Gigabyte GTX 660 OC Video Card Review

There are six screws holding the Windforce cooler in place making it rather easy to remove.  With the cooler removed you can clearly see the tiny GTX 660 GPU surrounded by memory chips in the typical ring configuration.  

As was mentioned before the PWM cooler is physically attached to the Windforce heatsink allowing the PWM to take advantage of the large heatpipe arrays.  You will find the PWM located near the PCI Express power connector and is comprised of a simple 4 phase mosfet with screw holes on each side to ensure a good connection with the cooler.

We all know that cooling performance is dictated by the power of the GPU and size of the heatsink.  The Gigabyte GV-660OC-2GD comes with a smaller version of the standard WIndforce cooler with two distinct parts and four individual heatpipes.  This is different than the cooler found on the GTX 660Ti and in some ways, is better.

The primary GPU contact surface is the only one to make direct contact with the heatpipes.  You will see that the PWM cooler is part of the fin array and works like a standard thin fin aircooler from "back in the day".

A single 6pin PCI Express power connections is required to run the GTX 660 however according to NVidia it isn't required for a 115w TDP GPU.  The reason you see it is to allow for board makers to release custom SKUs and allow for factory overclocking like what we have from Gigabyte.