Most warrantys are covered by the manufacturer, Over the years i have never had stuff die out on me that i purchased, But i built a PC for a friend and the graphics card died after 2 months, contacted the manufacturer, a replacement was here within 2 days, Most major computer part brands cover defect warrantys, but if you break something on accident you are screwed, so just don't be stupid! good point tho, pc building is not for everyone!