This Geforce 9400 GT is made by Zotac with the model number: "ZT-94TEK2P-FSR" and is based on a card from the Nvidia Geforce 9000 series of graphics cards. The video card has 1024MB (1GB) of DDR2 memory running at a speed of 400MHz and a core with a clock speed of 550MHz. This graphics card uses a fan to cool the components. SLI is Nvidias technology used to connect multiple graphics cards on one system. The Geforce 9400 GT has support for 1 way SLI. This is a single slot video card and requires a 300 watt PSU. This graphics card can use any of the following ports to connect to a monitor: 1 x DVI. 1 x VGA. 1 x S Video.