The graphic card is Asus EAH4350/Silent/DI/1Gb
It does have compatibility issues in that the driver does not load but a generic one does, It is supposed to be compatible to crossfire but I do not use this and have not fitted any of the extra Gigabyte connectors that were supplier with the board (MB).
If this is 2008R2 I got mine working by going to amd.com and telling it to find drivers and it loaded in the appropriate driver and I got full 1080P resolution. I have the HD 4200 built-in graphics.
What will I see if the card does slow down to x8 speed ?
Probably nothing. It may affect 3d games with high end cards in SLI/crossfire but not much (maybe 10 to 20 per cent)
Will it still run thre monitors HDMi, DVI & Dsub connected all at once?
If it does now, then it should be fine.
If the revo drive is fussy I stil favour a new build so the original question s still valid if no Graphic card required what board would best suit the Intel I7-3770K chip? and what chipset ?
Any Z7x board should be fine, they support that chip at release day. The 6X series should work if BIOS is updated. That CPU has HD4000 graphics built-in. Not sure it supports 3 monitors. I know it supports two. Your current video card will work on the board just fine.
The revo drive shouldn't be too much of an issue. It's mostly the motherboard auto configuring the addresses for it. You may want to check the OCZ forums and see what they say. Search for your board and see what revo works or common issues.
-=Mark=-