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I suspect that you have problems with the graphics driver. I have a computer with the same motherboard (with a slightly slower CPU) and the nvidia graphic chip
Code:
*-display
description: VGA compatible controller
product: C68 [GeForce 7050 PV / nForce 630a]
as shown by That chip work well with the still going strong version Ubuntu 12.04.5 LTS. Probably Xubuntu or LXLE will be much more responsive than standard Ubuntu or Kubuntu. It is the same engine under the hood, and all those versions will be supported until April 2017 (except Xubuntu, which will be supported only until April 2015).
I use the nvidia proprietary driver version 304.88
You might succeed better using the boot option nomodeset, and then install the nvidia proprietary driver. See this link
https://help.ubuntu.com/community/BootOptions
It might even work via nomodeset, to get version 14.04.1 LTS working.
Good luck and come back with questions, if this first tip is not enough!
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