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Posted: Sun Jun 02, 2002 11:12 am Post subject:

OK, the new case I have is a Chieftec DA-01WD (big tower w/ blowhole).

CPU: Intel 2.4 GHz Northwood
HSF: Swiftech MCX462A Power

I got CPU core temps of 50°C. So I changed the direction of the CPU fan to blowing towards the Heatsink and also the blowhole (but in the wrong direction, so the blowhole actually sucks). This got me temps of 45°C after 4h Seti.

I realized the blowhole was working in the wrong direction, changed it, so that bothe the HSF and blowhole blew toward the Heatsink. Bad idea, got me temps of 47°C core temp.

Changed the blowhole again, temp down to 45°C.

Do you believe this?? I can't explain it. As I get it, if both fans are blowing in the same direction fresh (cool) air is brought right to the HSF from outside the box on the shortest way. But not in the universe of Chieftec.

Right now the blowhole sucks air from inside the case and the HSF sucks air also from the inside. So in theory they take each others air away, fighting themselves.

I have a Gainward GeForce 4 Ultra 750XP and that sucker is pretty warm. So maybe the blowhole fan is not that strong to fight the HSF, but instead sucking away the heat from the GeForce...

I have ordered a bunch of YS-Tech 80mm fans to aid me in my quest (coming next week).

If anybody could explain this to me I would be very grateful.

Most people do not know how to behave in a massacre.

Posted: Sun Jun 02, 2002 2:18 pm Post subject:

That sounds pretty warm for a Northwood with a huge Swiftech heatsink. Which 80mm fan do you have on the Swifty? Do you have a reading for the motherboard or case temperature? Does your power supply have a thermally-controlled fan?

You may be on the right track with changing the case ventilation around. I suggest populating the other four 80mm case fan holders (one low down on the front, one in the lower 3½" drive, and two on the back below the power supply). The two in front and the blowhole should blow in, while the two on the back and the power supply will blow out.

You may want the two on the front to be relatively quiet (<30 dBA). The Papst 8412N/2GML looks like an extremely quiet solution (26½ cfm at 19 dBA), but I haven't tried one yet. The Panaflo FBA08A12L(24 cfm at 21 dBA) and Vantec Stealth 80mm (27 cfm at 21 dBA) are also quiet.

For the CPU heatsink, you will probably want more flow than those very quiet 80mm fans can provide. I'd suggest at least 35 cfm, but you will still want to stay below 40 dBA if noise is an issue for you.

:pawa1:

Big Dog Joined: 20 Oct 2000 Posts: 3689 Location: USA

S.O.S

what exactly is the blow-hole situated over vertically on your Mobo Confused

:

and which Mobo do you have Confused

:

I looked at the case over on the Directron site and saw the internal layout of the rest of the fans

my suggestion to you would be to populate all the front fan spots with some of those thermaltake fans with the thermal sensors, and same with the back fan spots

then, to help out your GF4 card, add one of these:

OH, and you should probably consider getting rid of that blow-hole, because it's F*cking up your airflow

Posted: Sun Jun 02, 2002 8:15 pm Post subject:

i agree with brain...im actually thinking of adding one of those below my modem....cause it gets rather hot....

Till animal control gets called

INSUFFICIENT KNOWLEDGE

Posted: Sun Jun 02, 2002 9:25 pm Post subject:

The mobo is one of those ASUS P4S533, the blowhole is attached in a direct vertical line over the HSF. On the HSF is a Papst fan, one of those quite ones, I already connected it directly to the PSU to get it running at maximum always.

This GeForce fan is quite interesting, do you have a model number or a vendor?

Most people do not know how to behave in a massacre.

Posted: Sun Jun 02, 2002 9:56 pm Post subject:

The Papst is probably super-quiet, but it may not move enough air for your CPU. You should try an 80mm fan with a bit more grunt on your heatsink, like this cheap but effective 2900rpm unit ($7):

http://www.thermaltake.com/products/dcfan/8025.htm
I have one of these on an Alpha PAL8045 on an AthlonXP 1700+. The CPU normally runs just 39 to 40°C with a case temperature of 28°C.

Or you could go with this cheap but powerful thermally-controlled 2900 to 5300rpm unit ($9):

http://www.thermaltake.com/products/dcfan/a1214.htm
I have one of those on a Volcano7 on an AthlonXP 1800+. It is normally very quiet when the case temp is not extremely hot, hovering around 3800 to 4200 rpm with the case temp at 28 to 32°C. The CPU runs an acceptable 51°C.

:pawa1:

Posted: Sun Jun 02, 2002 10:33 pm Post subject:

Quote:

The Papst is probably super-quiet, but it may not move enough air for your CPU. You should try an 80mm fan with a bit more grunt on your heatsink, like this cheap but effective 2900rpm unit ($7):

http://www.thermaltake.com/products/dcfan/8025.htm
I have one of these on an Alpha PAL8045 on an AthlonXP 1700+. The CPU normally runs just 39 to 40°C with a case temperature of 28°C.

Or you could go with this cheap but powerful thermally-controlled 2900 to 5300rpm unit ($9):

http://www.thermaltake.com/products/dcfan/a1214.htm
I have one of those on a Volcano7 on an AthlonXP 1800+. It is normally very quiet when the case temp is not extremely hot, hovering around 3800 to 4200 rpm with the case temp at 28 to 32°C. The CPU runs an acceptable 51°C.

:pawa1:

Forgot to mention my mobo temp: 39-40°C under load.

