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Sounds too hard I will get an ATi Radeon HD2600 XT256MB Graphic card and let you know how it goes.
 
I have a 5770 PC version unflashed with 2 DVI ports and it works fine in my 1,1 and 3,1. You can pick them up for £30-35 on eBay. Not worth getting the Mac version as that's almost the same price as a GTX 680 PC version which is a better card and can be flashed by yourself easily (search this forum for info).
 
Got a refurbished ATI 2600 Graphics card on Ebay installed into 3.1 and problems went Bye bye!:) I'd like to thank all you who contributed here and helped me out with this issue. Thanks so much you guys RULE!;):D
 
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