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1. Thank you for sharing your detailed observations. It’s common for certain laptops, especially gaming or high-performance models like the Acer Predator series, to have configurable or hidden RAM slots. Here are some points to consider:

   • Check the Laptop’s Service Manual or Official Specs: Often, the manual or official documentation will specify the actual number of accessible RAM slots. Acer’s specifications may sometimes list total slots, including those not user-accessible.
   • Hardware Inspection: You mentioned only physically seeing two slots; some systems hide additional memory slots under the keyboard or other panels. Consider carefully inspecting or removing the back cover, if possible, following manufacturer guidelines.
   • Software Reporting Discrepancies: Tools like CPU-Z sometimes misreport or list logical slots based on firmware configurations. The actual physical slot count may be less than what software suggests.
   • Integrated or Onboard Memory: Some models could use onboard or soldered RAM modules, which appear as slots in software but are not physically accessible or upgradeable.
   • Update BIOS/Firmware: Ensure your BIOS is up-to-date, as sometimes hardware enumeration improves with newer firmware updates.

   If you are comfortable, you may consider opening the back panel following official repair

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