Today, I installed a new power supply and attempted to install a Geforce GTX 660 graphics card. Now the computer is running fine with the new power supply but when I install the card I plug the VGA into the adapter that came with the card and plug it in the monitor isn't detecting the card. I don't know if it's the card or what because I was running this computer http://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/kb/docDisplay/?sp4ts.oid=5295962&spf_p.tpst=kbDocDisplay&spf_p.prp_kbDocDisplay=wsrp-navigationalState%3DdocId%253Demr_na-c03499587-9%257CdocLocale%253D%257CcalledBy%253D&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken any ideas on how to fix this?