View Full Version : WC+TEC122W +Duron750mhz@954 1,7Vcore=30C what the hell is that??
so i just plugged my peltier 122W on my waterblock everything is very well closed wih silicon and cell foam against condensation but the probleme is my idle temps is 30C(85F) .When i use my Watercooling alone i have 32C(87F) so what s wrong with my peletier i m using an Enermax 550 W 25A max and 28A peak so please help me cause at least i was wondering to hit 0C but maybe something is wrong
i have an ASUS A7V133 bios 1004
even duron 750@750mhz 1.6Vcore i have 30C idle so please help
dasouthernocer
03-10-01, 09:36 PM
Well the problem could be that a Duron would be too much for that peltier. Because you are probably only running it on the 12V circuit and it's probably rated for 24V. so you are only getting about 61Watts. Peltiers don't work so great with AMD's. But if you got a 24V power supply it might do better. If it is a 24V peltier. Usually one's that high are.
-dasouthernocer
dasouthernocer (Mar 10, 2001 09:36 p.m.):
Well the problem could be that a Duron would be too much for that peltier. Because you are probably only running it on the 12V circuit and it's probably rated for 24V. so you are only getting about 61Watts. Peltiers don't work so great with AMD's. But if you got a 24V power supply it might do better. If it is a 24V peltier. Usually one's that high are.
-dasouthernocer
no this peltier is rated 122W 15.6V and 14A so i don t think that this one is not enough i think that it power more than 90W@12V
your "Watercooling alone" temp is kinda high (unless your room is 80+,
I'd guess radiator, pump, but most probably radiator
be cool
my room temp is 16C i dont know how much in Fahrenheit :)
but i dont know what s wrong with my watercooling
here is the picture of what my watercooling looks like [img="http://www.aquastealth.com/images/customer1.jpg"]
the picture is not mine but i m using the same watercooling kit
DOUBLE the radiator size, be sure its intake (or exhaust) is not shrouded, try to set it up so the case air is exhausted through the radiator
then take the pump out of the resivour
then you'll probably go to a bigger pump
properly sizing the watercooling components for an Athlon plus TEC is not "plug-and-play", unless everything is oversized to begin with
be cool
The night before last, I set up my 10x100@1.85 Duron with a 156W
at 15.1V peltier with air cooling using the big-un Swiftech MC-462A.
To be on the safe side, I ran it at 13.7V, yielding approximately 137W. With a room temp of 20C I was able to hold the core at 20C idle and it rose to 26C running Prime95. The copper baseplate of the MC-462A was running 45C, well within the 65C maximum cold to hot differential. I too was disappointed, expecting lower core temps. Admittedly, these temps were 10C lower than I usually experience. In my honest opinion, when you get up to the 50W and greater CPU range, water cooling is the only acceptable method for cooling a peltier. I don't know why you did not get better results as I have not dealt with a water cooled system yet.
Hoot
rusty (Mar 10, 2001 09:40 p.m.):
dasouthernocer (Mar 10, 2001 09:36 p.m.):
Well the problem could be that a Duron would be too much for that peltier. Because you are probably only running it on the 12V circuit and it's probably rated for 24V. so you are only getting about 61Watts. Peltiers don't work so great with AMD's. But if you got a 24V power supply it might do better. If it is a 24V peltier. Usually one's that high are.
-dasouthernocer
no this peltier is rated 122W 15.6V and 14A so i don t think that this one is not enough i think that it power more than 90W@12V
I think your math is a little out, 122 W / 15.6 V pelt at 12V will only give around 72W.
It works like this; using Amps = Power/Volts 122W / 15.6V = 7.8A so using Ohm's law (Resistance = Volts / Amps) 15.6V/ 7.8A = 2 Ohm. so the resistance of your pelt is 2 Ohm, therefore 12V / 2 Ohm = 6Amp so your Pelt will pull 6 Amp at 12V, 12V x 6A =72 W.
This is surely your problem, a duron at 1GHz will produce about 60W as a guide your peltier should be rated at twice the heat output of your cpu.
I think your math is a little out, 122 W / 15.6 V pelt at 12V will only give around 72W.
It works like this; using Amps = Power/Volts 122W / 15.6V = 7.8A so using Ohm's law (Resistance = Volts / Amps) 15.6V/ 7.8A = 2 Ohm. so the resistance of your pelt is 2 Ohm, therefore 12V / 2 Ohm = 6Amp so your Pelt will pull 6 Amp at 12V, 12V x 6A =72 W.
This is surely your problem, a duron at 1GHz will produce about 60W as a guide your peltier should be rated at twice the heat output of your cpu.
