I wonder if there are multiple s400-ca's with varying specs. v=F9v1SOeng Zw I don't know if the links below will lead you to the information I see. Your S400CA System Specs Memory: DDR3 PC3-12800 Memory Type: DDR3 PC3-12800, DDR3 (non-ECC) Maximum Memory: 8GB Currently Installed Memory: 4GB Total Memory Slots: 1 Available Memory Slots: 0 Advised RAM: 4GB DDR3 PC3-12800 • CL=11 • Unbuffered • NON-ECC • DDR3-1600 • 1.35V • • Part #: CT3679802 The only problem I can see to explain the situation is that Newegg says the ram I bought is 1.5v while the advised crucial ram has 1.35v.
When I ran the test, I had the unrecognized 4gb ram still installed in the laptop. I know that changing ram voltage on desktops is really easy in the bios, but I did not see a seting in this laptop's bios.
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