dual pelts?
 

i was just cruising around directrons site and i was looking at the maze series of waterblocks and i noticed that the picture had 2 40 X 40mm peltier coolers on it. is this possible? wouldnt it make a huge ass hot spot somewhere?

here the link
http://www.directron.com/maze22.html

It's true, it's true...

2 40mm pelts on a Maze 2-2 (Maze 2-1 = 1 pelt).
176 Watts each.
A massive/expensive power supply is required though, and that's the big limitation...

The heat is transferred to the block via a cold plate, so the hot spot isn't an issue.

hey thanks for clearing that up for me. yeah 350 watts just to power 2 pelts on a cpu block is insane. that would need its own huge ass power supply just to run it.


and speaking of power supplies...i was reading up on hooking multiple power supplies together and i would appreciate feedback from anyone. good? bad? dangerous? stupid?

IT has been done and documented on several sites, including this one. Mostly it is good for a cheap alternative to getting an actual committed PSU for the pelts. Personally, I would go out and find a good quality dedicated Power Unit and run pelts that way. But then again, I dont use pelts so what do i know about them :)

One thought is to get ahold of one guy here that builds linear power units from scratch......cant remember what his handle is at the moment though. Sorry.

All true, and the other issue is the power consumption.

If, for example, you have a wife that nags about you leaving a light on when you leave a room, this is a good way to get back at her...:p

Seriously, 350 Watts is a lot. An alternative is a temperature controlled power supply (and I will build one) that keeps the CPU at the same temperature all the time, regardless of what it is doing (idle/full load).

I'll put together an article on it (don't hold your breath though, it'll take time).

You can also purchase such a PSU, but expect a $200+ expense.

yeah...im kinda trying t avoid paying that $200+ for a PSU. sorry but im a cheap bastard:) but right now, i have a 250 watt ATX PSU, and i was able to snag 2 250watt AT PSUs from a computer class at my high school before they dumped them. so....correct me if im wrong, but 3 times 250 equals 750 watts to play with right? and i was reading the procooling article on it, along with the original one that was geared more towards using it for radio purposes. by using the 5+ leads from each supply i can get the 15.2 volt 24amp i need for the pelt. those articles didnt mention anything about mixing AT and ATX supplies together. trial by fire i guess:(

jtroutma: i would really appreciate it if you could remember the handle of the guy that make the linear PSU. plus a little more info on them as well (ive heard of them, i dont know what the difference between switching and linear is)

Errr... yes and no!

Every power supply is rated for the total power that it puts out. These are spread over the + 3.3V, +5V, -5V, +12V and -12V. Every PSU is different.

P=VI (Power=Voltage*amperage)

You have to check your PSUs for their rating. You shouldn't have a problem hooking up 3 PSU, to make 15V, but your amps are still limited at the same rating (35 amps?) of one of them.

Personally, I don't like using PSUs, because they are too bulky, and because they are made to provide 5 different voltages, where I only need one. Being a cheap bastard myself, I'll make my own. :cool:

...but it will work.

You can link AT with ATX power supplies just make sure all are ungrounded cept one.
Its pretty safe to use linked power supplies as long as you cool it well and operate at around 80% of their max capability.

that would be me.

here's the thread link clicky

damn these forums are fast!

ok more stupid questions.....
how do you go about making your own supplies? (probly way beyond my oakie ass soldering skillz)

and another odd thing i found on directron, load resistors. i somewhat get the concept behind them, but i would like to know exactly what they do and the purpose of them on a power supply. directron sells theirs for about 13 bucks, but in my allied electronics book i find it for $3.15. wtf? its a 25watt 1 ohm wirewound resistor for the electronics experts out there.

and to bigben. how did you get a xp2200+? are those even released yet? or is it a dev chip?

edit: hey i looked at that thread for the linear psu's. those things are friggin huge! i doubt ill have room to put something like that in the future case im making. (sorry, but i still want to bring it to lan parties without breaking off a capacitor or 2 in the car)

The 2200+ is coming out Monday... but I'm still going to wait a little while.

The resistor is just a high wattage resistor, 1 Ohm. Many cheap alternatives can be found, and $3.xx sounds reasonable to me! It's used across the 5V line to put a load, so that the PSU gets out of its "sleep-mode".

hey i just want to say thanks to everyone. this is the best forums ive ever been on

ok last stupid question...
what about using a 5V from 1 psu and a 12V from another psu. they are different brands of psu's but same about (250 watts) i havent tried doing this yet, but if this would make like 17V at 35A that would be overkill. please tell me if my math is wrong her and explain what's right. if this doesnt seems to dangerous to do, ill try putting a meter on it and see what the reality V and A is. thanks again

Using 5V from one PSU and 12V from another is OK to give you 17V. But you won't get 35A.
The 5V is usually around 30A but the 12V is only about 10-15A and that would restrict your setup to 17V 10-15A since you are connecting them in series.

Just choose the PSU with the highest amperage on the 12V. To get the most amps out of your setup.

Good luck

Dix Dogfight is right: the amp rating you'll be able to use is the smallest of either the 5V line or the 12V line. Just look at the rating on the power supply. Also, try not to use a full load: if you need 35 amps, then shoot for a supply setup that will give a little more than that, like 15-20% more: it'll keep the PSU from heating up, and wearing out prematurely.

Make sure you use MBM to monitor your CPU temp, and allow it to shut off your computer if the temp gets too high. You would do well to do this, since your PSU setup may not be 100% guaranteed reliable.

See here:
http://www.subzerotech.com/articles/.../pgs/pg1.shtml

on how to turn a PSU into a half height PSU.

Might help...:D

ok so.....how would i go about cranking up the amps on an old ATX psu then?;) ;) ;)

and btw that slim psu is pretty sweet, i might need to do that to the psu's for my case im gonna so i wont have a 3 ft case ( i would like it to be about 20" tall max, but im shooting for a height of about 17")

check mpja.com for some cheap 5v psu's with lots of amps. Then just buy 3 or 4 to get to 15v or 20v

i already have 2 250watt AT psu's and my ATX psu im using right now (i think its 250watt....)

the goal is to get 15V at 24A some how for the 226watt pelt im gonna get. after looking at the sticker on one of the AT psu's, it says 5V @24A. im gonna assume this is the same amount of amps as any other supply, give or take a few. so i just use the 5V leads off all 3 psu's and i should have my 15v 24a right?

ive read over the procooling.com and antennex.com articles serveral times. i really hope this is right because im gonna seriously start messing around with this stuff tomorrow.

If you don't know, then you shouldn't try it. PSU's can be dangerous (read deadly). Adding amps is not so easy.

awww then whats the fun in that if its not dangerous? j/k

so to be serious here for a second, what the best way to drain a unplugged psu. i've heard of just plugging in a fan or something and turning the switch on and off. but that seems too easy for some reason....ive also heard of shorting out the capacitors, but this seems dangerous.

what is the best way to drain a psu?

throw it in the neighbor's pool.:evilaugh:

a pool huh?

and i quote from the oakie rigging god himself....Afroman

"water+compuer=bad" the Fuxx0red Mods section

http://www.afrotechmods.com/ (yes he got his own domain now. he's not on the carnegie melon webspace no more:))

be sure to read his recent article involving the overclocking of UV lights to give you a tan.:cool:

at least afrotech can have a better site design and better articles than tom's can

ROTFLMAO, but then you have to drain it of water...