I just biult my computer about 3 weeks ago and when i would play call of duty united offence my computer would randomly go a to a blue screen. so i ran memtest-86 v3.2 and and like a whole bunch of errors came up. up to about 512mbs which i do know what the means but it weas under failing address. I have 1gb of ddr 400 in my computer two 512mb sticks does that mean one stick is bad? If so is there a way to fix it or am i going to have to rack out more money to get another stick.