best 80mm fan??

[peltit]

hey all...im new here. :)

anyways, got a bit of a project going...

trying to air cool a pelt on an xp2000...sounds insane i know :P

i've got a thermalright AX7 and a fan pushing 350cfm through my case and a 172w pelt..which will be running off 2 300w enermax psus as soon as i get a fan, as the subject says, which one is it?

i thought it'd prolly be a delta fan. any recommendations?
please inculde specs :)

btw. this if for the heatsink.

and yus. im going to take all precuations for condensation etc.

cheers

[Ragnor]

Welcome to the forums :)

First in my opinion you're wasting your time trying to air cool a pelt.. better to save up for a LiquidCC water block, ehiem pump and get a rad (old car heatercore) from a car wrecker....

In terms of most cfm from an 80mm fan...

/Troll mode

We have an expression round here

"STFW First" = Search the f***ing web first

A quick 10sec search later..

Make: Delta:
Model: FFB0812EHE
Size: 80x80x38
Voltage: 12
Current(amps) 0.90
RPM: 5700
CFM: 80.16
Air Pressure 20.63
Noise (dbA): 52.5

/end Troll mode

Hope that helps ;)

[_N_]

if you try using anything more than a 40W peltier with a heatsink, it will heat it's self up so fast and burn out before you will even get to bios to check the cpu temp. ;) :rolleyes:

[GooGlo]

You WILL kill the cpu. No question.

If you attemot this on air you will waste many hundreds of dollers and a lot of time only to have it blwo up in your face 20 seconds after you turn it on.

Air just doesnt work with 250watt loads, (which it will be). Unless you had 25000cfm of super cold air moving through.

but anyway, water is the way to go. Its cheap(ish) if done right, is much more impressive than air, and will be MUCH more quiet than that delta fan.

[peltit]

the heatsink is 80x80..

it should be enough to cool the hot side of the pelt. ive been over this with styles...

atm my temps on my xp2000 are 28idle..stock hsf..and 35 full load :D

[peltit]

thanks ragnor btw :)

i did actually think it was the delta 5700rpm fan, just wanting opinions! :p

thought the vantec tornado was pretty good too..any higher rpm fans ? for more air pressure?

[GooGlo]

I assume you will be overclocking? (why else would you be using a pelt...) If so, then you will be raising the vcore, That this will end up putting out around 250watts of heat. MUCH more than your pathetic AIR cooling can deal with. :p Seriously, it wont work.

Apart from the whole not working thing, WHY??

[Volodkovich]

well, the vantec tornados are a little more powerful (i think i read 83cfm or something)...but good luck trying to find on in nz..i'd say go for the delta.
Mentioning this, i am going to try my 80watt pelt on my celeron soonish...if i get it going before you i'll tell you how it went. Im going to start out running it on 5v, just to make sure it doesnt overheat. You are not going to be able to dissapate the heat of a xp2000+ and a 172watt pelt with aircooling. Last time i heard, 80watts is the max for aircooling, and even that is real dodgy...but good luck anyway...and be careful, im sure some of you know ive been part of a little accident with a peltier before...and it didnt take long to bust a 80watter either (say 20 seconds)

[p01s0n_p1e]

hehe-accident,the eagle made it out alive...just!

anyway, i cannot stress it enough to run it on the 5v rail at first, this was my reason for bustin the 80watter, run it on the 5v first!!

also, if you can somehow try and simulate the heat coming off the peltier and cooling it with the heatsink+fan, before you try the pelt. i saw this done once when some guy was reviewing heatsinks, and instead of putting them on his cpu, he made a simulated cpu out of resisotrs or something to create heat.

[Binky Stunt Cat]

/me votes for Vantec Stealth!

[Wibber]

yeah binky that'd keep it plenty cool, while its off :rolleyes:

[Humantuckshop]

Well, there is the ThermalTake 80mm SmartFan. Max output of 75.7 CFM @ 4800RPM - 48dBA. Although the actual max RPM on mine is 5200RPM.........
I think they're about $35 and they are manually adjustable, and they also come with a temp probe so the fan speed automatically increases as temp increases, if you want to use that function that is.........

[p01s0n_p1e]

hehehe
*imagines fan spinning at 8000rpm+ caus of probe on hot side of pelt* heehee

i wonder, if you put the probe on the cold side, would it even spin the fan?

[SecretSquirrel]

Actually, PPie...my Volcano 6Cu+ fan used to increase with load, and shot its way up past 8000rpm...noisy b1tch though :/

Thats why its at 7V now, but now I have a tunneling sound, seeing as its got a duct!

I need some way of muffling it I think

[GooGlo]

If you run the pelt at 5v you will kill your cpu in under 10 seconds. If you run it at its rated spec you may be able to get it going for allmost a minute :eek:

Ignore poison pie, If you follow his advice you will fail.

Volodkovich, If you start out running at 5v, your CPU will overheat and die. For someone who is so fanatical about extreme cooling, you have no idea.

[Volodkovich]

aye? wat r u on about?

if you run a peltier at 5v, it wont pump 172 watts, it'll end up pumping something like 80watts, which is alot safer than 172watts.
I do not see how a cpu will "overheat and die" with the equivalent to an 80watt pelt on it...compared to a 172w pelt.
You seem to think u know what your talking about...yet you say his cpu will "overheat and die" however, you do not explain, why, or how this will happen.
It'll be alot safer aircooling an 80watt pelt than a 172watt one!

[ktulu]

ok, for a start, I don't think you'll find that's it's a linear relationship. If that's the case there's a chance that it's only doing 50W. If the chip is pushing out 70W then the peltier isn't going to keep up with the heat generated by the CPU... hence it will heat up and die. I'm not claiming to know anything about pelts here (never used one)... but physics is physics (remember that the peltier doesn't move heat like a copper plate... it used electricity to move it from one side to another).

[Volodkovich]

i see your point, but i have run a 80watt pelt at 5v, and it still got damn cold...
it all depends on what peltier it is to how much heat it pumps...I assume it would pump in the region of 80watts. He would have to test it of course.
Ktulu u were right about peltiers not being linear....

[GooGlo]

ktulu is spot on. It isnt linear and it will maybe pump about HALF the heat his CPU is producing. When a pelt is undervolted and cant pump enough heat then it acts as a very effective heat insulator. When a pelt is not being powered it DOESNT conduct heat. At all.

Also, i assume you will be modifying the heatsink in some way to get some decent claping pressure between the cold plate and pelt?

[Volodkovich]

of course...im clamping it to 300psi

[GooGlo]

That last one about clamping pressure was more directed towards peltit, but its good too see you do know something about the subject :p