SLI optimizer? That a separate tweeker tool or something that came with your MSI stuff? I assume it's used to force every game software to utilize the SLI setup? Anyplace I can download that from? Just picked G3 up yesterday and have had a couple problems with the system locking up on me but I think it's because the heatsink/fan on the chipset controller for the motherboard is failing and it's getting too hot. Asus told me to contact the merchant I got it from... They didn't put a faulty fan on there, why should I contact them? Don't think I'll buy another Asus board if that's how they are going to treat me.