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Going to order RAM for my new 2019 iMac today, Best one, OWC?

Benz63amg

Benz63amg

macrumors 601
Original poster
Oct 17, 2010
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Hey guys, my 2019 iMac (top tier $2299 model) came with 8gb ram and I want to upgrade it this week. What is the best quality ram to get? OWC? Should I order from OWC directly or through amazon?

What is the recommended amount of ram I should upgrade to without it being an overkill for optimal performance? Would adding 2 x 16gb sticks to the system for a total of 40GB Ram be optimal or is it an overkill and I should just add 2 x 8gb sticks for a total of 24gb RAM?

Can you guys please give me a direct link to order the proper RAM type I need from OWC to make sure I get the right one, thank you in advance

On OWC’s Website is says “install in pairs for best performance”, what does that mean? Since there’s already an 8gb stick in my iMac from the factory(or are there 2 x 4gb sticks from the factory inside my iMac right now?), if I was to add 2 x 8gb sticks, that will be a total of 3 sticks (considering there’s 1 x 8gb sticks from the Apple factory)and won’t be an installation in “pairs”, so what would be the optimal way to Upgrade the ram then?

My previous iMac with a mid 2011 27 inch iMac with 12GB of Ram.
 
Last edited:
How hard is it to upgrade the RAM yourself? I'd love to buy 8 and upgrade to 32 myself. Does it have 2 or 4 DIMM slots?
 
pshufd said:
How hard is it to upgrade the RAM yourself? I'd love to buy 8 and upgrade to 32 myself. Does it have 2 or 4 DIMM slots?
Click to expand...

It’s not too hard I watched videos on YouTube on how to do it.

I actually just went ahead and ordered a 16gb kit from OWC to bring the total ram of my new 2019 iMac to 24GB, I didn’t need 40GB of total ram so getting a 32gb kit made no sense. 24gb should be plenty

This is what I got : https://eshop.macsales.com/item/OWC/2666DDR4S16P/

So currently there are 2 x 4gb sticks installed in the iMac as that’s how it came from the factory from Apple, I’ll be simply adding 2 of these sticks that I just bought to bring the total ram to 24.gb
 
Benz63amg said:
It’s not too hard I watched videos on YouTube on how to do it.

I actually just went ahead and order a 16gb kit from OWC to bring the total ram of my new 2019 iMac to 24GB, I didn’t need 40GB of total ram so getting a 32gb kit made no sense. 24gb should be plenty
Click to expand...

Did you order 2x 8Gb?
 
Benz63amg said:
It’s not too hard I watched videos on YouTube on how to do it.

I actually just went ahead and order a 16gb kit from OWC to bring the total ram of my new 2019 iMac to 24GB, I didn’t need 40GB of total ram so getting a 32gb kit made no sense. 24gb should be plenty
Click to expand...

Sounds good. From your post it looks like it has at least four slots so it's nice that you can add it without having to toss or sell the old ones. I'm running two MacBook Pros with 16 GB. One uses most of it and the other probably uses 10 GB. I have two trading programs and they can use a lot of memory. 24 should be more than enough for now. Nice to know that 32 is an option down the road. I will wait to hear what others get for memory and how it turns out.
 
pshufd said:
Sounds good. From your post it looks like it has at least four slots so it's nice that you can add it without having to toss or sell the old ones. I'm running two MacBook Pros with 16 GB. One uses most of it and the other probably uses 10 GB. I have two trading programs and they can use a lot of memory. 24 should be more than enough for now. Nice to know that 32 is an option down the road. I will wait to hear what others get for memory and how it turns out.
Click to expand...

Yeah these iMacs support up to 128GB of ram actually
 
Do you know the CAS latency of that Ram cos i can't find it anywhere and it's stopping me ordering similar ram from crucial.
 
