Search found 180 matches

by SpyderCat
Fri May 09, 2003 10:17 am
Forum: Fans and Control
Topic: Influence of restrictions/underpressure on RPM & CFM
Replies: 28
Views: 10853

Dammit !
Chris, I worked on a long post for at least 2 hours, only to get a "invalid session" message when I hit the "submit" button.

I'll try to recreate the message, this time in notepad ! :x :x :x

To all: worked on a long post? Copy/Paste a backup before sending your message !
by SpyderCat
Thu May 08, 2003 3:42 pm
Forum: Fans and Control
Topic: Influence of restrictions/underpressure on RPM & CFM
Replies: 28
Views: 10853

Hi Han, looking at your system you have 3 enclosures: 1 - the mobo: theoretically generating 48W of heat (VCore regulator inefficiency, RAM, Graphics & other). Intake temp 20, exhaust 25, cfm 17.93 (total of the cfm in 2 and 3 below). So calculated power = 17.93 * 5 / 1.76 = 51W - pretty close :) 2...
by SpyderCat
Thu May 08, 2003 2:33 pm
Forum: Fans and Control
Topic: Influence of restrictions/underpressure on RPM & CFM
Replies: 28
Views: 10853

There is one thing bugging me: Mike's review of the Nexus 3000 gave an efficiency of about 70% at power consumption around 110 watts. ... When the total power consumption = 111 watts and the PSU's efficiency=70% --> Net output PSU= 70%*111 = 78 watts ... What numbers should be corrected ? OK, after...
by SpyderCat
Wed May 07, 2003 3:08 pm
Forum: Fans and Control
Topic: Influence of restrictions/underpressure on RPM & CFM
Replies: 28
Views: 10853

Verneuker's constant Footnote for those not familiar with Verneuker's constant : as above it is actually variable, and is defined as the ratio between the correct answer and the answer you calculate. :lol: :lol: :lol: :lol: :lol: :lol: Dammit Chris, You made me splash half a glass of wine over my k...
by SpyderCat
Tue May 06, 2003 1:30 pm
Forum: Fans and Control
Topic: Silenx vs Panaflo at Identical Flow Rates
Replies: 42
Views: 19703

Tubes/Bottles of epoxy have warnings on them for good reason: o You may not be allergic to them with minor skin contact ---- however epoxy resins, eg, West System aren't friendly o However allergy is accumulative by exposure ---- and you may suddenly find a quite nasty skin/respiratory reaction A s...
by SpyderCat
Tue May 06, 2003 12:53 pm
Forum: Fans and Control
Topic: Silenx vs Panaflo at Identical Flow Rates
Replies: 42
Views: 19703

Dorothy, a few remarks: o External mounting can save you about 4-5dB(A) on noise levels ---- however /please/ fit a grill because some fan blades are SHARP 1. The blowing side of a fan is quite protected by the "motor-mounting-spokes" 2. The blades are angled in such a way that anything approaching ...
by SpyderCat
Tue May 06, 2003 11:42 am
Forum: The Silent Front
Topic: Who is Digitalix?
Replies: 121
Views: 103046

Sounds like another corporate orgy to me
:lol: :lol: :lol: :lol: :lol:
by SpyderCat
Tue May 06, 2003 7:09 am
Forum: Fans and Control
Topic: Influence of restrictions/underpressure on RPM & CFM
Replies: 28
Views: 10853

Re: Influence of restrictions/underpressure on RPM & CFM

CPU: AMD 2400+ with modded AX-7 heatsink in sucking mode, with duct, NO fan on the heatsink, folding like mad under 100% load. Panaflo A12L (@12volts: 1900RPM/24CFM/21 DbA) @9 volts sucks air through the heatsink, and dumps it at the rear, outside of the case. Air temp at case exhaust (= CPU exhaus...
by SpyderCat
Tue May 06, 2003 2:56 am
Forum: CPU Cooling
Topic: an easy life - XP 2400+ advice please
Replies: 18
Views: 4316

well... let me open up a can of worms. Swapped the mobo fan for a Zalman heatsink (as recommended). Just letting you know whats changed in the last week. Now I'm thinking this is just coincidence... but get this. My computer was overheating. The alarm went off so I shut it down (the CPU Core was ve...
by SpyderCat
Sat May 03, 2003 4:03 pm
Forum: SPCR's Folding@Home
Topic: We broke 100!
Replies: 48
Views: 24541

How do you run those things, they seem to lack mice, keyboard, monitor & harddisk? Boot off LAN? YES! It seems some boards can boot from a USB-drive... What OS (cause you need some network support)? Mostly Linux, connecting to a linux or Windows server How do you persuade BIOS to POST without a key...
by SpyderCat
Sat May 03, 2003 7:01 am
Forum: Fans and Control
Topic: Influence of restrictions/underpressure on RPM & CFM
Replies: 28
Views: 10853

