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June 17th, 2016 06:00

Precision M6400 Memory

Hey everybody,

Seeking some guidance. Everything I've read states the Precision M6400 can support a max of 16GB of RAM. The laptop I'm working with had 4 GB installed. 2 sticks of 2 GB each. The laptop works with the original memory, but we want to upgrade to the MAX. It also has the latest BIOS of A13.

We ordered 2 Crucial 8GB kits (CT2KIT51264BF160B). The Crucial web site states these are compatible. Each kit contains 2 sticks of 4GB each. These should give us the MAX of 16 GB.

I can only get the laptop to boot with 8 GB. With all 4 identical sticks installed I get the blinking caps lock (Memory error). All of the memory appears functional as I've tested all 4 sticks, but just can't get more than 2 sticks to work at any time. I've also tried using two of the new sticks with the old ones in the proper slots, but no luck. 

Any suggestions? Thanks!

4 Operator

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2K Posts

June 17th, 2016 18:00

Hi GORDON ADAMS,

What is the current OS installed on the system? Do all the 4 slots work fine? The 8GB - 2X4GB modules installed - are they on the bottom slots or the slots underneath the keyboard?

I have checked that the parts are indeed compatible with the machine. And moreover, the memory as you state, works fine, but to a limit of 8GB.

Write me a private conversation with the service tag and your contact details(Name and Email) for case records and I shall review this with our teams.

Keep us updated.

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