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I'll have it this week actually. But, had to order another 16 as I didn't realise that i ordered 1 module of 16 and not two eights. So, going to have a total of 40GB instead.

Really? Well thats nice. I'm still looking at 7-18-17. :apple:
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Amazon has it in stock right now.

No. This is the correct Crucial RAM for the 2017. Not in stock. Make sure you purchase tested DIMM's. :apple:

Part Number
CT2K16G4S24AM
 
No. This is the correct Crucial RAM for the 2017. Not in stock. Make sure you purchase tested DIMM's. :apple:

Get any Crucial PC4-19200 SODIMM RAM and you should be fine.

I have been using this Crucial Ballistix Sport 2x16GB for a total of 40GB in my 2017 iMac since I took delivery 2 weeks ago and it has been flawless. Keep in mind that on Crucial's website, the RAM is noted to be Incompatible with the 2017 iMac.

You don't need to get the RAM that Crucial markets as iMac-compatible. See this thread for more details.
 
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Get any Crucial PC4-19200 SODIMM RAM and you should be fine.

I have been using this Crucial Ballistix Sport 2x16GB for a total of 40GB in my 2017 iMac since I took delivery 2 weeks ago and it has been flawless. Keep in mind that on Crucial's website, the RAM is noted to be Incompatible with the 2017 iMac.

You don't need to get the RAM that Crucial markets as iMac-compatible. See this thread for more details.

It will make a difference with an Apple Care issue if one arises. They will look for Apple RAM such as OCW, and Crucial have tested. But hey, it's your money guys. ;)
 
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It will make a difference with an Apple Care issue if one arises. They will look for Apple RAM such as OCW, and Crucial have tested. But hey, it's your money guys. ;)

It absolutely will NOT make a difference with AppleCare. That's misinformation. Apple doesn't care what third party RAM you install in your machine. They provide the specs and the instructions for you to do so. I've owned Macs for 11 years, installed third party RAM in all off them and have filed AppleCare claims numerous times with no such issues ever.

If you put in incompatible RAM and as a result have system instability, kernel panics, etc, you're obviously not going to be filing an AppleCare claim for that. Apple will advise you to remove any third party RAM you added to your system and test to see if it resolves your problems first.

But if you think Apple is going to get your machine back for a failed hard drive component of a Fusion Drive or for some other hardware failure and then check your RAM and say "warranty voided because this is not Crucial's iMac-certified part!", you're just wrong.
 
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It absolutely will NOT make a difference with AppleCare. That's misinformation. Apple doesn't care what third party RAM you install in your machine. They provide the specs and the instructions for you to do so. I've owned Macs for 11 years, installed third party RAM in all off them and have filed AppleCare claims numerous times with no such issues ever.

If you put in incompatible RAM and as a result have system instability, kernel panics, etc, you're obviously not going to be filing an AppleCare claim for that. Apple will advise you to remove any third party RAM you added to your system and test to see if it resolves your problems first.

But if you think Apple is going to get your machine back for a failed hard drive component of a Fusion Drive or for some other hardware failure and then check your RAM and say "warranty voided because this is not Crucial's iMac-certified part!", you're just wrong.

Ok, you win.

I'll never install anything but OEM Crucial (for Mac) in any Mac I own. Never have , never will. Other than Micron being a main OEM supplier for Apple, the shortages are from customer demand also. There is a reason for this. ;)
 
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No, we all win this one. ;) While it may make people feel better to buy RAM with a "Certified for iMac" label, there's no need to avoid perfectly functional alternatives without such a label that might be similar in price and not require weeks of waiting for restocking.

Quality RAM manufacturer (Samsung, Hynix, Crucial, Kingston, Corsair, etc) + 260-pin PC4-19200 SODIMM (non-overclocked if to be used in combination with the Apple RAM) = the formula for success when adding RAM to the 2017 iMac.
 
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Yes, this is in stock and has been. https://www.amazon.com/gp/product/B019FRCV9G/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1 I personally ordered this 16x2 and have it installed currently without any issues.

Good to hear and absolutely as expected. In this case the non-Apple-certified but perfectly functional alternative is both in stock and $15 cheaper. :)

It's the $15 Certified for Mac label surcharge.

Micron says they apply that label after intensive testing. Well, I ran Memtest86 on my supposedly (according to the Crucial website compatibility tool) incompatible for iMac Crucial Ballistix Sport + Apple Stock Ram combination for 4 passes and 5 hours in my non A/C room while I was out today at ambient temps of 35°C+ with zero errors. 40GB at 2400MHz.

Over two weeks of heavy usage, occasional gaming and no instability, kernel panics or otherwise.
 
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No, you have CT2K16G4SFD824A.

I am waiting for CT2K16G4S24AM.

But, thats just me. ;)

Why pay 15 dollars more? I honestly don't see the reason I mean it's still CL17 latency so why pay extra?
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Good to hear and absolutely as expected. In this case the non-Apple-certified but perfectly functional alternative is both in stock and $15 cheaper. :)

It's the $15 Certified for Mac label surcharge.

