I have an old Dell Dimension 8400 that was given to my kids with no hard drive. I have since installed a hard drive and would like to know which OS is the best and most compatible. It does have a TV tuner card, but I am not sure the model as I have no documentation to go with the computer. I assume it is all stock basic parts. It is only 32 bits on the CPU as I did try to install Ubuntu 13.10 x64 and it says it is not capable of running 64 bit OS on the CPU.

Edit - I was able to get the live version of Ubuntu 8.04 to run on it. But I would like a newer version... Any input as far as OSes known to work with this model would be awesome.