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 Post subject: need to get quiet... Athlon XP 1800+, alpha PAL8045, antec
PostPosted: Wed Jan 29, 2003 12:09 pm 
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Joined: Wed Jan 29, 2003 11:49 am
Posts: 5
here's the deal-

i'm running:
athlon xp 1800+
Alpha PAL8045 HSF with the stock 80mm delta fan outputting 45 CFM

this fan is loud... i need to get the noise down a bit, but i don't know how much CFM i can sacrifice, or what route i should take in terms of getting the most quiet fan.

at the moment, i'm considering getting an adaptor to go from 80mm to 92mm, and then get a quieter fan on there that way. any other suggestions?

i'm also running the stock fans in the PSU that came with my antec SX1030B case, as well as the 2 fans on the back... i'm considering replacing those 3 with panaflos, but am looking for any other options.

thanks.

-quad


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 Post subject:
PostPosted: Wed Jan 29, 2003 12:59 pm 
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Joined: Sat Dec 14, 2002 10:08 pm
Posts: 74
Location: Santa Cruz, CA, USA
your motherboard might have come with cpu temp monitoring software.. i think speedfan also monitors cpu temps.

i have an..
slk-800.. some generic fan @ 7V (until my panaflos come in)
amd xp2600+

amds are said to take up to 80C.. my idle cpu temps havent gone over 45C and ive read some people passivley running their amds around 65C. im not sure how effecitve the alpha hs is, but i dont think you need to put on a 92mm... cause 80mms usually run quieter. i think your first step would be to monitor your temps so you can experiment with different voltages. then if youre not satisfied make the jump and buy some fans to play with.


Last edited by L4177312 on Wed Jan 29, 2003 1:19 pm, edited 2 times in total.

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 Post subject:
PostPosted: Wed Jan 29, 2003 1:02 pm 
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Joined: Wed Jan 29, 2003 11:49 am
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i currently get about 43 deg C at full load... so i suppose that's not too terrible. i think i'l ltry putting one of the stock fans from my case on the HSF and see what kind of temps it gets that way

-quad


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 Post subject:
PostPosted: Wed Jan 29, 2003 2:59 pm 
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Joined: Sun Jan 19, 2003 4:47 am
Posts: 218
you could try stepping the fan down to 7 or even 5v, should make it one hell of a lot quieter, and so long as you stay below ~60c there should be no problem

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jh


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 Post subject:
PostPosted: Wed Jan 29, 2003 3:10 pm 
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Joined: Wed Jan 29, 2003 11:49 am
Posts: 5
ack. i suppose i could; i don't feel like cutting up my connectors at this point.. .as long as i've got some fans that have a lower air output that i can try, i'll do that for now, then make some decisions beyond that after a few days of trial. thanks for the advice


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 Post subject:
PostPosted: Wed Jan 29, 2003 3:46 pm 
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Joined: Sat Jan 04, 2003 3:45 am
Posts: 146
Location: New York, NY
If it's an AMD board, you can play around with Speedfan:
http://www.almico.com/speedfan.php

Word of advice: Watch the fan when you play with it, and make sure it's still spinning. Speedfan reports 0 RPM many times when the fan is still spinning...

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 Post subject:
PostPosted: Wed Jan 29, 2003 3:50 pm 
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Joined: Sat Dec 14, 2002 10:08 pm
Posts: 74
Location: Santa Cruz, CA, USA
changing the voltage is really inexpensive and imo brings the most noticable results. instead of cutting wires and whatnot you can get 3 to 4 pin adapters for like 50 cents and do this mod.

http://www.overclockers.com/tips766/

and a link to where i bought my adapters
http://www.svc.com/3pinto4pinad.html


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 Post subject:
PostPosted: Wed Jan 29, 2003 5:49 pm 
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Joined: Sun Jan 19, 2003 4:47 am
Posts: 218
easier still you could get one of those Zalman adapters - giving you 4 extra 3-pin headers- 2 @ 5v, plus an extra 2 @ 12v (although I moded the 12v ones to 7v). I only work in GBP, but they're £3 which I think is about $4??

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 Post subject: Is the fan blowing or sucking?
PostPosted: Wed Jan 29, 2003 8:13 pm 
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Joined: Mon Dec 09, 2002 7:11 pm
Posts: 7368
Location: Maynard, MA, Eaarth
Hello:

The 8045 is an excellent HS -- to switch to the SLK-800 would be a very small improvement. Is the fan set up to blow down into the HS, or is it pulling air up through it? Alpha recommends the latter -- that aluminum shroud is to help the air flow enter the pins down low so the cool air hits the warmer part of the HS. Apparently, it performs about 5% better when the fan is sucking air through the HS.

Yeah, and undervolting the YS Tech, or putting a quieter fan on there and possibly undervolting that -- as long as your temps don't peak much past 60C, or certainly if you keep it under 50C under constant load; that's all you need. And if you could try undervolting the CPU -- it's quite likely that a later XP 1800+ is capable of running stabily at a lowered voltage, if your motherboard provides for it. This would help you run a lot cooler!

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 Post subject:
PostPosted: Wed Jan 29, 2003 8:40 pm 
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hmm.. yes. actually, i've tried the fan in both blow and suck... and believe it or not, it runs about 2 degrees C cooler when in blow mode. i just threw a 35 CFM fan on there to experiment with minimum airflows, and with a good load, my temps seem to have gone up about 4-5 deg C, up to about 42 C. definately within tolerances. that fan's a 30 dB antec, and it's relatively quiet, but i think i'd like to still stay around 35 CFM, but get below 25 dB. i found that the Papst 8412N/2GM does 23 dB and 36 CFM - just about what i want. anyone have any history with this fan, or any clue where i can get it for less than $35? thanks for the input. it's helpin a lot. this comp puts out a buttload of noise, but even swapping the fan as i did today already significantly dropped the noise. next to go is the PSU fan... probably the loudest in the case.


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 Post subject:
PostPosted: Thu Jan 30, 2003 8:14 pm 
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Joined: Wed Jan 29, 2003 11:49 am
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any comments on the papst?


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