LOL, the smashing of glass would have added to the effect
PC now sorted, replaced A7V8X-X with an Asus A7V8X-MX (basically similar, smaller form factor with on-board graphics and all is fine. Problem must lie with the graphics card IMHO?
I'll start with the other PC, and see if I can get a cheap graphics card for it...
Still find it strange that it happened on both systems but hey
you know PC's eh!?
Thanks for your help throughout tho' guys