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SpokenTruth said:
Eric is correct. You cannot use older RAM on a newer motherboard. The DIMM slots are keyed to accept only a specific generation of RAM.

The RAM you have should have a model number on a sticker. Buy that exact same thing. If no sticker, install CPU-Z, go to the SPD tab, click the Slot drop down box until all the fields populate with data and copy the Part Number. In fact, install CPU-Z anyway. Go to the Mainboard tab, look up the manufacturer and model to verify what the maximum capacity RAM that motherboard supports. Some boards will not support 32 GB.

This is a more thorough way of going about it no doubt. Though I've never heard of a mobo with two RAM slots, that comes with a single stick of any amount (16GB here), that doesn't support double the amount of that single installed stick (32GB here). Not saying that scenario is impossible, just unlikely.

*If the PC is second hand though and not new, then the previous owner may have just went with one stick of the max allotted RAM for the mobo, which would mean in this particular case, doubling the 16GB stick would be too much.

Last edited by EricHiggin - on 09 January 2020

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Ye thats stuff i usually figure out the moment it wouldnt have fitted into the slots.
had that happen once with my old pc was in a store and they had a neat discount on a processor came home trying start replacing shit i think had to upgrade the motherboard so i went to the store again and then had to do another trip for new ram, that kinda got me cold for upgrading
Instead of just the cost of the processor I spend 4/5 times that amount, ugh



 "I think people should define the word crap" - Kirby007

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Ya don't be this guy:

See what CPU-Z tells ya first. Then go look up the mobo details and find the max RAM allotment.

If the mobo can't handle 32GB by chance, then you might as well just stick with that single 16GB stick, or buy two new 8GB DDR4 sticks. You can always sell that 16GB stick if you need the money, and maybe those 8GB DDR3 sticks as well.

If you're going to buy new RAM, faster (higher MHz) is better in general, more useful for Ryzen though, but you also would need to know what the mobo and CPU support for max RAM speeds. If you buy faster RAM then your system supports, it should still work, but it will be down clocked and you will have paid for faster RAM for nothing. If your mobo doesn't support 32GB, then while your searching, look up the max supported RAM speed. CPU tab info will also give you what you need to search it's max supported RAM speeds. Whichever RAM speed is the slowest max between the CPU and mobo, that's the max you should bother going with. The faster the RAM, the more it costs as well, so depends on what your budget would be.



SpokenTruth said:
EricHiggin said:

This is a more thorough way of going about it no doubt. Though I've never heard of a mobo with two RAM slots, that comes with a single stick of any amount (16GB here), that doesn't support double the amount of that single installed stick (32GB here). Not saying that scenario is impossible, just unlikely.

*If the PC is second hand though and not new, then the previous owner may have just went with one stick of the max allotted RAM for the mobo, which would mean in this particular case, doubling the 16GB stick would be too much.

I've seen some HP ProDesk models do it. 2 slots, 16 GB is slot 1, 24 GB max on the board.  Yeah, we were scratching our heads on the logic of it too.

But these are more likely to be ordered online with the custom build rather than store bought. 

Hmm. Learn something new everyday. Good initial point though. Pre-builts can at times make you think you've got head lice with what's going on inside that case. Loose connections or backwards fans seemed to be their bread and butter. Guess the force is still strong with "hold my beer".



SpokenTruth said:
EricHiggin said:

Hmm. Learn something new everyday. Good initial point though. Pre-builts can at times make you think you've got head lice with what's going on inside that case. Loose connections or backwards fans seemed to be their bread and butter. Guess the force is still strong with "hold my beer".

My favorite WTF will always be HDD stacking.  I forget the model but they had 4 HDDs stacked up inside a metal frame.  You literally had to remove all of the above HDDs to get to any below it.  And the cable management required full disconnect of all SATA data and power cables to get to any drive.

LoL. An enclosed metal frame. I'm sure the cooling solution was totally acceptable as well... What could go wrong here?... They must have had auto engineers design it. Empty the engine bay just to get to the starter, because why not?



