If full-speed Blu-Ray playback is your thing, then the XFX Radeon HD4550 is your card. Offering 1GB of memory size paired with DDR2 memory, this low-profile card fits in almost any case or motherboard designed to have a PCI Express video card in it. It also supports ATI Stream Technology, giving your system a significant boost by offloading tasks usually sent to your CPU to your GPU.