This is for the 7″ LED display I bought off of ebay. It is super crisp, but the resolution is a no-standard size. Once the OS is up you need to configure these settings from a different display. Once configured, reboot.
More information about the display and support can be found here:
max_usb_current=1 hdmi_group=2 hdmi_mode=1 hdmi_mode=87 hdmi_cvt 1024 600 60 6 0 0 0