Hello everyone, I currently have a single GTX 660 SC and was interested in adding another. I have the M5a99X evo r2.0 mobo and it has PCIe 2.0 x16. If i were to add another card the PCI slots would be running at 8x each. Would that bottleneck my performance?
The PCI x8 lane is definitely going to slow down the performance. I would recommend selling your current GPU and getting into a single card like a 7970 or 7950.