Graphics Card Fan Speed Control Software Regulate The

Since there is not a fan header on the card itself (it was originally passively cooled), Im using the fan mate that came with it to regulate fan speed.

Ive been looking at some of the latest video card offerings (some 4670s and 4850s) and noticed that the fan headers on them vary.

The 4670s look like they have two-pin fan connectors, while some of the 4850s have three and four-pin fan headers.

Graphics Card Fan Speed Control Software Regulate The

Do these fans just run at a constant speed Are the four-pin headers similar to PWM headers Do the cards drivers or other software regulate the fans speed Im not necessarily looking to upgrade cards right now - I really dont have any reason to.

Tho0ugh I am wondering if I were to get a card with a three or four pin header, would I be able to ditch the fan mate in favor of some sort of automatic control if I were to replace the new cards stock cooling with my vf900.

The fan mate controller is simply a linear voltage regulator with a pot to adjust the output voltage.

As such, you probably wont be able to connectcontrol the Zalman fan with a video cards fan controller.

All the video cards (that Ive seen, anyway) that offer speed control do so with a PWM drive circuit, rather than with variable DC.

How is the VF900 on this 4850 controlled I see what looks like a PWM header with some sort of adapter.

From the looks of it, I dont believe theyre doing any speed control at all.

Theyve taken the standard powergroundsense lines from the 4-pin connector on the video card and made an adapter to fit the Zalman cable.