Quote Originally Posted by SKYMTL View Post
It depends. Basically, the second you go over 300W you're no longer backwards-compatible with PCI-E 1.x which can only deliver 75W through the PCI-E slot while PCI-E 2.0 can deliver up to 150W. So, if you make a 300W card you have one of two options: add two 8-pin PCI-E connectors or risk alienating everyone with PCI-E 1.x mobos in addition to confusing the heck out of potential customers who don't know any better.
not really, it's easy to design your card in a way that it pulls 75w from the slot and the rest, however much that may be, from the power connectors