![]() The missing volt made me suspect that the unit also limits the start up current to the fan, and it would be prudent to keep it on a 12v feed. The Fan Mate 2 fan speed controller has 12v input and a variable output of 5V (silent mode) to 11V (full speed). This was sufficient to insert the card in the AGP slot and screw in the end plate fixing screw. To reduce the height of the 2 thumb screws, I put the metal shaft in a 12v drill and used abrasive paper on a metal strip on the plastic end until the central hole became visible in the metal shaft, around 10 minutes per screw. ![]() The fan unit is held onto the graphics card with 2 black plastic thumb screws (4 included in the box) which unfortunately projected sufficiently from the back of the card to prevent the card from being inserted in the AGP slot. Solder joints and the cut end of yellow wire were then coated with rapid setting epoxy (unable to find any suitable sleaving) The plug and some of the wire was cut off the original ATI fan and soldered to the corresponding wires on the Fan Mate power in cable after first cutting off the Zalman plug. The power input lead has 3 wires, the obvious red and black plus a yellow sensor wire, not needed on a Mac. The VF900-CU comes with the "Fan Mate 2" fan speed controller, the wiring for which was designed for a PC and needs to be modified for use in a Mac. ( it's been a popular choice with other Mac cards also.) In "quiet" mode (5V) it is inaudible even with your head in the case and at this setting it still cools better that some aftermarket units at full speed (12V). My PC expert brother recommended a Zalman replacement unit, and after some research on the web I went for the VF900-CU model. This fan gets my vote as the most annoyingly noisy cooling fan ever mounted on a production graphics card! However the noise the standard fan made, a high pitched whine, was impossible to put up with. I eventually won an ATI 9800 Pro Mac Special Edition with 256MB RAM (). Having got used to high end graphics cards on the Macs at work, I started putting reasonable bids on various AGP x8 graphics cards for use in my home Dual 2Ghz G5, when they came up on ebay. ![]() Zalman VF900 CU Cooler Install on Mac 9800 SE Recent Updates | Mac Upgrades/Repairs | Storage | Video/Displays | Audio/Home Theater/TVs | Tips/OS Updates/WiFi | Home Zalman VF900 CU Cooler Install on Mac Radeon 9800
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