I've had the Sapphire 5770 Juniper, i.e. the closed exhaust fan box for about 3 months now. I've an older system with the G31 chipset and an Intel E6500. So far, this card has worked well for me. Idles at about 45 C and about 65 C when gaming. If you are not playing high frame rate FPS's the card will work well for you. If you are, think about at least a 5830.