Re: Consolidated Litecoin Mining Guide for 5xxx, 6xxx, and 7xxx GPUs

8gb of ram is more than enough, cgminer barely uses any RAM. The problem is probably your cgminer configuration; you should post it.

my cgminer input is:

cgminer --scrypt -o http://coinotron.com:8322 -u user -p passwd --shaders 1600 -I 13