Hi Dukla, Done some thinking... :lol: In an other post you wrote: Say you CPU is 80W (peak), then the basic aircooling theory says your temp rise (with 20cfm) is dt = (80 * 1.76)/20 = 7C Using the same formula on my case/CPU exhaust fan: Delta(T)=16 Heating power=64 Watts Formula: CFM=(power*1.76)/(...
by SpyderCat
Sat May 03, 2003 6:09 am
Forum: Fans and Control
Topic: Influence of restrictions/underpressure on RPM & CFM
Replies: 28
Views: 10853

Hi Dukla, A reasonable estimate of CFM might be obtained by using the PSU's Δ (T). More CFM --> smaller Δ (T) Right? At the moment I can't easily get a "PSU's Δ (T)" in "free-flow" condition. Still Δ (T) seems hold promise for getting CFM-numbers in real life situations. I retreat to...
by SpyderCat
Sat May 03, 2003 4:47 am
Forum: Fans and Control
Topic: Influence of restrictions/underpressure on RPM & CFM
Replies: 28
Views: 10853

Influence of restrictions/underpressure on RPM & CFM

First of all: I don't have a problem, just being curious. I'm trying to evaluate my current setup with measurements where possible, and educated guesses for those I can't take measurements on. Current setup: Room temperature: 20*C Case temperature: 25*C The case temperaure stems from HD-cooling, gra...
by SpyderCat
Wed Apr 30, 2003 5:04 am
Forum: Cases and Damping
Topic: Optimizing case airflow
Replies: 114
Views: 46281

Temperature of air 1cm from PSU fan - 40 Degrees C Temperature of air from floor case intake - 23 Degrees C Jen - in general your temps are OK, but only that. In my opinion the 40C 'intake to the CPU fan' is abnormal. Hi Dukla, Why are you talking about CPU-fan when the quote is talking about PSU-f...
by SpyderCat
Wed Apr 30, 2003 4:00 am
Forum: Fans and Control
Topic: Panaflo fans in euro zone?
Replies: 12
Views: 3468

which in my case might translate to: 78,85 EUR + 40 EUR shipping = 118,85 Halcyon Why are you shipping it twice? And why do you ship it so expensive the second time? The 78,85 EUR was with shipping included :wink: I have had two packages from Canada & USA. Both came without additional taxes. :lol: ...
by SpyderCat
Tue Apr 29, 2003 1:52 pm
Forum: Fans and Control
Topic: Panaflo fans in euro zone?
Replies: 12
Views: 3468

Re: Panaflo fans in UK

Hi, After quite a bit of searching the cheapest I've found for the Panaflos in the UK is: http://www.over-clock.co.uk/acatalog/Case_Fans.html Hopefully I'll be ordering a few myself soon :D :?: :?: Could somebody explain to me why a Panaflo A12L at £7.99 (shipping excluded) is cheaper than a Panafl...
by SpyderCat
Tue Apr 29, 2003 7:05 am
Forum: Fans and Control
Topic: (((Noiseblocker)))-UltraSilentFan,
Replies: 38
Views: 12191

Compared: NoiseBlockers S2, S3, Panaflo A12L, Papst 8412 N/2

I promised to give you my impressions of NoiseBlocker and other (low power) 80 mm fans. Papst 8412 N/2GL: Wires 30 cm, rpm sensing. NoiseBlocker S2 & S3 fans: Nice package, long wires with rpm sensing, comes with speed-control. Panaflo A12L: 2 wires, 30 cm long At 4.95 Volts: Papst drew 27 mA; airfl...
by SpyderCat
Sat Apr 26, 2003 3:09 pm
Forum: Fans and Control
Topic: Cooling Fan Challenge
Replies: 4
Views: 1788

Re: Reverse fan on CPU?

However, I'd just read somewhere that you might be able to cool your CPU more efficiently if you reversed the direction of the fan on the heatsink. Since the fan is sitting just below the PSU, then having 2 fans blowing in the same direction, I might be able to draw hot air more effectively from th...
by SpyderCat
Fri Apr 25, 2003 6:28 am
Forum: CPU Cooling
Topic: Ambient air for CPU cooling?
Replies: 18
Views: 5410

