Zalman CNPS9500 CPU Fan

[dr0be]

I've done some searching on the forums and through a bunch of reviews for the fan but couldn't find an answer to my question. Anyways...

I was reading through reviews for the 9500 and ALOT of people were saying that even though the 9500 is compatible with LGA775 cpu's, the mobos that run LGA775 have 4-pin connectors for the CPU fan whereas the 9500 is only 3-pin. People say that everytime they boot up the OS pops up a message saying no CPU fan detected press f1 to continue and it looks like most LGA775 users are saying that in these user reviews.

Is there a solution to this or do they have to deal with that? Can you turn the message off?

 

[dr0be]

Bump

 

[nZone]

Not true. The 3 pin always come with fan speed monitor. Most MB BIOS has fan speed alert detector. They should either increase the fan RPM in the alert setting or disabled this alert in the BIOS. In case of the 4-pins connector, the 4th pin doesn't do anything else other than regulating the fan power.

 

[dr0be]

Originally posted by: nZone
Not true. The 3 pin always come with fan speed monitor. Most MB BIOS has fan speed alert detector. They should either increase the fan RPM in the alert setting or disabled this alert in the BIOS. In case of the 4-pins connector, the 4th pin doesn't do anything else other than regulating the fan power.

Ah. So without the 4th pin it cant tell how fast the fan is going, hence the alert?

 

[zagood]

re-read what he said. The 4th pin regulates the speed/power, doesn't report the RPM's. The problem with the 9500 and some other heatsink fans is that they spin too slowly for the BIOS to be able to read it. You need to either increase the fan speed or disable the fan speed monitoring alert in BIOS.

-z

 

[NXIL]

Dear Dr O,

there are multiple versions of the 9500 (and 9700), some with the 4 pin fan header, and some with three pins and a "fan mate" (sounds disturbing when you think about it) controller.

http://www.newegg.com/Product/...8004%2CN82E16835118020

9500, no LEDs, 4 pins:

http://www.newegg.com/Product/...x?Item=N82E16835118003

Note on this one: "6. Maintains minimum RPM even when Duty signal supplied by M/B is below 30%."

9500 AM2, three pins, "fan mate":

http://www.newegg.com/Product/...x?Item=N82E16835118004

9500 LED, 3 pins, fan mate:

http://www.newegg.com/Product/...x?Item=N82E16835118004

9700 LED, 3 pins, fan mate:

http://www.newegg.com/Product/...x?Item=N82E16835118019

9700NT, 4 pins:

http://www.newegg.com/Product/...x?Item=N82E16835118020

I use a 9500 AT on a socket 775 board with a P4 640--the mounting mechanism for this is way better than the stock arrangement (IMHO); the four pin fan connector works great--it runs essentially silently, I never hear it--and no problems that I have ever seen at start up with RPMs too low, etc, and I do have fan alarms and heat alarms set in the BIOS.

Also, as I recall, this keeps the CPU about 20-30 degrees F (really, I was surprised too) cooler than the stock heat sink and fan.

HTH

NXIL