1. Set your Intel based computer with PCI express (PCI-E / PCIe) video card to use less than 4GB RAM (1GB or 2GB or 3GB)

2. Install linux and login as root

3. Find "blacklist" file located somewhere in "/etc" folder. If you have file named "modprobe.conf.local" in "/etc" folder /etc/modprobe.conf.local use it, otherwise use /etc/modprobe.d/blacklist

4. Open with text editor "modprobe.conf.local" file or "blacklist" file respectively

5. Write this line at the end of the file: blacklist intel_agp

6. Save changes by clicking floppy disk icon or from menu click File then Save (not save as)

7. Reboot linux

8. Set your Intel based computer with PCI express (PCI-E / PCIe) video card to use all available RAM (4GB or more)

Now you can use linux with all RAM available to Your machine