Just hours after our review round-up of the new GeForce GTX 680 graphics card yesterday, a Dutch site has managed to test multiple cards in different (but invariably exorbitant) SLI modes. One of the strange things we learned during our hands-on was that SLI is complicated by NVIDIA's GPU Boost technology, which causes individual cards in the same chassis to run at different clock speeds depending on their load and temperature. Fortunately, Hardware.info reports no problems with SLI whatsoever, but it also concludes that the GTX 680 doesn't scale quite as
