![How to fix "GB usable" RAM problem under 64-bit Windows (set PCI-E Graphics Card as default in BIOS) - YouTube How to fix "GB usable" RAM problem under 64-bit Windows (set PCI-E Graphics Card as default in BIOS) - YouTube](https://i.ytimg.com/vi/4HbNiCeTU8s/sddefault.jpg)
How to fix "GB usable" RAM problem under 64-bit Windows (set PCI-E Graphics Card as default in BIOS) - YouTube
![16gb RAM installed but only half is usable. Please help. - CPUs, Motherboards, and Memory - Linus Tech Tips 16gb RAM installed but only half is usable. Please help. - CPUs, Motherboards, and Memory - Linus Tech Tips](https://linustechtips.com/uploads/monthly_2020_12/31502414_WhatsAppImage2020-12-04at22_08_34.jpg.aff60190666753c94e51ec9b0cec9c05.jpg)
16gb RAM installed but only half is usable. Please help. - CPUs, Motherboards, and Memory - Linus Tech Tips
![Aspire A315-21 Device name Processor AMD A4-9120e RADEON R3 How many RAM 12/16gb RAM upgradable? — Acer Community Aspire A315-21 Device name Processor AMD A4-9120e RADEON R3 How many RAM 12/16gb RAM upgradable? — Acer Community](https://us.v-cdn.net/6029997/uploads/B8XQ2NBT9I0E/img-20221229-214147.jpg)
Aspire A315-21 Device name Processor AMD A4-9120e RADEON R3 How many RAM 12/16gb RAM upgradable? — Acer Community
![I have 16gb of RAM installed, but it says that only 13.9gb are usable. Can someone explain me why and how to fix it? : r/pcmasterrace I have 16gb of RAM installed, but it says that only 13.9gb are usable. Can someone explain me why and how to fix it? : r/pcmasterrace](https://preview.redd.it/32tbn0gmh9k61.jpg?auto=webp&s=7ee4f3f2081e63b4f76ba89ac0451acf085b884e)