[Trisquel-users] Advice for Setting up GNU/Linux on a Second-Hand Gaming Rig

[strypey]

Hi everyone, I recently bought a second-hand desktop PC off a friend, in a  
CoolerMaster case. He used it mainly for playing proprietary games (World of  
Warcraft on Windows), and I'm keen to see if I can set it up to play some  
libre games using GNU/Linux. So far I've managed to hook it up to a digital  
TV we have here (using DVI > HDMI) and boot into Trisquel Belenos by using an  
old liveCD I have, and choosing CD-ROM from the boot menu. So far, so good,  
but there are a few things the community might be able to advise me about.

* is Trisquel the best GNU/Linux distro for gaming purposes, or is there  
another FSF-endorsed distro that is better for this purpose?

* I have Trisquel Belenos on two liveUSB sticks (one default and one mini),  
which I have successfully used to install to my laptops, but I can't boot the  
desktop from either of them. I have tried going to the boot menu and choosing  
both all 4 USB options (USB-FDD, USB-ZIP, USB-CDROM and USB-HDD) but no luck.
- The case has 4 USB sockets on the front, and 10 on the back, could it be  
that booting only works from some of them, not others?
- I have a USB mouse and keyboard plugged in. Could this be preventing the  
liveUSB being detected?

* uname -m, run from a terminal inside the LiveCD, tells me that my system is  
"i686". I just want to check that this is checking my hardware, not the Linux  
kernel running off the CD. In other words, if I was using a liveCD made from  
a 64-bit version of Trisquel, would I get different results?

* any other advice?

I am now attempting to install Toutatis off the liveCD. I will post the full  
lspci output of the PC soon.