[b]Under[/b]clocking a celly 433?

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Char
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[b]Under[/b]clocking a celly 433?

Post by Char »

I was thinking of having a go on passive cooling of my dual 433 on the bp6.
I don't really need all processing power, as its used as server only, and idling most of the time.
Giving that the mulitplier is locked, and bus speed is already 66 Mhz, is there any way to underclock those CPU's to cool them off a bit?

[/b]
Derek
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Post by Derek »

You can try reducing the voltage a little bit. Reducing the voltage alone will significantly affect the heat output of the processor.
-Derek
Char
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Post by Char »

Hmm.. maybe I should find a generous person who wants to swap my pair of 433's for a pair of 300A's ?
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purrkur
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Post by purrkur »

What you could do is to do what Derek mentioned, lower the voltage a bit. Also, if your two heatsinks are the same size then you could remove the small fans on top of them and install a single, 80x80mm fan on top of both of them. I would recommend something like the Papst fans that run really quiet (Around 1500rpm). Just monitor your temperatures though if you do this to make sure that the temperatures don't get too high...
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BCN
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Post by BCN »

just get copper heatsinks and take off the fans, lower the voltage to 1.5-1.8V level and be COOL.
My 366 were booting at 1.3V at their default speed, but were stable only at 1.5V

Good luck!
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davd_bob
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Re: [b]Under[/b]clocking a celly 433?

Post by davd_bob »

Char wrote:I was thinking of having a go on passive cooling of my dual 433 on the bp6.
I don't really need all processing power, as its used as server only, and idling most of the time.
Giving that the mulitplier is locked, and bus speed is already 66 Mhz, is there any way to underclock those CPU's to cool them off a bit?

[/b]
A word of caution. Remember, although idle most of the time...it still has to work on those rare occasions at whatever its maximum load is.

Realisticly drop the voltage to 1.85 or so and see if the unit is stable then don't do anything else.
There are *almost* no bad BP6s. There are mostly bad caps.

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Dave Rave
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Post by Dave Rave »

mine have run quite well at 1.85
I think even 1.80 though not lately
makes em a lot cooler, though quiet slow fans would be quite sufficient if it's idle.
if it's seti, expect more heat
Char
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Post by Char »

thanks all- (impressive number of replies- this must be where the real dedicated ppl are :P )

I'll report here later!
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BCN
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Post by BCN »

you have just guessed it :)
Dual C366@550MHz 1.90V :) (History)
yet single PIII-S 512Kb L2 cache at 1400MHz@700MHz
BP6 (not modded yet)
256MB PC133 C2
GF4Ti4200-8x
Maxtor 2x60Gb - all on promise ATA133
Lite-On LTR 40125S@48125W!!!
Plus P4 system
Derek
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Post by Derek »

:cheers:
-Derek
Char
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Post by Char »

I'm gonna try this: http://www.bp6.com/board/viewtopic.php? ... highlight=
And see what happens without the fans, or make them temp controlled
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loophole
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Post by loophole »

If you want to underclock your celerons try a program CPUFSB found here:

http://www.cpufsb.de/CPUFSB.HTM

tell it you have an Abit BP6 and see if you can set the FSB to less than 66MHz (say 60MHz or 50)

I haven't tried this on my BP6 (it's currently in peaces on my kitchen table :D ) but it let me set the FSB to less than 66MHz on two other Gateway boards that didn't let you set the FSB this low in the BIOS, so it's worth a try.

Hope this helps,
loophole.
Still kicking along with the Abit BP6 :-)
Wolfram
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Post by Wolfram »

purrkur wrote:Also, if your two heatsinks are the same size then you could remove the small fans on top of them and install a single, 80x80mm fan on top of both of them.
Just saw this old post... this is exactly what I did on my dual Athlon setzp (MSI K7D). I put a single 12cm fan (@7V :twisted:) on top of the two (cheap) Arctic Cooling Copper Silent 2 Rev.2 heatsinks, because the original 8cm fans were anything but silent for my ears. The fan is decoupled with some synthetic sponge pads.

The CPUs (XP 1800+... now running @1666 MHz) do get hot, but are stable even with a copy of the "Toast" burn programm running on each CPU.
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