All temps I have mentioned are with Seti running in the background for at least 20 minutes.

I will get me one of those badass high power fans. The Papst is a whimp. (The one on my Heatsink that is).

Most people do not know how to behave in a massacre.

Posted: Sun Jun 02, 2002 11:21 pm Post subject:

Quote:
This GeForce fan is quite interesting, do you have a model number or a vendor?

I believe Brain's talking about a different fan, but Thermaltake has put out their high-performance solution. Here's a review; I think I'm going to snatch one up for my Ti4200.

------

things you need to hear.

Posted: Mon Jun 03, 2002 7:53 am Post subject:

I believe that Gainward wouldn't put anything weaker than the one from TT on their Golden Samples. But the System Cooler would fit right in for the backside of the GeForce.

Most people do not know how to behave in a massacre.

Big Dog Joined: 20 Oct 2000 Posts: 3689 Location: USA

Quote:

The mobo is one of those ASUS P4S533, the blowhole is attached in a direct vertical line over the HSF. On the HSF is a Papst fan, one of those quite ones, I already connected it directly to the PSU to get it running at maximum always.

OK that changes the options for the HSF/Blow-Hole a little bit . . . either:

1) get a higher CFM constant speed fan for the blow-hole and then build yourself a duct so that the blow-hole fan sucks the air directly off the heatsink without another fan on the heatsink and blows the air directly outside the case

or get yourself a slightly better fan for the HSF and stick with my remove the blowhole advice

Quote:
This GeForce fan is quite interesting, do you have a model number or a vendor?

you mean this thing:

that's not a GF fan . . it's a slot cooler that you should be able to pick up anyplace for around 8-12 bucks (US)

Spot did a review of one a while ago

I put one directly below the vid card with it grabbing the hot air right off the card and getting it out of the case before it can stick around and cause the ambient temps to rise anymore

Quote:
Or you could go with this cheap but powerful thermally-controlled 2900 to 5300rpm unit ($9):

That is the type of fan I was suggesting you get to populate the 3 fan slots in the front of the case, and the 2 fan slots located in the back of the case

this will keep a definite Front to Back airflow going and it will be controlled by the temps inside of the case which should keep the noise down

you want to keep your fans balanced:

if you only have one in the front, only mount one in the back (both in the top spot)

if you only have 2 in the front mount one at the top, and the other at the bottom (in the back you'd want the 1 on the top, and then that card cooler under your GF)

and if you go with all 3 in the front then put both in the the back and the card cooler

if you decide to go with the blow-hole/ducting solution you should go with atleast the 2 fan scenario

Posted: Mon Jun 03, 2002 11:28 am Post subject:

I will go for the 3 in the front, 3 in the back scenario. I surely will look into the fan duct thing, but not before I start to o/c that bitch, which will happen sometime next week (waiting for the PSU I have ordered (430W), not the one that I got (350W)).

Thanks for all the infos guys, it's always a pleasure to ask a question in here.

Most people do not know how to behave in a massacre.

Posted: Mon Jun 03, 2002 8:13 pm Post subject:

Quote:

OK, the new case I have is a Chieftec DA-01WD (big tower w/ blowhole).

CPU: Intel 2.4 GHz Northwood
HSF: Swiftech MCX462A Power

I got CPU core temps of 50°C. So I changed the direction of the CPU fan to blowing towards the Heatsink and also the blowhole (but in the wrong direction, so the blowhole actually sucks). This got me temps of 45°C after 4h Seti.

Something is not right, and my suspect is the HSF. You've got enough air flowing through. Check the thermal paste on the CPU.

You didn't say what the ambient temp is though, which is significant.

Another thought here though is maybe you're moving too much air through. Reason why, is I'm running the SX630 with an XP2000 Athlon, and I'm running right around 42C, and this is with a basic coolermaster HSF and a single exhaust fan. I don't sweat the 42C as it is within spec, but AMD's tend to run a bit warmer.

iceman

--
how many fingers winston?

Posted: Mon Jun 03, 2002 10:00 pm Post subject:

Quote:
Check the thermal paste on the CPU.

Good suggestion. Some wild folks around here have suggested that thermal compound is "optional". flamer

Quote:
Another thought here though is maybe you're moving too much air through.

I don't believe that there is any such thing. If you don't have so much air pressure that you're blasting things loose from the motherboard, then it should not hurt the cooling to have more flow. There is a point at which more air flow does almost no more good, but I do not believe that it will ever hurt. However, there is definitely a point where you have "enough" air, and adding more does little more than increase the noise level.

:pawa1:

Posted: Mon Jun 03, 2002 10:18 pm Post subject:

dont blow hot air away from your cpu...blow cool air on it......i lowered my cpu temp 25 degrees when its loaded by adding a plasic duct and a 32cfm fan that just FORCES air into the heatsink fan i allready have.....it sounds like a turbine, it works like a turbine, maybe it is a turbine...heh heh

Till animal control gets called

INSUFFICIENT KNOWLEDGE

Posted: Tue Jun 04, 2002 12:39 pm Post subject:

Ok, today the fans came along with my schweeet little DigiDoc5.

MB temp is down from ~39°C to ~26.5°C,
CPU temp is down from ~45°C to ~40°C,
ambient temperature is 25.4°C.

I can still hear and I will be able to sleep in the same room as well (as if I would need to do it.)

I won't mess with the CPU as it will be exchanged against the 2.4GHz model with FSB 133. (That dufus mixed 'em up and gave the wrong one, then realized it and called me up).

Most people do not know how to behave in a massacre.