Cooler Master Hyper 48 CPU Cooler - and my P4P800

[Falstaff]

just bought a good fan on a close out at PC Club here in Colorado Springs, noticed that there are no 4 pin fan connecters on my mobo, and I dont believe there are any on the Antec 430w power supply...sooooooo, I connected the beast to the three pin per the instructions from the manufacturer, and guess what, hardware errors..LOL.
Now I can live with that really, and it doesnt really bother me too much, but is there a 4 to 3 pin adapter with a molex connection out there somewhere I can pick up for a few washingtons?

[dj_stick]

is it the same sort of plug as the 3 pin fan connectors?

if so the fourth wire is for controlling the fan by the mobo, not really required if you have your own rheobus or don't care about controlling the speed

for interest what sort of hardware errors?

[Falstaff]

Originally Posted by dj_stick

is it the same sort of plug as the 3 pin fan connectors?

if so the fourth wire is for controlling the fan by the mobo, not really required if you have your own rheobus or don't care about controlling the speed

for interest what sort of hardware errors?

CPU fan not present

[dj_stick]

interesting

does the fan still work though?

also there should be an option in your bios that you can set to "ignore" cpu fan warnings

[Falstaff]

Originally Posted by dj_stick

interesting

does the fan still work though?

also there should be an option in your bios that you can set to "ignore" cpu fan warnings

tis true...but I like to know whats going on...even though I dont bench really

[H3X4D3C1M4L]

OK it says there is no fan if it doesn't detect an RPM signal so that's normal and if your machine hasn't melted you're OK.

If the fan is spinning it should be fine.

What I would do is just take a spare molex splitter or somesuch plug you aren't using (We all have them laying around somewhere) and then just solder the red and black wires of the fan to the 12v red and black wires on the 4 pin molex.

Voila. Problem sovled.

[Falstaff]

yeah...12 volt connection will ensure it will spin at the highest speed all the time...
thanx

[Necrosis]

Owned that same board on my last P4, there is a feature in the bios to turn off CPU monitoring.

[dj_stick]

Originally Posted by H3X4D3C1M4L

OK it says there is no fan if it doesn't detect an RPM signal so that's normal and if your machine hasn't melted you're OK.

If the fan is spinning it should be fine.

What I would do is just take a spare molex splitter or somesuch plug you aren't using (We all have them laying around somewhere) and then just solder the red and black wires of the fan to the 12v red and black wires on the 4 pin molex.

Voila. Problem sovled.

on the molex plug, the 12v line is the yellow wire

i myself own an asus board, under the hardware monitoring section of the bios for my board, it shows the RPM of fans attached, hitting the + key when the rpm of the cpu fan is selected with set it to "ignored"
i'm not sure if this is the same on earlier models though

[H3X4D3C1M4L]

Really? Well....the yellow and then the black one closest to it....otherwise you're overvolting.

[dj_stick]

or undervolting the red wire is 5v

though connecting the positive lead to the yellow wire and the negative to the red wire, you get 7v, which is enough power for most decent fans, and at a lower speed (lower noise) without using a rheobus - but i don't really recommend this on a CPU fan

[H3X4D3C1M4L]

Yeah but it is possible to overvolt if you apply alot of positive current but remove very little negative current.

Anyway with a little fiddling around it should be OK

[The_Neon_Cowboy]

Originally Posted by dj_stick

or undervolting the red wire is 5v

though connecting the positive lead to the yellow wire and the negative to the red wire, you get 7v, which is enough power for most decent fans, and at a lower speed (lower noise) without using a rheobus - but i don't really recommend this on a CPU fan

This is verry hard on the PSU I have read. There are other & better
ways to do this with fan controllers, resistors etc... I wouln't use it
on any fan my self. If anyhting most 80MM and smaller fan will run
on 5V.

But keep in mind when you lower the voltage, you lower both the
noise and airflow...

Originally Posted by H3X4D3C1M4L

Yeah but it is possible to overvolt if you apply alot of positive current but remove very little negative current.

Anyway with a little fiddling around it should be OK

huh? where would this magical current go there has to be enough ground.

(I don't think most of us would let you touch our computers with a 50 foot poll)

[dj_stick]

Originally Posted by The_Neon_Cowboy

This is verry hard on the PSU I have read. There are other & better
ways to do this with fan controllers, resistors etc... I wouln't use it
on any fan my self. If anyhting most 80MM and smaller fan will run
on 5V.

i haven't heard that, but i wouldn't be too surprised - the 5v line would be acting as a ground substitution then, might stress a PSU a little too much

Originally Posted by The_Neon_Cowboy

But keep in mind when you lower the voltage, you lower both the
noise and airflow...

that's a given

Originally Posted by H3X4D3C1M4L

Yeah but it is possible to overvolt if you apply alot of positive current but remove very little negative current.

Anyway with a little fiddling around it should be OK

i think i know what you're talking about, using the 12v line and 5v ground?
but ground is ground, in the PSU all the black wires are soldered to the same point/rail so it doesn't matter all that much which ground wire is used. I think with the dual ground wires on molex/fdd/sata plugs is to help prevent ground looping and spiking between the different circuits - if what you were saying were the case a sata cable would have 3 ground wires (one for each of the rails, 3.3v,5v,12v) but there's only two