Benz63amg said:
Why don’t you order from OWC? The ram from them is considered the highest quality and you can see that most people here on the forum use that ram as well,

This is the proper ram for the 2019 iMac:

16gb kit:
https://eshop.macsales.com/item/OWC/2666DDR4S16P/

32gb kit:
https://eshop.macsales.com/item/OWC/2666DDR4S32P/
Click to expand...

I am in the UK, i would have to ship it from the US. Also i want to know the CAS of the existing imac ram before i put OWC's in as i have no idea what there is.

If you go here https://www.crucial.com/ and click scan computer, it will tell you EXACTLY what ram apple have installed, you need to make sure the OWC stuff is the same.

I have asked on another thread for an existing 2019 imac owner to please post this as i dont have my imac yet and so cant. If you do run this test, please be so kind as to post it here so i can also see the ram and seek out identical ram.
 
hardtofin said:
I am in the UK, i would have to ship it from the US. Also i want to know the CAS of the existing imac ram before i put OWC's in as i have no idea what there is.

If you go here https://www.crucial.com/ and click scan computer, it will tell you EXACTLY what ram apple have installed, you need to make sure the OWC stuff is the same.

I have asked on another thread for an existing 2019 imac owner to please post this as i dont have my imac yet and so cant. If you do run this test, please be so kind as to post it here so i can also see the ram and seek out identical ram.
Click to expand...

I installed 64GB of this Crucial RAM in on April 5 with no problems, Crucial 32GB Kit (16GBx2) DDR4 2666 MT/s (PC4-21300) DR x8 SODIMM 260-Pin Memory - CT2K16G4SFD8266. The RAM is CL19 and the RAM from Apple was also CL19. Accepted right away and running at 2666MHz. Crucial has responded to this question on Amazon in the US and Canada saying it is compatible with 2019 iMac. Hope this helps.
 
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kaintxu said:
Would you say OWC is better considered than crucial?

I always thought they were on par
Click to expand...

Everyone highly recommends OWC so I’ll trust them with the RAM, Crucial is a reputable brand as well
 
I'm thinking about this mob.
Dunno anything about them. but the 2 reviews say it works fine for 2019 iMac. It hits the price point and hits all the things that seem to be important.
Anybody see any red flags?
 

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pshufd said:
How hard is it to upgrade the RAM yourself? I'd love to buy 8 and upgrade to 32 myself. Does it have 2 or 4 DIMM slots?
Click to expand...

It's so easy even I can do it. That's coming from someone who would not really want to upgrade ram on the 2018 Mini. I think I could but would be afraid of damaging one of the connectors in the process. For the current iMac you basically just push a button to open a little door, release a couple of restraints, slide the ram into the available slots. Then close things up. There are many videos on line.
 
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hardtofin said:
Do you know the CAS latency of that Ram cos i can't find it anywhere and it's stopping me ordering similar ram from crucial.
Click to expand...
If RAM is correct for the iMac, latency is not an issue. Period.

OWC doesn't make RAM. They buy and resell and warranty. Their customer service is excellent. Yes, they often cost a little more but price isn't everything.
[doublepost=1554768192][/doublepost]
SkiHound2 said:
For the current iMac you basically just push a button to open a little door, release a couple of restraints, slide the ram into the available slots.
Click to expand...
Just make sure you put them into the correct slots. If you order an 8G iMac, it's really easy—insert into the empty slots.

If one where all 4 slots are filled, make sure you consult the correct diagram for your year and model so that you don't mis-match pairs. In that case, where you install makes a big difference.
 
SkiHound2 said:
It's so easy even I can do it. That's coming from someone who would not really want to upgrade ram on the 2018 Mini. I think I could but would be afraid of damaging one of the connectors in the process. For the current iMac you basically just push a button to open a little door, release a couple of restraints, slide the ram into the available slots. Then close things up. There are many videos on line.
Click to expand...

That doesn't sound bad.

I've taken apart MacBook Pros before - the ones with 40 screws. Also built PCs and replaced just about everything.

I have a 27 inch iMac, though, that I wouldn't work on after watching a video.
 
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