Micron says they apply that label after intensive testing. Well, I ran Memtest86 on my supposedly (according to the Crucial website compatibility tool) incompatible for iMac Crucial Ballistix Sport + Apple Stock Ram combination for 4 passes and 5 hours in my non A/C room while I was out today at ambient temps of 35°C+ with zero errors. 40GB at 2400MHz.

Over two weeks of heavy usage, occasional gaming and no instability, kernel panics or otherwise.

Ya I really don't understand why people are paying 15 dollars more for the exact same thing. They must be proud of the certified for Mac labeling.
 
Interesting. In the past, their Mac RAM was the exact same price as their regular RAM with the same specs, cuz it was the same RAM. However, now for the 2017 iMac I am seeing multiple pricing. Last month I paid $136.99 for 2x8 GB RAM.

http://www.crucial.com/ScanListView...7-inch,2017)&storeId=10151&modelCatId=2099009

That above link is what Crucial actually gave me when I asked about the 2017 iMac, I think the day after the iMac announcement.

Interestingly, two SKUs are present in my order description, shown below:

CT10559859 CT2K8G4S24AM.000 16GB UPGRADE FOR A APPLE IMAC (RETINA 5K, 27-INCH, 2017) SYSTEM

I paid $136.99 for it at the time.
 
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We agree, but it's even worse than that if you're bringing stuff like this into the equation.

Typical read-write power utilization for the Samsung 960 Pro PCIe SSD is 4-6 W, but the idle is around 0.1 W. If you look at active idle it's closer to 1.2 W. In contrast, some of the media-production oriented 7200 rpm drives use 6-9 Watts for read/write, but idle at 5-8 Watts. It will be lower for cheaper 5400 rpm drive, but they're still generally 3 Watts and up at idle, and much higher for read/write

Given that 98% of an SSD's time is at idle, it can be almost an order of magnitude difference overall in power utilization.

Well the original post was about heat, I agree that overall power usage is lower. But its not uncommon for a PCIe SSD to reach into the 60's in normal use in a ventilated case. That is beyond the normal the normal operating temps of most HDD's. And its not uncommon for them to throttle, which is typically around 70c and not unheard of them getting up to 80c with poor ventilation. Normal HDD clunking along at 25-35C is going to be one of the coolest operating components in the case.

Screen Shot 2017-07-03 at 4.08.29 PM.png
 
Just got mine too
i5 basic model with fusion drive, on my old mac mini i was on SSD over USB3

after restoring my system that i try to keep around 250Gb I tested the fusion drive with black magic and got
854 write 1277 read :eek: my old SSD was around 500 write 600 read, not sure if it will slow down over time but i work with small text and image files ( web developer )

i found an issue, i need to add an USB extension cable between my iMac and usb 3 hub
on the usb3 hub are connected 2 WD usb3 external HDD, since copy seemed pretty slow i test and got around 29 read / write that i guess is low for usb3 disk

does the extension cable need to be an usb3 cable? can't think about anything else
 
Interestingly, two SKUs are present in my order description, shown below:

CT10559859 CT2K8G4S24AM.000 16GB UPGRADE FOR A APPLE IMAC (RETINA 5K, 27-INCH, 2017) SYSTEM

I paid $136.99 for it at the time.

The point is to get whatever good quality RAM is available and at the best price for you and not to worry about labeling.
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I'll never install anything but OEM Crucial (for Mac) in any Mac I own. Never have , never will.

More power to you. :)

Other than Micron being a main OEM supplier for Apple, the shortages are from customer demand also. There is a reason for this. ;)

Yes, the reason is that their marketing works. Most average users aren't visiting to these forums and have no idea that all they need to do is to get good RAM that follows the specs on the Apple memory upgrade pages.
 
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after restoring my system that i try to keep around 250Gb I tested the fusion drive with black magic and got
854 write 1277 read :eek: my old SSD was around 500 write 600 read, not sure if it will slow down over time but i work with small text and image files ( web developer )

I've tried the fusion drive 2to but sometimes when I'm doing test with black magic I've 200 or 300 write ;( I'm returning the fusion drive iMac and take the SSD one
 
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The point is to get whatever good quality RAM is available and at the best price for you and not to worry about labeling.
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More power to you. :)



Yes, the reason is that their marketing works. Most average users aren't visiting to these forums and have no idea that all they need to do is to get good RAM that follows the specs on the Apple memory upgrade pages.

Advice.;)

"When I let go of what I am, I become what I might be."

Lao Tzu
 
I got the crucial ram - have 32gb in this new maxed out iMac. Have no issues at all with it, and as others here always tend to buy from Crucial for these reasons.

This iMac is running like a champ now. No issues at all with the computer and is a breath of fresh air on my last few years of Apple disappointment in their computers. I am yet to trouble it too much, and have done some extensive image manipulation on it so far [with all sorts of apps running at the same time]. Love it.

the 32gb certainly makes a difference to my usage although could get by on 16gb. Its nice to know for those occasions I hammer the computer the power is there [like now currently using 22gb....].

TBH can't fault the new iMac too much and glad I held out for it. The only thing is the clunky bezel - Why?
 
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Ram is now installed. It spat out a couple of errors at first and crashed the machine twice but then it booted up fine and no issues so far.
 
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