SLI motherboards do not cost $300. The ASUS A8N was no wh ere near 300 when it first came out. Besides now it is around $179. SLI increases performance at HIGHER resolution. I don't know why everbody thinks SLI is for 1024x768 resolution. When is at such a low resolution, the processor is bottlenecking the two video cards, which is why there is no performance gain. SLI was made for the people who want to enjoy less latency at higher resolutions with antitrospic filtering, etc.