I have an Antec Sonata case with the 380W TruePower power supply. The 120mm chassis fan began having trouble starting on power up, so I replaced it with a Kingwin CFBL-012LB. The original chassis fan didn't have any kind of connection directly to the ASUS P4P800-E Deluxe motherboard - only to the 12V molex connectors from the power supply labeled "Fan Only" (4 conductors). The replacement fan's molex connector only has 2 conductors (pwr & gnd), but it has a separate connector to connect to the motherboard's "CH FAN" connector.
When I plugged the new fan into the PS's "FAN ONLY" 12V connector and the motherboard's "CH FAN" connector, the chassis fan (rated to run at 950 RPM - I'm not sure if it varies at all) seemed to run fine, but the power supply fan only runs at high speed (about 2700 rpm). Prior to this I had only heard the power supply fan go high for short periods of time when the PS got warm - and then it would throttle right back down.
When I unplugged the chassis fan's connection to the motherboard's "CH FAN" connector, the power supply seems to run at normal speed again, but this time the fan of the video card (????) kicks into high gear.
I'm not sure what the problem is - anybody care to guess? Is there a certain chassis fan I'm supposed to use as a replacement or do I just have things connected incorrectly?
Thanks!
When I plugged the new fan into the PS's "FAN ONLY" 12V connector and the motherboard's "CH FAN" connector, the chassis fan (rated to run at 950 RPM - I'm not sure if it varies at all) seemed to run fine, but the power supply fan only runs at high speed (about 2700 rpm). Prior to this I had only heard the power supply fan go high for short periods of time when the PS got warm - and then it would throttle right back down.
When I unplugged the chassis fan's connection to the motherboard's "CH FAN" connector, the power supply seems to run at normal speed again, but this time the fan of the video card (????) kicks into high gear.
I'm not sure what the problem is - anybody care to guess? Is there a certain chassis fan I'm supposed to use as a replacement or do I just have things connected incorrectly?
Thanks!