I have 2 Radeon HD 7850's in CF one is PCI Express 2.0 x16 slot (the main one) another is only PCI Express 2.0 in x4 mode. I know it decreases performance compared to a MB with x16/x8 or x16/x16 so percentage wise (in gaming) how much would it affect my FPS 10% 20%? Because It's still better using both cards rather than one card even though I'm in X4 mode (I hope) and I'd like to keep my setup but if it's like 50% decrease in FPS using x4 mode than x16 for the second slot I mind as well sell both GPUs and get a single one. If it's only 10% decrease in FPS because of the x4 mode however, that's not a big concern to me because it still functions at least 90%
Motherboard: Asus P8Z68-V LE
Processor: Intel Core i7 2600k OC 4.3GHz
Motherboard: Asus P8Z68-V LE
Processor: Intel Core i7 2600k OC 4.3GHz