View Full Version : How to dissable rpm control HSF Intel
Eduardo
08-19-02, 02:01 PM
:confused:
I have Asus P4B266-C; P4 2.0Ghz @ 2.4Ghz; 1.80 Vcore; Cpu Temp 60ºC; Fan 3500 rpm.
Every thing works fine but Fan increase speed from 2600 rpm to 3500 rpm only when Cpu temp reaches 60ºC.
I realy dont know maximum intel fan speed, I read over and over the manual and there are not via dipswitches or Bios a way to Disable the control speed.
It seems that Fan control do not let to increase Cpu temp above 60ºC because rpm increase more and more to control temp at 60ºC.
I need some help to dissable if possible the speed control.
If you use a three pin to 4 pin adapter and plug the fan into that you will get max rpm's all the time.
Eduardo
08-19-02, 05:48 PM
If you use a three pin to 4 pin adapter and plug the fan into that you will get max rpm's all the time.
How is that, Intel Fan as 3 pins and Asus Mobo as 3 too, is these adaptor between the 2 conectors?.
Sorry. What I meant is buy an adapter that allows you to plug the 3pin plug on the fan into one of the four pin molex connectors direct from the psu.
I forgot to mention that this will mean you have no rpm monitoring as the fan will not be plugged into the m/b at all. If you want rpm monitoring you can also get 3 to 4 pin adapters that have a seperate plug that goes to the mobo with the sensor cable. Either of the above methods will mean the fan will run at max speed all the time.
mjones73
08-20-02, 11:29 AM
Sorry. What I meant is buy an adapter that allows you to plug the 3pin plug on the fan into one of the four pin molex connectors direct from the psu.
The fan on the Intel heatsink is variable speed, it doesn't matter what you use for a power source it's gonna run slower til the processor hits 60C. The only way to fix this problem is to rig a different fan onto your heatsink or get a different fan and heatsink combo. It's NOT the motherboard that's controlling the fan speeds.
ah ha, my bad I think, its along time since I had a stock intel heatsink. Surely though you could do the same trick as the volcano 7 fan and short the thermistor???
asw7576
08-20-02, 01:40 PM
You could short the rpm's SENSE wire (dunno the color) and the ground (black). You can use a small copper wire and insert it within the fan connector (dark brown).
Beware that motherboard's rpm monitoring capability is gone, 0rpm.
mjones73
08-20-02, 02:46 PM
It has nothing to do with the SENSE wire either, that would just break your RPM monitoring, not make the fan run full speed. You'd need to find the thermistor on the fan like nixie stated and short it.
Eduardo
08-20-02, 09:55 PM
Thanks to everybody.
I will try to dissable the fan and see if I can find the termistor and short it to get maximum speed.
It should be easy to find, it will be the only component sticking out of the casing of the fan. If you look at the article here (http://www.overclockers.com/articles614/) the second pix shows what a thermistor lookks like in a fan assembly.
sidewinder
09-07-02, 08:12 PM
anyone figure this out yet? I've got the 2.53 and the stock fan is running at 2600 all the time even when the CPU reaches 59C. would like the fan to run a max speed all the time.
I think your best bet would be to invest in a aftermarket hsf. The Volcano 7+ works well and doesn't cost much more than half an arm.
asw7576
09-09-02, 12:52 AM
I opened my Intel HSF last night to check out the thermistor inside. Here my findings, it is impossible to short the thermistor inside without breaking the plastic parts. Has someone in this forums have any idea to short the thermistor?
MJones & Nixie are right about shorting SENSE wire to GROUND, it produce nothing but loss of rpm monitoring capability.
The only way I could think of then is melting a hole in the casing to get access <--- Very messy.
I had a play with a mates FCPGA2 retail sink yesterday and got better performance from it by removing the intel fan and ducting a high volume 92mm fan onto it. You may want to try this as a fan only cost a few dollars and ducting can be made out of cardboard and sticky tape. The only problem we had was supporting the fan, which was solved using picture hanging wire to 'suspend'the fan int he right place.
btw did you destroy your fan during the experimenting then?
asw7576
09-09-02, 10:35 AM
Are you asking me, nixie? No, I didn't break it apart, I opened the sticker and there is no "sticking out" thermistor underneath. Maybe I should buy other and better heatsinks. I don't want to waste time figuring out how to increase Intel's rpm.
sidewinder
09-09-02, 02:31 PM
OK, found a way to make this a little better....noticed the thermistor is mounted on the bottom portion of the intel cover on the stock fan. It looks like a small black IC chip and is visible through the little gap between the fan and the cover. I was going to initially cover it up to make it artificially hot but there is not enough gap to put anything in there. Since the termistor was close the to exhaust fan, I just flipped the fan assembly 180 so the termistor is now closer to the drives. Also taped up the gaps so the tapes barely meets the turning fan.(~1mm) This seems to have helped. My cpu now tops out at 56-57 running prime95 and idles around 46-47 idle. Fan speed climbs to ~3000 at the top end.
Originally posted by asw7576
Maybe I should buy other and better heatsinks.
I agree, the time would be better spent driving to the local shop and picking something better up. The time spent to performance gain would be much bigger.
asw7576
09-10-02, 12:35 AM
Nixie, I bought another Thermaltake again, (my first one is Rest In Piece in my drawers due to broken arms and legs). Actuallly I am looking to buy CoolerMaster Everest, but I could not find any.
Sidewinder, are you sure that "little black IC" underneath PCB is thermistor? I observed my Intel HSF, and see that component too, and logically it should be the thermistor. Now, what to do? should I short it?
I would try tonight your idea.... I post my experience tomorrow...
mjones73
09-10-02, 09:21 AM
You need to connect the 2 leads on it together.
asw7576
09-10-02, 12:33 PM
OK SideWinder... you are wrong. The small black IC underneath PCB IS NOT thermistor. I short it in four different ways and the fan did not turn. Thanks to you, my HSF was going major operation just to soldered the small black IC underneath PCB.
No... No... I am not mad to you.... I don't use it anyways...
Eduardo, look at my thread at Intel forum, I solved your problem!!
Very easy to do and no need soldering nor major operation.
Originally posted by asw7576
(my first one is Rest In Piece in my drawers due to broken arms and legs).
lol, What happend to it?
asw7576
09-10-02, 01:53 PM
Do you know that crap HSF is very difficult to dismantle from mobo's rectangular plastic socket? Once I want to open the damn thing, and it took me almost 1 hour figuring out how to take it off from the socket. It sticks like super glue. Geez... you don't want to experience it... it could scratch the mobo. And so I decided to use pliers to squeeze the arms (clips) and sh*ts happened. It broke off, and I tried the other arms and sh*ts !!! it broke off again! I said "damnn" . So I buy it again because it's cheap.
Now, that crap is rest in piece, and it's new friend (the same crap character) is going to My P4-2A, other than being difficult to dismantle, it's good HSF.:D
I like it. Death to the crap.
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