Nvidia Quadro NVS 55 64MB DDR SDRAM 256-bit PCI graphics 406272-001 Nvidia Quadro NVS 55 (NV34) 256-bit PCI graphics controller - 64MB DDR SDRAM - 250 MHz engine clock (Low profile form factor with bracket) Compatible Models:HP Compaq dc5100 Microtower PC HP Compaq dc5100 Small Form Factor PC HP Compaq dc5700 Base Model Small Form Factor PC HP Compaq dc5700 Microtower PC HP Compaq dc5700 Small Form Factor PC NVDA Qdr NVS 55 PCI 64MB DVI LP Card NVDA Qdr NVS 55 PCI 64Mb DVI w/TV-Out Ca NVDIA Quadro NVS 55 PCI Graphics Card