GeForce GTX 660 2-way SLI

GeForce GTX 660 2-way SLI

In this chapter we'll be showing you a thing or two with the GeForce GTX 660 in SLI mode. Actually we'll demonstrate single mode performance and 2-way SLI. To be able to do this we have used the custom cards and clocked them back to reference frequencies.

So the performance demonstrated is based on reference performance. Should you purchase two custom AIC cards, then your performance could be up-to 10% higher. Considering the GeForce GTX 660 is a mid-range product we'll be looking at 2-way SLI from a single monitor point of view, so ideally 1920x1200 or 2560x1440/1600 is the monitor you have to be able to compare to.

As you can see you are able to mix brands, we clocked them each individually at a 980 MHz reference frequency.

Mixing brands .. it's not a very sexy thang' to look at but hey it works.

What is SLI ? Both NVIDIA's SLI and AMD's ATI Crossfire allow you to combine/add a second or even third similar generation graphics card (or add in more GPUs) to the one you already have in your PC. This way you effectively try to double, triple or even quadruple your raw rendering gaming performance (in theory). The more GPUs, the worse the scaling becomes though, two GPUs in most scenarios, is ideal.

Once we seat the similar graphics cards on the carefully selected motherboard we just bridge them together, with a supplied Crossfire connector or, in NVIDIA's case, an SLI connector. Then install/update the drivers, after which most games can take advantage of the extra horsepower we just added into the system.