Is there any plastic that is thin and easy to mold when heated but will keep its shape when it cools down? When kids (and I) can work with this stuff, you should be able too :wink: http://www.martindalejmi.herts.sch.uk/our_work/year_4plastazote.htm and http://www.atlasortho.com/sub%20Products/Mater...
by SpyderCat
Wed Apr 23, 2003 10:10 am
Forum: The Silent Front
Topic: Expected temps with XP 2400 or 2500 from an XP 1600
Replies: 5
Views: 2387

http://www.bijlard.demon.nl/pics2/AMDtemps.gif source: Sudhian web-site Here you can see the power these CPUs transform into heat, and yes, the Thoroughbred 2400+ does run hotter than your Palomino. I suspect you could lower your case-temps a little bit. A cooler case would probably allow you to ru...
by SpyderCat
Tue Apr 22, 2003 5:34 am
Forum: Fans and Control
Topic: (((Noiseblocker)))-UltraSilentFan,
Replies: 38
Views: 12191

Has anybody found a source in EU that ships everywhere within EU? The German sites listed only ship to Germany, Dutch only to Holland, etc. I need a supplier who can send to Finland. regards, Halcyon http://www.dirkvader.de has a list with online-shops, and http://www.noisemagic.de ships to Finland...
by SpyderCat
Mon Apr 21, 2003 11:59 am
Forum: Fans and Control
Topic: (((Noiseblocker)))-UltraSilentFan,
Replies: 38
Views: 12191

Re: Excellent links!

10 days ago I ordered ... Once they have arrived wow SpyderCat - I thought NL was first world? You could get right across your country on a bicycle in 10 days: How do those guys deliver - the genuine snailmail :D Rub it in, Dukla, keep rubbing it in ! :( You can cross the country from east to west ...
by SpyderCat
Mon Apr 21, 2003 9:02 am
Forum: Fans and Control
Topic: (((Noiseblocker)))-UltraSilentFan,
Replies: 38
Views: 12191

Re: Excellent links!

yes the specs look very good (a bit too good for my liking) that is why I am asking about them, they dont claim to be the actual manufacturer, so where do these fans come from? Hi Rod M, 10 days ago I ordered a few S2, S3 (NoiseBlocker), some Papst fans, and I have a few Panaflo's A12L's. Once they...
by SpyderCat
Sat Apr 19, 2003 3:13 am
Forum: Fans and Control
Topic: Panaflo 80mm L1A available in Europe
Replies: 10
Views: 3569

Bump

Bump, for those that can read...
by SpyderCat
Wed Apr 16, 2003 2:42 pm
Forum: CPU Cooling
Topic: Has anyone tried the Nexus KCZ-2700
Replies: 2
Views: 1711

Re: Has anyone tried the Nexus KCZ-2700

After reading 2 reviews, I'm quite curious to hear testimonials from people who've tried it. I know Mike C said that they'd be reviewing it in the coming months, but I'm piecing together some components and am considering this to cool an Athlon XP 2400+. ..... I'm interested to hear from anyone who...
by SpyderCat
Sun Apr 13, 2003 3:07 pm
Forum: Fans and Control
Topic: Useful links
Replies: 0
Views: 877

Useful links

For those that seek a better understanding of what make fans work, this might be an interesting link to a Powerpoint presentation
http://www.nepss.org/presentations/Fanology.ppt

Regards, Han.
by SpyderCat
Sat Apr 12, 2003 10:57 am
Forum: Power Supplies
Topic: 2nd PSU poll: please VOTE AGAIN!
Replies: 117
Views: 43641

Yes, for now the Nexus is quiet enough.
When it becomes the noisiest part in my PC I will deal with it.
by SpyderCat
Sat Apr 12, 2003 1:58 am
Forum: The Silent Front
Topic: Single malt ducting
Replies: 1
Views: 1159

Re: Single malt ducting

I reversed the flow of the cpu fan to suck out towards the panaflo at the rear. The 3 case fans are controlled by a temperature sensor in the duct. The cpu fan is temperature controlled by a probe on the heatsink. The cpu heatsink is only a Thermaltake 6Cu with stock fan but is fairly quiet with th...
by SpyderCat
Fri Apr 11, 2003 1:02 pm
Forum: Fans and Control
Topic: Pressure developed by 80 mm axial fans
Replies: 5
Views: 1843

Here, from the Cooling-forum (posted just a few minutes ago) :lol:
jinu117 wrote:Oh... for radiator, I found putting fan in front of and behind radi instead of on either and running it a lower speed decreases noise level and improved performance.
He speaks of 2 fans "in tandem" with a fence between them :P
by SpyderCat
Fri Apr 11, 2003 12:44 pm
Forum: Fans and Control
Topic: Pressure developed by 80 mm axial fans
Replies: 5
Views: 1843

I want to do some tests with fans "in tandem" (behind each other), to see if my feeling is right. You mean "The static pressure capacity of two fans in series can be doubled at zero air flow condition, but do not increase the airflow in the free-air situation. An additional fan in series increases ...