Laptop won't boot up after new RAM upgrade

liamr7777

Active member
I've just had a look on Amazon and the products that RAM is listed as compatible with is pretty much Macs and Macbooks so I wonder if that is why they aren't working (was quite surprised as didn't even think Apple products could be upgraded!)


They are also compatible to work in note books and when put in to my laptop individually it works fine. The problem i'm having is that when I put them in together my laptop won't boot.
 

BlessedSquirrel

We love you Ukraine
I might by a single stick of 16GB ram instead of 2 8GB modules as it seemed to be the second slot that was causing an issue.

Any thoughts on that being something that might help?
The point is, any troubleshooting you’ve done up to this point is on questionable RAM, so the results aren’t valid.

Single channel RAM will have a performance impact as it’s dual channel RAM.

I would still buy a matched pair of decent RAM before coming to any conclusions.
 

FerrariVie

Super Star
You can also find Crucial on amazon, and even though they're a reputable brand, I had issues with them myself. But my case was easier to troubleshoot, as one module worked and the other didn't and they replaced the faulty one for free.

I also never heard about that brand and agree with @SpyderTracks that it is likely a memory issue. You very likely won't have issues with a single module, but having 2 will always gives you better performance
 
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liamr7777

Active member
You can also find Crucial on amazon, and even though they're a reputable brand, I had issues with them myself. But my case was easier to troubleshoot, as one module worked and the other didn't and they replaced the faulty one for free.

I also never heard about that brand and agree with @SpyderTracks that it is likely a memory issue. You very likely won't have issues with a single module, but have 2 always gives you better performance
OK sure thanks for that imput.

The point is, any troubleshooting you’ve done up to this point is on questionable RAM, so the results aren’t valid.

Single channel RAM will have a performance impact as it’s dual channel RAM.

I would still buy a matched pair of decent RAM before coming to any conclusions.

Problem here for me is, I don't want to start messing around buying items, waiting a few days, returning them if they don't work and waiting another 7 days to get my refund, then buying another pair to try out and if it's the same issue then having to return it and do the same thing again and then eventually just purchasing a single 16GB module. If a single 16GB module would do the trick with slight performance drop then i'd rather do that. As far as I can tell... it seems to be the second RAM slot but again... you guy may very well be right. It's a hard one to gauge.

Also, there is a cost element involved in all this as well which is a factor given the current pandemic... i'm just looking for a fast fix really... if such a thing exists! haha! I just don't get why they wouldn't work in tandem but work individually despite everything else adding up.

I might try buying the same module I have already installed. The Kingston DDR3 1600MHz 8GB and see if that works and if not then I suppose i'll purchase a single 16GB module.
 

liamr7777

Active member
Likely because they're not matched.
Have you checked the photo i provided earlier on in the thread? They are a matching pair of modules. I have attached below for your reference.
 

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BlessedSquirrel

We love you Ukraine
I just assumed that a matched pair means they are both exactly the same module. Make and specs wise. Is that what you mean?
No, a matched pair is matched at the silicon level. So it’s much more than just grabbing two that are the same specs, they’re actually matched to the point that they’re from the same batch, so cut from the same wafers. This way they are as close as possible in electrical and thermal properties.
 

liamr7777

Active member
No, a matched pair is matched at the silicon level. So it’s much more than just grabbing two that are the same specs, they’re actually matched to the point that they’re from the same batch, so cut from the same wafers. This way they are as close as possible in electrical and thermal properties.
I see. These two came as a pair (see the below link) and I have no way of knowing if they were made as part of the same batch. Is that something you can check before purchasing? Seems very specific.

 

BlessedSquirrel

We love you Ukraine
I see. These two came as a pair (see the below link) and I have no way of knowing if they were made as part of the same batch. Is that something you can check before purchasing? Seems very specific.

That's why you buy a reputable brand, because they will have control over the silicon and actually be able to create matched pairs. It's always marketted as such when it's actually a matched pair.

That brand just seems to be a knock off, I wouldn't think for one second that they're actually matched pairs.
 

liamr7777

Active member
That's why you buy a reputable brand, because they will have control over the silicon and actually be able to create matched pairs. It's always marketted as such when it's actually a matched pair.

That brand just seems to be a knock off, I wouldn't think for one second that they're actually matched pairs.
Fair enough. I have requested my refund and I am sending them back to amazon tomorrow.

I was planning to buy the same module as my current strip which is the Kingston DDR3 1600MHz 8GB and a technician at PCS even sent me the link where I can purchase that exact module but now i'm apprehensive to do that if you say it might not be matched?
 

BlessedSquirrel

We love you Ukraine
Fair enough. I have requested my refund and I am sending them back to amazon tomorrow.

I was planning to buy the same module as my current strip which is the Kingston DDR3 1600MHz 8GB and a technician at PCS even sent me the link where I can purchase that exact module but now i'm apprehensive to do that if you say it might not be matched?
If it were me, I'd always buy a matched pair.

Sometimes you'll get lucky and get exactly the same stick, but there are so many variables, it's usually quite difficult to get the same DIMM.
 

Bhuna50

Author Level
Apologies for my ignorance here, but could he buy a Kingston DDR3 1600MHz 16gb and try it with his 8gb and have a total of 24?

He gets his 16 stick then anyway if he cant.

I see that PCS sometimes does similar to this with an 8 and a 4 stick to make 12 - or does this "matched" issue come in?
 

liamr7777

Active member
Apologies for my ignorance here, but could he buy a Kingston DDR3 1600MHz 16gb and try it with his 8gb and have a total of 24?

He gets his 16 stick then anyway if he cant.

I see that PCS sometimes does similar to this with an 8 and a 4 stick to make 12 - or does this "matched" issue come in?
I only want 16GB so I would like to buy another 8GB strip if I can but if it's not matched then I might have an issue it seems.
 
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