I just bought a HP NC360T network card and installed into N54L also disable to onboard NIC.
I installed the latest DSM 6.2.1-23824 Update 6 with Jun loader 1.03b seem it successful upgrade, but I relies that during the login seem very unresponsive and in the DSM main menu it just left few application only.
Not only that, the control panel aren't able to open and it keep buffing.