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Old 12th March 2004, 06:01   #21
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first a picture of a dual fan psu :
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Old 12th March 2004, 06:04   #22
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@ jakkerd ;

a dual fan psu blows with 1 fan direct at the hot components of the psu
(i'm short in time , will expand my reply after school)
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Old 12th March 2004, 06:38   #23
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Quote:
Originally posted by jakkerd
if u have a dual fan psu, you wil have a fan that will suck that hot air into the psu
that would be even worse then
i don't think that sophron's solution is a bad one
IMO that's even more wrong. check my attached file

you're saying dual fan PSU's are not good. if they would be, why are they manufactured then? dual fan PSU's not only have direct cooling over their heatsinks, they also help sucking the hot air away from the CPU.

now you can think: oh, the dual fan PSU sucks air away from the CPU so it does get hotter anyway. that's wrong, check the picture. if he would have used a PSU with cover and only one fan, the heat of the CPU would get into the PSU anyway

check the third pic: I don't think the 2nd fan of the PSU may be stronger then the 1st (outtake) fan though, that would make the hot air being blown out at the back of the PSU, back into the case (yellow arrow)
 
Old 12th March 2004, 06:43   #24
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Just do as I did. Place a 120mm in the bottom of the PSU and take the 80mm out.
 
Old 12th March 2004, 07:09   #25
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Quote:
Originally posted by Vulk
in the boddem
/me hands Vulk a coffee to get him fully awake!
 
Old 12th March 2004, 10:15   #26
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Quote:
Originally posted by jmke
so you don't think that the extra layer between you and the FAN had anything to do with the noise?...
If you mean by 'FAN' ; the cpu fan ,
then no , the system i tested is very silent. nly 2 fans , 1 low profile 60 mm on the cpu @ 6 V ,(vitual unhearable) and the psu output.

When i took the bottom of that psu out , i installed the pc back , it made no more noise then before, but then the temperature was building up , and i could really hear the psu outputfan accelerating.

The methode Sophron uses results in better casecooling but also in worse cooling of the psu components in my humble opinion.
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Old 12th March 2004, 15:15   #27
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I tried placing HD lower but there are no slots for that. The empty tray under the FDD is tight and dont let any space for cooling. 3rd 3.5 tray(2nd tray under the fdd) is interfiering with ide ports on mobo. I'm working on a HD holder in front of front blow-in fan. This will make HD realy cool My vid-card is on board GF4 MX,its a nForce2 mobo. O/B vid-card is doing well I can play NFS underground or call of duty at 800x600 smooth. But I'm planning to buy a 9600 soon

Bonbon's fan speed test is intresting. Maybe taking the cover isn't the best idea but there is no way to test this accurately I guess. I put my hand back of the psu and I dont feel hotter air with this new design. Notice that I use 9.2 cm cpu fan,its not attached directly to the heatsink. It blows air not only to the cpu but also on the mobo,north bridge and with the help of holed aluminium to the psu. So as you can see from the picture, heatsinks of the psu are also cooled by(at least I believe so) cpu fan. Thus I can say that if I'd used a traditional cpu cooling then psu heatsinks wouldnt have cooled. This theory explains bonbon's hi-rpm fan noise...

With this new cooling tactics I almost cut the noise
1- I dont use noth bridge active cooler,just bought a zalman N/B heatsink.
2- I dont use up and back blow out fans,just the psu fan is taking all the air out. (16-20 C room temp. when summer comes I can active other fans
 
Old 12th March 2004, 15:16   #28
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sorry for the pic,I did cut it worngly
 
Old 12th March 2004, 15:29   #29
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fixed
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Old 12th March 2004, 15:30   #30
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i guess your 92 mm zalman fan cools your psu also idd , didnt thought of that

anyway your system is stable and silent , so i guess its fine
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