Good temps for 156w TEC?

[TheGhengisKhan]

I know, I know, I should have gotten a 226w TEC, but funding is seriously low, and I was able to get the 156w one free, and had a couple AT PSU's sitting around to parallel for power. But, I'm seriously impressed with the temps I'm seeing. My temp probe, which is sitting right next to the die reads about 3 degrees cooler than what MBM5 is showing me, here's a shot of my mbm5 dashboard (ignore the 3.3v reading, I can't seem to get it to read the correct voltage for some odd reason)
http://www.ghengis-khan.com/Images/mbmshot.gif

I'm thinking of picking up a 226w TEC once I get my income tax refund this year, but what kind of temp drop can I expect if I go with it and a MeanWell PSU?

[kayl]

have you tried many different vcores
this last week i have been playing around with a 130w peltier in the maze4-1

at vcore 1.7v i got 11x200 and 240c full load and 18oc idle
at 1.75 though my temps were about 30oc

i have a 226 peltier just waiting for the powersupply to arrive saturday

[TheGhengisKhan]

Yes, I've tried lowering my Vcore, but any lower than 1.85 and I start getting some instability in some of the games I play (BF1942, UT2k3, SWG)

[davekusa]

Swiftech MCW5000-PT (226 pelt) 6-8C idle 12-15C loaded.
Alltho I think the P4 puts out less heat.

P4 2.6 @ 1.6V

I've seen people with lower temps running a 226w pelt.
All depends on you pump and rad.

[Silver]

Seems to me to be about right on the 156. I come up with approximately 90w effective. Bunch of variables but in the ball park. I would look for effective 127w or so on the 226w at 12v. Again a number of variables but ball park. Rough estimate on the tec would be 226 x .75 (actual volt/amp applied)x .75 for thermal loss (insulation, etc). This has served me well. Not very scientific but allows me to ball park. A single 226w at 13volts using an all copper maze on evap cooling would take my 2.8c to -temps at idle and roughly 38c or so under load at a tad over 4ghz. Extended load times would put the processor into failure. Never exceeded 1.7v on the p4 as the tec could not handle the heat.

On the xp2700, dual 156w tecs on evap would idle at -18 or so. Dual 175 watt tecs would have been more effective in the application and I would have expected better results. Not necessarily in lower idle temps but in better load temps, thus a higher oc.

[TheGhengisKhan]

Thank you for all your help, but I think I'm going to migrate away from the TEC idea, seeing as it looks like I'm going to be getting a couple thousand $$ back from my income tax, so it looks like I'm going to just go all out and switch it all over to phase-change.

[TheGhengisKhan]

Actually, I just thought of something. Would a TEC perform better if the hot side was cooled by chilled water? Say I was to gut a small freezer, and use it to cool the liquid (anti-freeze, or whatever) that runs to my waterblock now. Could it possibly cool as well as a standard direct-die phase-change if I leave the TEC in place under the waterblock?
PS. the freezer I'm talking about has a label that says 20,000 btu's

[davekusa]

mini fridge will not keep up with the heat ouput of the pelt+cpu.

Been there too. mini fridge is ment to keep things cold not to cool things down. However if you get a kick ass water block and chit can the pelt. I think you might be able to get some good temps.

There are a quite a few people doing this but i don't know what kind of temp they are getting.

[kayl]

hey i found when i ran my 130w tec that the water flowing into the radiator was pritty hot, im gonna try a second radiator in parellel that should know a few degs off the system

[TheGhengisKhan]

Originally posted by davekusa
mini fridge will not keep up with the heat ouput of the pelt+cpu.

Been there too. mini fridge is ment to keep things cold not to cool things down. However if you get a kick ass water block and chit can the pelt. I think you might be able to get some good temps.

There are a quite a few people doing this but i don't know what kind of temp they are getting.

I'm not talking about one of those college refridgerators like I've seen several people talking about on here. I mean a true Freezer! Basicly a smaller version of a deep-freezer. Something like this:
http://www.ptli.com/testlopedia/images/Freezer-small.JPG

but gutted so the coils are submerged in the coolant that runs through my system.

[kayl]

Originally posted by Silver

On the xp2700, dual 156w tecs on evap would idle at -18 or so. Dual 175 watt tecs would have been more effective in the application and I would have expected better results. Not necessarily in lower idle temps but in better load temps, thus a higher oc.



Duel tecs with cold sides working together or like a peltier sandwich or somehting one cooling bottom side pcb one cooling top side

[lclark2074]

what is the size of compressor

[Silver]

Originally posted by kayl




Duel tecs with cold sides working together or like a peltier sandwich or somehting one cooling bottom side pcb one cooling top side

Dual opposing on a vericle cold plate.

[davekusa]

oooo a freezer. ya that should work. search the threads there was someone running a set up like that had really killer temps.
Thats just a lot of space to take up.

I was messing with coolant water mix for the sub zero temps and the stuff was like sludge. You may want to try windshield washer fluid.

Try both and see what works better. keep us posted.

[TheGhengisKhan]

for coolant, I was thinking of using an anti-freeze/washer fluid mix. And the freezer would be gutted, and the coils submerged in the coolant res.

[davekusa]

ew. I don't know about mixing that stuff together????
I am trying somthing with new long lasting high milage gold coolant. It seems to be a bit thinner. I will let you know how it looks after it sits outside for a while. Might be a bit easyer on the pump.

[kayl]

Originally posted by TheGhengisKhan
for coolant, I was thinking of using an anti-freeze/washer fluid mix. And the freezer would be gutted, and the coils submerged in the coolant res.



hey you wonldnt happen to know of a site to build something like that system you talked about, im very interested

[davekusa]

I really think your better off with a prometia case.

unless you have the space and money for a mini freezer

[TheGhengisKhan]

Mini Freezer I can go pick up right now for $75
Space? What else am I going to do with the rest of the room my computer is in? :D

[TheGhengisKhan]

OK, it's official, I'm going to buy that freezer tomorrow night. I'll be sure to take as many pictures as I can (I'll have to pick up a couple of disposable cameras) and write up a walk-through of what I did and post it here, kinda like people are doing with mods in the Alternative Modding section. Maybe it'll even help attract some more people over to the Extreme Cooling way of life ;)

[davekusa]

seems that the gold coolant is allot thinner in the sub zero temp than the green.

good luck

[kayl]

you will have to get the 226w tec now with that type of cooling you will be able to the real benifits of extrme cooling:attn:

[TheGhengisKhan]

I actually did some thinking, and I'm not going to buy that freezer tomorrow. It's old (who knows how old it really is), and I can buy a brand-new one for only $125 at Sears, that I know will work for a long time. Plus I've made some big plans for the new computer that I am going to build, so I'm thinking this computer is just going to be fine the way it is, from here on out. Don't worry, you will still see the freezer unit go into use, but it will be included with a whole brand new PC that I'm going to start building.

PS, Isn't it wonderfull when your spouse gets a good paying job and your money actually becomes your money again? ;)

[kayl]

personally i would buy a secondhand freezer, has to be one of the bigger freezers you can find like a deep freezer.
then you know you have max cooling as you can go. you can power the thing on and off seting it to a desired temperature

also i recond you will build some another cooling system to replace this one before that freezer dies

[TheGhengisKhan]

I'm going to be building the phase-change into the case of the new computer, so I plan on building it so that it stays the way it is, and I want it to last as long as possible.