Thanks for the replies,
Crezzlin - I have tried 2 different DVI cables with no difference, and I tried a VGA one aswell, I did get different pixel clocks and hz/khz refresh rates in my monitor information but it made no difference =( This was a shame because I was convinced it was a refresh rate issue for a long time..
Getcarter - I didnt have my rig overclocked when I installed XP or 7.. I had my 720 at stock 2.8ghz and ram at stock timings and clock. =(
El Commi - When all this first started I thought it was a heat issue too, and replaced the stock cooler on my CPU with an Arctic Cooling Freezer 7 Pro Rev 2. My temps are fine, idles in the 20s and maxing out never goes over 60.. The last time I reinstalled XP (last week), I took out all LAN connections and literally just had the keyboard, mouse and graphics card. From the first boot I put on the latest drivers, tried a game and the stutter was there. No internet. No LAN.
In the past this set up has worked without stutter in XP before, and it was when I went to windows 7 a couple of months back that the problem became really apparent, which was why i was going on about it being a 7 problem. Since then I have got so fed up that I went back to XP, and yet I still have this stuttering. I think its a driver issue too, I really wish I could find some alternative drivers. I have all the latest ones from the gigabyte website (for XP and 7) and it hasen't helped so far.
Xnytramx - Heh well I've spent like 200 quid so far on this in 2 months, not as a planned upgrade but just replacing parts to fix the problem, admittedly I did RMA the graphics card though (that was just too much money for little change..) Heres a list:
Stock heat sink cooler -> Arctic Cooling Freezer 7 Pro Rev 2
Hiper 480w psu -> Cosair GS 600w
2gb Kingston DDR3 C9 -> 8gb Corsair Vengeance DDR3 C9
Seagate 500gb HDD -> Samsung Spinpoint HDD F3 1tb
Geforce 460 GTX 768mb -> Radeon 5850 1gb (RMA)
Mick-1965 - Its PCI-E x16 running at 200mhz I think off the top of my head.
