For these servers, it will be a hit and miss testing cards that may work in them. These were custom built servers for a specific client and when they were finished with them,  put them out on the market.   There are no upgrades, bios updates, firmware updates, or support for these servers.    You can read through the forums and find what has worked and not worked for others that have purchased these servers.  Regards,  
I just bought 2 dell F1C systems. I am looking for a riser card that will let me plug in a pci-x ethernet card. Problem is I can't find one that the slots line up for that fits in a 1u configuration. I found a riser for an R5400, but it's a 2u, and my servers are 1u.  Can any one provide any information that might help me out on this? The riser slot looks like this: [URL]
Dell F1C Riser