🍒 Immediately test your Mac's RAM upgrade - CNET

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I bought an extra 2x4GB off Amazon (Crucial Ram). But then, it looks like I cannot use all 4 ram slots at the same time. The iMac won't even start, only show a.


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Computer won't boot after RAM upgrade solved

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Recent changes: We put the RAM in just a couple days after we got it. -- Operating system: macOS System specs: Retina 5K, inch.


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Mac won't boot - SOLVED

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Recent changes: We put the RAM in just a couple days after we got it. -- Operating system: macOS System specs: Retina 5K, inch.


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What I did was try to mix it by putting the 4gb + 4gb mhz ram and it won't boot to anything with continuous loud beeps. So my laptop.


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Upgrade your iMac's RAM in less than 5 minutes

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Recent changes: We put the RAM in just a couple days after we got it. -- Operating system: macOS System specs: Retina 5K, inch.


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What I did was try to mix it by putting the 4gb + 4gb mhz ram and it won't boot to anything with continuous loud beeps. So my laptop.


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Troubleshoot Ram - Pt 5 How To Test Ram If Computer Not Turning On Or PC Turns On But No Display

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Just work through them in order, unless your Mac won't boot after a failed NVRAM (non-volatile random access memory) is a special section of memory that.


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Mac Won't Boot

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I bought an extra 2x4GB off Amazon (Crucial Ram). But then, it looks like I cannot use all 4 ram slots at the same time. The iMac won't even start, only show a.


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How to reset your Mac's NVRAM, PRAM, and SMC

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When you say Won't Start, what do you mean? No startup sound? Back screen? What brand of memory did you install? Last edited by dtravis7;.


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What I did was try to mix it by putting the 4gb + 4gb mhz ram and it won't boot to anything with continuous loud beeps. So my laptop.


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How to: 27-inch 5K iMac (2019) 128GB RAM Upgrade - Save $$$!

I'll give that a go when I get home from work. Same goes with just using the original ram. Will post back with results. Except they are 8GB modules instead of 4GB. Can't mix and match sizes. Jan 9, AM in response to babowa In response to babowa. Sign in Sign in Sign in corporate. I haven't tried using just slot 2 and 4. I just got off the phone with Apple, and they are saying all modules have to be the same size. Question: Q: iMac won't boot after ram upgrade More Less. But both sets are CL So timing shouldn't be an issue either. This way you avoid fooling around for a couple a days trying to figure out why your machine won't boot up. Since you said that it works with either installed, I'm wondering if it's either a brand or a size mixture issue. User profile for user: Kappy Kappy. Installed the original 2 modules back with the new ones. Not even a chime, or warning chimes. Thanks for the link babowa. Posted on Jan 9, PM. As long as I install ram in pairs, it runs like a charm. Giving to my sister. No error. As I mentioned, each set used by themselves, the iMac boots with no issues. And after wasting your time you go get top of the line Ram and your problem goes away like magic. Desktops Speciality level out of ten: 1. You must also be sure the modules are seated fully. For some reason, my iMac late 3. I still have my Mac Pro. All replies Drop Down menu. But when I put all 4 together, the iMac doesn't boot up. Posted on Jan 9, AM. RAM must be installed in matched pairs. Loading page content. When I installed all modules, they all snapped into place. Communities Contact Support. I didn't wait 30 sec to see if it would boot. Mine doesn't at all with all 4 modules installed. Same size in the two upper slots and the same size in the lower slots. To my understanding, you have to use 1 and 3 first. Browse Search. They said, sometimes, systems takes a little longer to start up when new ram is added. Hey Boomer, I went through all info yesterday. Conflicting info. Thanks to all for their input. I've spoken to a couple of IT guys at work about the 30 sec comments I've read. You can hear and feel them snap in. Reply Helpful Thread reply - more options Link to this Post. All modules need to have the same specs, and those must match the requirements for your model. Not even the chime. Answer: A: Answer: A: Success! It's only when all 4 are used at the same time, that the iMac doesn't start. Same specs as the original modules that came with the iMac. Can anyone confirm this? And there are different thoughts about Matched Pairs. Jan 9, AM. Jan 9, AM in response to babowa In response to babowa Thank you, babowa.{/INSERTKEYS}{/PARAGRAPH} Never heard of any Mac taking 30 sec to just chime in. Memory install However, there were problems when it was close to or max capacity of a mix or only third party RAM. I thought maybe the timing was off between the two sets. Hit the power button and waited about 30 sec. So other posts I've read where people's systems need 30 sec or so to verify new ram before booting up, is true. Still no luck. If that doesn't work, I'm going to get another set of the Mushkins, so that all modules are exactly the same brand, size and specs. Including the install instructions in About this Mac, just to make sure I wasn't missing anything. However, the size in the upper two slots and lower two slots need not be the same. User profile for user: babowa babowa. I'm going to try the 30 sec wait and see what happens. The iMac is a new purchase. Reading through several of them, the people with issues say their iMacs act strangely, including random shutdowns. Is there a fix? Jan 9, PM in response to babowa In response to babowa. I didn't try waiting that long after hitting the power button. I use Mushkins in my Mac Pro, and they work just fine. More Less. My Mac Pro has different speed ram modules, with different sizes in it. Which is strange, because I've never heard of this. Ask a question. I made sure they were all securely placed. Well, I don't have a brand new iMac, so I can't say if what Apple said is correct except that I have seen threads here with people mixing different size RAM successfully; however, my first question would be:. Also, I've read a couple of people had to wait 30 seconds for the chime when they installed new ram in their iMacs. View answer in context. Both are confirmed to have the same specs. Which means even with their issues, their iMacs still boot up. I'm wondering if slot 2 and 4 are maybe damaged? I've even heard the new iMacs don't have to have ram installed in pairs. And all ram shows up correctly. User profile for user: Eric Shawn2 Eric Shawn2. Apparently because it does a diagnostics before it actual starts to boot. I've tested the new ones on their own in the iMac, and the system boots up fine. {PARAGRAPH}{INSERTKEYS}To start the conversation again, simply ask a new question. I said I was going way out on a limb but I did see some threads here Hope getting four of the same works for you - personally, I would have ordered new ones from OWC or Crucial and returned the Mushkins Not to step on anyones toes here but I was always told to buy Top of the Line Ram. It can take considerable pressure to get them to "click" into place fully. I'm setting it up for her. New ram is exact same specs as original that came with the iMac. Jan 9, PM. Page content loaded.