WOW i think that u are right:) are u a physics teacher no it s just a joke
ok then i have to change my peletier to a more powerfull one
but i have a small question how did u find that a duron 1 ghz produce 60W of heat
can you give me the method please
so a TB1400mhz how much heat will he produce
thanks a lot
is it Vē*f*0.0181
V = Vcore
f =proc frequence in MHz
??
This works great, though I'm not certain whether it represents at idle, full load, or somewhere in between.
http://www.overclockers.com/tips166/radiate.zip
Hoot
Hoot (Mar 11, 2001 08:45 p.m.):
This works great, though I'm not certain whether it represents at idle, full load, or somewhere in between.
http://www.overclockers.com/tips166/radiate.zip
Hoot
ok great thanks man :)
LimeyGreg
03-12-01, 12:24 AM
You don't need to change your TEC, just run it at the rated voltage and current, although it is probably cheaper to change it than to buy a dedicated 15v supply.
Bear in mid that that TEC actually consumes over 200 watts based on you specs.
LimeyGreg (Mar 12, 2001 12:28 a.m.):
You don't need to change your TEC, just run it at the rated voltage and current, although it is probably cheaper to change it than to buy a dedicated 15v supply.
Bear in mid that that TEC actually consumes over 200 watts based on you specs.
ok but any1 know how to change my PSU to a rated 15V??
dimmreaper
03-12-01, 05:44 AM
Badger (Mar 11, 2001 03:40 p.m.):I think your math is a little out, 122 W / 15.6 V pelt at 12V will only give around 72W.
It works like this; using Amps = Power/Volts 122W / 15.6V = 7.8A so using Ohm's law (Resistance = Volts / Amps) 15.6V/ 7.8A = 2 Ohm. so the resistance of your pelt is 2 Ohm, therefore 12V / 2 Ohm = 6Amp so your Pelt will pull 6 Amp at 12V, 12V x 6A =72 W.
This is surely your problem, a duron at 1GHz will produce about 60W as a guide your peltier should be rated at twice the heat output of your cpu.
Actually badger. Peltiers when running at there maximum voltage draw about 60 percent more electricity than they pump.
So a 72W peltier draws about 120W of electricity.
The Qmax (pumping ability at Imax and Vmax) to current ratio is not linear either. A peltier running at 80%(.8 * Imax * Vmax) of its maximum current may only provide 75% of its Qmax.
Another common misconception is that a peltier only puts a heat load equal to it's Q
(pumping ability of the peltier at the current you are providing, not necessarily the Qmax) on the heatsink/waterblock. It actually puts a heat load of the current being used plus the Q on the heatsink/waterblock, because all of the current is converted to waste heat in the peltier process. A 72W peltier(at it's maximum current) puts 192W of load on the heatsink/waterblock, wether the CPU generates 2W or 50W oh waste heat.
Jeff,
I stand corrected ! you are of course bang-on.
Funny thing, I'm using the same peltier as Rusty 122W 15.6V and 14A together with a 72W on the gfx card and at 15V they only pull 16A combined, should be more like 20A according to the ratings. maybe my Ameter aint so accurate?
dimmreaper
03-12-01, 05:45 PM
Badger (Mar 12, 2001 05:40 p.m.):
Jeff,
I stand corrected ! you are of course bang-on.
Funny thing, I'm using the same peltier as Rusty 122W 15.6V and 14A together with a 72W on the gfx card and at 15V they only pull 16A combined, should be more like 20A according to the ratings. maybe my Ameter aint so accurate?It may be a limitation of your power source. It wouldn't be the first powersource rated for more than it can handle under constant load.
hey guys can u tell me please how do you modify your PSU to have it @15V thanks
You don't want to do that. It's awful hard on the HDDs and other devices that call for 12V. In some PSUs there is a trim pot for adjusting the +5V output by means of the switching circuit duty cycle. All the other voltages are effected by that duty cycle. If you adjust the PSU for what increase you want from the 12V output, all the other voltages will be proportionally higher also. Perhaps in the better supplies each output has individual, post bulk, regulation, but I've never had a good PSU, so I can't say that for sure.
Hoot
Hoot (Mar 12, 2001 06:59 p.m.):
You don't want to do that. It's awful hard on the HDDs and other devices that call for 12V. In some PSUs there is a trim pot for adjusting the +5V output by means of the switching circuit duty cycle. All the other voltages are effected by that duty cycle. If you adjust the PSU for what increase you want from the 12V output, all the other voltages will be proportionally higher also. Perhaps in the better supplies each output has individual, post bulk, regulation, but I've never had a good PSU, so I can't say that for sure.
