So this is my computer. http://www.newegg.com/Product/Product.aspx?Item=N82E16883229619&cm_re=cyberpowerpc-_-83-229-619-_-Product . and im looking to upgrade to a amd R9 270x sapphire vapor oc edition. And i was wondering if my psu is enough for it and if this GPU is my best bet for an upgrade for 180$. I appreciate help