Well I googled GTS 240 and found out that no one sells the GTS 240 you can buy a GT 240 and they sell GTS 250's but no GTS240's. I don't know if you could contact Dell and see if they would sell just a video card. Other than that Newegg and Tigerdirest both have GT 240's. So other than trying Dell looks like your out of luck, Sorry Fabe