I bought this psu http://www.newegg.com/Product/Product.asp?Item=N82E16817163017#DetailSpecs for my new video card. It's 20 pin I totally forgot to look up the diffrence between 20 pin and 24 pin my psu is like maybe 3-4 yrs old its 300 watts. Think its 20 pins? The PSU is delivered in 2 days and I don't want it to have to be a 24 pin? If I took off my case right now can someone help me see if its a 20 pin or if I need to cancel and get a 24 pin psu instead? Thanks