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Post by gdawg8947 on Jul 15, 2004 3:03:24 GMT -5
Does anyone know how to get rid of the fan errors at startup? Those occur when you replace the stock Dell fans with aftermarket ones and are forced to plug them into the 4-pin molex connectors.
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Post by TRow on Jul 15, 2004 9:55:44 GMT -5
Does anyone know how to get rid of the fan errors at startup? Those occur when you replace the stock Dell fans with aftermarket ones and are forced to plug them into the 4-pin molex connectors. Press F1 ;D No but seriously, those connectors detect fan speeds at boot up, meaning the fans are guardbanded in the bios to detect failure at certain preset parameters. Possibly guardbanded to detect voltage/amp/watt's at boot(theory). Given your NEW fan specs, and the fact your XPS is cooler than ever before....you'll just have to deal with it........ or engineer a way to fool the Bios, and still maintain the integrity and stability of the Mobo/PSU. Or Just Press F1, which is about 10 seconds after boot, and Clear your Bios Event Log every couple weeks. Try this link for some more info: xpsmodz.proboards33.com/index.cgi?board=mods&action=display&thread=1088657606T.RoW
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Post by gdawg8947 on Jul 15, 2004 11:54:55 GMT -5
Haha. Just wanted to see if there was an alternative to pushing F1 all the time at startup.
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Post by crusier on Jul 15, 2004 12:07:12 GMT -5
If the tach signal is compatable you can plug that wire and ground into the connector on the motherboard. There are signal/power split cables available. You would have to convert to the Dell connector for the signals.
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buzsaw
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Post by buzsaw on Jul 16, 2004 8:59:59 GMT -5
Compatible how, startup volts, max cfm?
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Post by crusier on Jul 16, 2004 11:26:00 GMT -5
Compatable as to the fans configuration. The rear nidecs here were wired black/ground, red/+12vdc, and yellow/tachometer. Deciphering the smbus dump generated by MBM5 and referencing it to the adm1027 docs it appears the fans are merely monitored to not go below 200rpm.
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buzsaw
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Post by buzsaw on Jul 16, 2004 11:50:44 GMT -5
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Post by crusier on Jul 16, 2004 15:51:33 GMT -5
The rear fans are almost guaranteed to have thermal sensing. As an oem fan Dell can give their own specs as to startup speed (idle) along with the ramp versus temp. They can also spec the mode the fan will function in; such as a pass/fail level or edge trigger, a tach output (along with the type of signal to be generated and the pulses generated per revolution). To determine a close match compare the nearest models to get an approximate cfm. Since Dell uses a custom fan connector that alone would require a special order and part number assignment. Use of a fan controller (most simply use a variable voltage) on the rear fans would buy you nada...zip... as the thermistor on the fan controls the speed. The thermistor is usually specified by Intel to be mounted at the hub of the fan and to trigger at 40c. That's about the only spec Intel requires to be in compliance thermally. Some fan manufacturers have the thermistor mounted internally ( in the hub on the printed circuit board therein. To use a fan controller on the rear fans would require jumpering out the thermistor which would put the fans in max max, only to be fed a varying voltage from the fan controller to control the speed of the fans. Beware that the fan controllers have power ratings which in all likelyhood would be exceeded by the rear Dell fans. To calc the watts required for a fan, multiply the voltage times the current spec'd on the fan manufacturers label. The front fan on my gen 1 had a fail signal only, rather than a tach output. In looking for a replacement fan you will also have to look at the pressure specifications! Dell seems to like designing the cooling systemfor quiet in normal loads and use the shrouds to control the airflow. In using their cooling configuration they use a controlled low volume airflow.
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buzsaw
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Post by buzsaw on Jul 16, 2004 19:01:31 GMT -5
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Post by devnull on Jul 18, 2004 18:52:32 GMT -5
Is their a way to do it without a fan controller and not get an error message? So Dell uses a 3-pin connector and so do aftermarket fans, right? So could you put the tach lead onto the mobo so it thinks taht there is a reading coming from the fan or what? You said the mobo just wants to make sure that the fan is running at 200rpm, so wouldn't this help? I suspect I dont understand the issue fully.
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Post by crusier on Jul 19, 2004 5:30:11 GMT -5
Wire the fan ground and tach to the Dell connector and plug that into the motherboard. Plug the fan ground and +12vdc into the molex. Make sure all the wires are connected right!
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buzsaw
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Post by buzsaw on Jul 19, 2004 9:01:58 GMT -5
Do you mean black/ground and red/+12vdc to molex and the yellow to the mobo. We have white wire where the yellow should be so we just have to make sure that the pin we use for the yellow is where the white wire belongs, correct?
Is it possible to connect the y/wire using only the metal fitting thats standard on all fan wires? If so should it be prevented from making contact with any of the pins next to it? This could be done by using a small piece of shrink wrap on the fitting before connecting. All this so we can leave the Dell fan connector intact for warranty purposes.
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Post by crusier on Jul 20, 2004 3:35:36 GMT -5
Shorting +12vdc to ground would vapor traces! My notes on the rear nidecs show blck=ground, red=12vdc, yellow=tach. It would be better to use the dell fan connector with the ground and tach signals, while the ground also goes to the molex along with the +12vdc, for connecting the fan to the motherboard. That would prevent any pin shorting or accidental reversals. I seem to recall a pigtail adapter mentioned as being available on the DCF about 4 months + back. A search at the dell forums might find it. The heatshrink over the pin would work, However it would be prone to disconnect or wrong pins connected. There are y cables around which allow for a fan to be connected, powered, and monitored off the motherboard while having a seperate 2 wire present to allow plugging into the motherboard to feed it's tach sensing requirements. Be sure to verify the wires and their functions! Some fans go up in smoke if the polarity is reversed, while others just sit there waiting for the right polarity.
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Post by avsforsberg21 on Jul 21, 2004 13:42:24 GMT -5
How do you clear the bios event log?
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Post by TRow on Jul 21, 2004 15:44:20 GMT -5
To clear the System Event Log: (aka Fan Failure Error Log) 1.Go into BIOS at Boot, Press F2 When Prompted. Scroll down to System Event Log(Press Enter) Highlight Clear System Event Log(Press Enter) and/or(not at all if you wish) Mark ALL Entries As Read-(Optional) ======================================= ....Disco(Line from Pulp Fiction) T.RoW
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buzsaw
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Post by buzsaw on Jul 21, 2004 15:47:28 GMT -5
Maybe that should be a sticky topic Trow lol
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Post by quantpsy on Nov 12, 2004 13:05:22 GMT -5
I have an XPS Gen 3, and recently replaced the Nidec fans with Vantec Stealths, powered off the PSU. So naturally I get the error message at startup. I want to try to convert the old Nidec fan plugs into jumpers to fool the mobo, but need guidance. It would be immensely helpful if someone could post a solution to this problem, with pictures.
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Post by Musabi on Nov 12, 2004 18:03:18 GMT -5
Hrm. Im not going to go as far as to give you pictures :S pretty much you have to splice the old dell propritary cables and your new stealths cables, and connect the same colors, not too complicated. Black = Negative, Red = Positive, Yellow = RPM's on the Dell fans, I dont know what it is with your Vantecs, but hopefully they are the same (they were on my thermaltake silent cat)
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Post by TRow on Nov 13, 2004 12:30:22 GMT -5
Thats some sweet work man, very nicely done.
T.RoW
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Post by devnull on Nov 13, 2004 15:33:46 GMT -5
Hrm, I think the Gen3 has a different proprietary fan pin because none of those little black pieces look familiar. That kinda sucks for me....
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