, but small and will only hold/work/use with boot up, launching apps, etc. The regular hard drive (which should be 7200 rpm on a 27" and a very slow 5400 rpm on a 21") should be ok, but obviously appear quite slow compared to an SSD. That hard drive will be where most of your activities - read/write - will take place. Personally, I will not have a Fusion Drive - ever. I tried one and returned the iMac. It is also difficult to manage if you want/need to partition and re-partition.

So, it may sound like nonsense, but it is what it is. If you are within 14 days of purchase, you can return it no questions asked and choose something more to your liking.

Mar 17, 2018 5:10 PM

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Mar 17, 2018 8:46 PM in response to denis9009 In response to denis9009

denis9009 wrote:

This is an absolute non sens... a new computer should be faster, not the contrary!

This would be true if you gave it the same specs (SSD). An SSD is way faster than any platter drive. Having platters, the drive has physical moving parts like a record with a needle that has to go across the record to read the data. If data is spread out throughout the drive, then the needle has to jump all over to get the information you need. A Fusion Drive is a "hybrid" drive. Basically, it's a platter drive that stores all your information and then also has a larger Cache then a normal hard drive. It uses this cache to store information that you use frequently so that information can be accessed quickly as it is something that is used frequently so figuring that is data that needs to be stored there. It's kind of like RAM, your computer can't access any data without it being in RAM, so in order for your computer to be able to run a program or anything like that, it has to first be loaded into RAM by your hard drive. The hard drive is way slower than RAM so your computer has to wait for the drive. If you have more RAM, there is more data that can stay loaded on your computer at the time that it is needed so you can in fact then have more programs running or larger programs running and keeping them up to speed giving it a faster speed, however, this is not going to make the hard drive access data any faster, it's going to just make it so you don't have to load it every time you reopen the program. This will hold true until you restart the computer at which time it is then going to have to load it again.

Upgrading your RAM will make the computer itself faster, but it is not going to make the data load any faster, this is totally controlled by the hard drive. When you purchased the computer, you were given the option to go with an SSD in place of the Hybrid Fusion Drive, this would make it "faster" than your old computer because everything is going to access data faster. Once you make the decision, unless you are comfortable taking the screen off the computer and getting into it, you're going to have to take it some where that they are comfortable doing that and they will charge you for it as well as a different drive. It's not a matter of the computer being slower than before, once you load it or if you do things that are processor intensive such as video editing or photo editing, you'll notice that the new computer is easily going to outrun the old computer. Especially with having additional RAM

Mar 17, 2018 8:46 PM

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Question: New iMac, speed question