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So opened the case: MOBO has 4 RAM slots, with only one slot filled, which as far as the screenshot tells me is correct

and if i understand correctly the marked x16 means max 16gb right?

edit: im an idiot, looks like another 16gb stick isn't a problem

Last edited by kirby007 - on 10 January 2020

 "I think people should define the word crap" - Kirby007

Join the Prediction League http://www.vgchartz.com/predictions

Instead of seeking to convince others, we can be open to changing our own minds, and seek out information that contradicts our own steadfast point of view. Maybe it’ll turn out that those who disagree with you actually have a solid grasp of the facts. There’s a slight possibility that, after all, you’re the one who’s wrong.

kirby007 said:

So opened the case: MOBO has 4 RAM slots, with only one slot filled, which as far as the screenshot tells me is correct

and if i understand correctly the marked x16 means max 16gb right?

edit: im an idiot, looks like another 16gb stick isn't a problem

"The Shire"? LOTR fan?

SpokenTruth said:
That motherboard has a maximum support of 64 GB so you should definitely be good adding a second stick of 16 GB.

- Supports PC4-21300 (DDR4-2666)

- Supports 8 GB and 16 GB DDR4 UDIMMs

- Supports up to 64 GB (unbuffered) with 16 GB DIMMs on 64-bit computers.

A stick using those RAM part numbers isn't popping up very easily. Newegg has a stick with a slightly different part number but it's out of stock anyway.

https://www.newegg.com/p/0RN-001J-00K74

Finding another identical stick may not be so easy.



Loking for a hyperx 2666mz stick would work



 "I think people should define the word crap" - Kirby007

Join the Prediction League http://www.vgchartz.com/predictions

Instead of seeking to convince others, we can be open to changing our own minds, and seek out information that contradicts our own steadfast point of view. Maybe it’ll turn out that those who disagree with you actually have a solid grasp of the facts. There’s a slight possibility that, after all, you’re the one who’s wrong.

Did i say that the fans arent really impressive either^^

Hmm https://www.hyperxgaming.com/us/memory/fury-ddr4?partnum=HX426C16FB3/16 80,- 



 "I think people should define the word crap" - Kirby007

Join the Prediction League http://www.vgchartz.com/predictions

Instead of seeking to convince others, we can be open to changing our own minds, and seek out information that contradicts our own steadfast point of view. Maybe it’ll turn out that those who disagree with you actually have a solid grasp of the facts. There’s a slight possibility that, after all, you’re the one who’s wrong.

kirby007 said:
Loking for a hyperx 2666mz stick would work

You might have problem though if they aren't identical. It also may work fine. Won't know until you try.

Or get a dual channel kit of 2x8 or 2x16, depending on how much you want and your budget, and then sell that single 16GB stick.

SpokenTruth said:
EricHiggin said:

"The Shire"? LOTR fan?

- Supports PC4-21300 (DDR4-2666)

- Supports 8 GB and 16 GB DDR4 UDIMMs

- Supports up to 64 GB (unbuffered) with 16 GB DIMMs on 64-bit computers.

A stick using those RAM part numbers isn't popping up very easily. Newegg has a stick with a slightly different part number but it's out of stock anyway.

https://www.newegg.com/p/0RN-001J-00K74

Finding another identical stick may not be so easy.

I too just checked around and HP seems to have used a low performing batch of RAM from Kingston. Getting an exact match will be very difficult and perhaps event too costly.

Next best thing is to check the Memory Qualified Vendors List but I don't see one for this board.  Thanks, HP. 

Match the RAM specifications as close as possible from Kingston and hope for the best. 

Ya the latency is pretty high. That's HP for ya. Ok, but not great.

This might work but used. A 6 instead of 9 in the part number. Close, but how close really? $90

https://www.ebay.com/c/16028659231

Single 16GB stick from Newegg, but no idea if it'll work together, and pretty expensive. $282

https://www.newegg.ca/hyperx-16gb-288-pin-ddr4-sdram/p/N82E16820104748

New 16GB kit from Newegg with better latency, and reasonable pricing. $95

https://www.newegg.ca/hyperx-16gb-288-pin-ddr4-sdram/p/N82E16820104860

New 32GB kit from Newegg with better latency and reasonable pricing. $150

https://www.newegg.ca/hyperx-32gb-288-pin-ddr4-sdram/p/N82E16820104863