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I own a Raspberry PI model B with 512MB of RAM. I am not running any graphical application on it. It just run a few services and when I need to administer it I do that via SSH.

I see that my /boot/config.txt file contains the following line

gpu_mem_512=316

but since I am not using anything graphical at all it feels a bit of a waste. At the moment my system is not memory hungry, but I don't foresee I'm going to attach a screen to it so I'd like to have a memory split optimised for my use.

What is the optimal split for my situation?

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the least you may allocate for GPU is 16MB, it works for me and should work for you just fine. put the following to /boot/config.txt and see:

gpu_mem=16
  • Just a note to complete your answer: gpu_mem sets the gpu memory for either 256M or 512M Pi's. gpu_mem_256 and gpu_mem_512 override this if running respectively on a 256M or on a 512M Pi. – mariosangiorgio Oct 19 '14 at 7:34
  • I'm using this for headless server too and it's perfectly fine. – kotrfa Oct 20 '14 at 20:14

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