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I installed 4 Os's(Ubuntu 13.04,Ubuntu 13.10,Windows 8,Windows 8.1 in logical partition) on my HDD.

Does this configuration may affect my RAM in some other ways?

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up vote 2 down vote accepted

No, the RAM is all given to the active operating system unless you are running another operating system simultaneously by creating a virtual machine.

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Not at all, your 4 os are on your HDD, so you will choose one on the boot menu, so the others won't be solicited by anyway on the computer.

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RAM is temporary memory which is cleared when your computer is totally off. If you boot into one OS, the OS will only use the RAM and not other OS-es since you are not booting into it and it is not running.

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