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- Adding RAM in dual channel mode
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07-15-2019 07:11 AM
In my ProBook 450 g5, this 4 GB ram is installed. SK-hynix-HMA851S6CJR6N-PC4-2666V-2666MHz.
Now I want to add this RAM Crucial Ddr4 2400 MHz c17 8 gb .
Will these two work fully in dual channel mode?
It is to be noted that the Hynix ram only operates at 2400 MHz on my bios.
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07-15-2019 07:16 AM - edited 07-15-2019 09:55 AM
Hi:
No they will not.
In order for memory to run in DDR mode, you have to install it in matching capacities, so 4 + 8 will run in SDR mode.
For DDR, you need 4 + 4 or 8 + 8.
Get the 8, and when you can afford it, remove and replace the 4 GB chip with an 8 GB chip so the memory will run in DDR mode.
07-15-2019 07:16 AM - edited 07-15-2019 09:55 AM
Hi:
No they will not.
In order for memory to run in DDR mode, you have to install it in matching capacities, so 4 + 8 will run in SDR mode.
For DDR, you need 4 + 4 or 8 + 8.
Get the 8, and when you can afford it, remove and replace the 4 GB chip with an 8 GB chip so the memory will run in DDR mode.
07-15-2019 07:49 AM
But I thought 8+4 combo will work! I already ordered the crucial 8gb RAM on Amazon as it was on sale for prime day. I saw on some forums that 8+4 combo works, but in a slower pace. So, should I cancel my order an buy a 4 GB variant? Will that be better in performance?
07-15-2019 08:37 AM
It's hard to say if 2 x 4 GB running in DDR mode will perform better than 8 + 4 GB running in SDR mode.
With the 8 GB setup the memory is optimized for performance, but with 8 + 4 GB you have more memory.
I would not cx the order. I would do what I suggested earlier.
Live with the 12 GB for now, and then upgrade to 16 GB in DDR mode by removing the 4 GB chip and replacing it with the 8 GB chip.
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