In the past we have reviewed the CNPS9500 LED cpu cooler from Zalman that has superb performance. It had a universal clip so you could mount it on pratically all sockets. Zalman has now released a AT version if this cooler that is specially designed for socket 775 only. A quick look at the specifications show that the fan runs at a lower rpm and that is missing some accessories. We will test this cpu cooler vs the LED version to see if there is actually any difference on these.