Trusted Reviews reviewed the Leadtek WinFast 7600 GS and HIS X1600 XT IceQ Turbo

The 7600 GS is very similar to the 7600 GT, not only to look at but in terms of specifications as well. The core is literally identical, with 12 pixel shaders, eight pixel output engines and five vertex shaders. This is all built on a 90 micron process, keeping heat down to a minimum. This and a reduction in core speed to 400MHz (over the 560MHz on a 7600 GT) means they can actually make this card passively cooled. It is worth noting that
this is not a Leadtek specific thing =96 the reference design for a 7600 GS
is passive, so unless some manufacturer decides to put a fan on its cards
to make them "better", all of the 7600 GS cards should be this way.
This is great, as silent cards usually come at a premium.

Leadtek WinFast 7600 GS vs HIS X1600 XT IceQ Turbo