Hoot
yes but i ll modify an enermax 350W and i ll put it on the Peltier alone and the 550W i ll leave it for the other hardware mobo,cpu......
dimmreaper
03-12-01, 07:14 PM
Hoot (Mar 12, 2001 06:59 p.m.):
You don't want to do that. It's awful hard on the HDDs and other devices that call for 12V. In some PSUs there is a trim pot for adjusting the +5V output by means of the switching circuit duty cycle. All the other voltages are effected by that duty cycle. If you adjust the PSU for what increase you want from the 12V output, all the other voltages will be proportionally higher also. Perhaps in the better supplies each output has individual, post bulk, regulation, but I've never had a good PSU, so I can't say that for sure.
HootHey Hoot. Under MBM all my power rails read a hair under their rated voltage (12V reads 11.89V). Think I can tweak my PSU to get it just right? Think a little extra voltage (less that 1/4V) would have the same effect as raising the VIO on my MoBo? I ask because my MoBo has no VIO adjustment, but I'd like to give it a smigin more voltage for extra stability. I could see it being a problem though (harddrives ect.), so I think I'll tweak her for a half a hair over rated voltage (12.05V).
Sure can't hurt to open up your PSU and have a look inside. My guess is they probably don't have a user accessable adjustment since a fixed resistor shaves a few pennies off the cost versus a trim pot, but you never know.
Hoot
ok so now i have to modify de voltage of the PSU or the amp??
because at 15V an enermax 350W pull 9.6A and my tec need 14A
Ideally you need a power supply that will give 15 V and is rated for at least 14A. As long as you give your pelt 15v the current will look after itself.
I'd be surprised if you can get your enermax 350W PSU to give you 15V and if it did you risk damage to other hardware that runs off the 12V rail. Also if it's not rated for 14A you will overload the PSU.
Your best bet is a dedicated power supply for the pelt. I use a radio ham psu rated for 25A with voltage adjustable between 9 and 15V.
Badger (Mar 13, 2001 03:09 p.m.):
Ideally you need a power supply that will give 15 V and is rated for at least 14A. As long as you give your pelt 15v the current will look after itself.
I'd be surprised if you can get your enermax 350W PSU to give you 15V and if it did you risk damage to other hardware that runs off the 12V rail. Also if it's not rated for 14A you will overload the PSU.
Your best bet is a dedicated power supply for the pelt. I use a radio ham psu rated for 25A with voltage adjustable between 9 and 15V.
ok but when i said i ll modify i 350W PSU i ll put it only for the peltier the ohter stuff i ll leave the 550W but i wana know where did u get your PSU and how much it cost thanks
i had made a new test tonight
i plugged an Enermax 550W 12V 25A for the Peltier only and another Enermax 550W 12V 25A for my system but the CPU temp is still 30C no change at least i know that 1 power supply is not the probleme i ll try to modify one at 15V to see what ll hapened
LimeyGreg
03-13-01, 10:48 PM
You will have a tough time modifying your psu for 15, you'll need the cct diag and you'll need to change some components. Even then, it's not the 12v cct that is rated at 350 watts - it's the whole psu, one of the +5v rails is also a high current line. You really need a dedicated adjustable supply that is capable of producing the required current.
Check out this article on Peltiers - it's got some nice graphs in it.
LimeyGreg (Mar 13, 2001 10:48 p.m.):
You will have a tough time modifying your psu for 15, you'll need the cct diag and you'll need to change some components. Even then, it's not the 12v cct that is rated at 350 watts - it's the whole psu, one of the +5v rails is also a high current line. You really need a dedicated adjustable supply that is capable of producing the required current.
Check out this article on Peltiers - it's got some nice graphs in it.
ok but anyone can tell please where can i find a a dedicated adjustable supply and how much it cost
thanks
dimmreaper
03-14-01, 12:54 AM
rusty (Mar 14, 2001 12:42 a.m.):
LimeyGreg (Mar 13, 2001 10:48 p.m.):
You will have a tough time modifying your psu for 15, you'll need the cct diag and you'll need to change some components. Even then, it's not the 12v cct that is rated at 350 watts - it's the whole psu, one of the +5v rails is also a high current line. You really need a dedicated adjustable supply that is capable of producing the required current.
Check out this article on Peltiers - it's got some nice graphs in it.
ok but anyone can tell please where can i find a a dedicated adjustable supply and how much it cost
thanksI think radioshack sells some 13.8V 15A models. But I don't know if that is what you need. Your best bet will be to build your own.
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