100% CPU spikes running cubase 8

So, I got home, enabled the onboard i7 graphics and ripped out my Leadtek Quadra 600 graphics card.

Problem solved.

I ran C8 pretty hard and all was fine…

SO, does anyone know of any incompatibility with NVIDIA QUADRA series graphics drivers? I have had no other problems with card or the drivers in graphics applications (Lightroom, Lightworks and watching digital TV/internet), so I don’t think it is actually broken.

While the onboard graphics works, it is not a solution (just a work around) so I need to know whether I should fix it with and different version of the drivers or by moving to a different type of card, or whether the card is, in fact, faulty and I need to replace it. Any similar experience or insight may help direct me in this.