No, not at all. You'll be fine. on both the 775 and x58 boards the graphics bandwidth is determined by the Northbridge. So long as its PCEe 2.0 you're fine, I wouldn't run it in a 1.0 slot because that card pushes alot of data. But because you've got that q9650 odds are your board is fine.
Im not sure to be honest.. it doesn't really say if its 2.0 or not.. the model is G31MX