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post #11 of 21
Thread Starter 
So after messing about a bit with this I have decided it is worth going forward with but I want to do it reasonably properly tongue.gif I plan on breaking the block down so I can:

1.Get the proper screw length.
2.Lap the mid plate and drill a small hole for thermocouple insertion to monitor temps via K-Type thermocouple.
3.Clan all surfaces and re-tim the lot.
4.Drill a small hole in the base for thermocouple insertion to monitor temps via K-Type thermocouple.
5.Re-assemble and insulate all parts properly.

There is no real good way based on the fact that the hot plate is so thin to use a thermocouple for those temps so we will have to rely on water temps for that.

In the end I'll have:

1. Ambient temps.
2. Hot side water temps.
3. Mid plate temps.
4. Cold plate temps.
5. IHS CPU temps via BIOS.

Regards,

Elloquin
    
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post #12 of 21
Thread Starter 
Made some voltage adjustments. Last run until rebuild





    
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post #13 of 21
Phew!

That is sick!

Stick it on a CPU already, I can't bare the anticipation.

Also, got to ask, are those voltages tuned to be able to take a CPU heatload?

Or will you have to drop down the voltage on the bottom TECs to avoid exceeding Qmax on the top TECs?


Either way it's still awesome though
    
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post #14 of 21
Thread Starter 
Stock Runs: i7 920 D0

Test Bench: Core i7 920 D0 stock for now, EVGA X58 Micro atx Motherboard. I plan on replacing this with a Gigabyte X58OC probably unless they make it like $500 lol.


Temps: Left to right, Thermocouple mounted ~3mm from the base (I think it may have pulled out a bit as it usually reads a bit colder than the other one), Thermocouple on the opposite side mounted ~12mm from the base (I have a third for the midplate not yet added) Water temps, and Ambient.


I HR Prime Blend Stock HT ON if turned off just subtract another 6-10c from what you see although the board won't read past -23c.


Lastly, Voltages...

2 x 62mm TECs http://www.customthermoelectric.com/...Z_spec_sht.pdf
2 x 50mm TEC's http://www.customthermoelectric.com/...W_spec_sht.pdf

2 x 62mm TEC's wired in series 48v PSU set at 32.66v or 16.33 each=66% max voltage.
2 x 50mm TEC's wired in series 24v PSU set to 19v or 9.5v each=31% max voltage.
Edited by Elloquin - 5/9/11 at 10:20am
    
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post #15 of 21
Man, that tastes like blood from the mouth of phase change.


That is truly awesome!
    
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post #16 of 21
What's the 2x50mm CTE hotside temp? Also, have you tried running the 2x50's a little higher or is 9.5v each about all you can do using the 2x62's to cool it?
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post #17 of 21
Thread Starter 
Quote:
Originally Posted by un-nefer View Post
What's the 2x50mm CTE hotside temp? Also, have you tried running the 2x50's a little higher or is 9.5v each about all you can do using the 2x62's to cool it?
Like I said mate I will be adding another thermocouple to the mid plate to get those temps but as far as what the actual temps of the hot side of the TECs it's a bit hard to tell since they are stacked. Running the 50's past ~30% didn't make a difference when I was messing around with voltages unloaded. Now that it's to the point it is I can mess about a bit more.

Regards,
Ello
    
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post #18 of 21
Quote:
Originally Posted by Elloquin View Post
Like I said mate I will be adding another thermocouple to the mid plate to get those temps but as far as what the actual temps of the hot side of the TECs it's a bit hard to tell since they are stacked.
Would one of THESE work?


Quote:
Originally Posted by Elloquin View Post
Running the 50's past ~30% didn't make a difference when I was messing around with voltages unloaded. Now that it's to the point it is I can mess about a bit more.

Regards,
Ello
yeah, don't think it'll make much difference unloaded. But withyour i7 it should be noticable.

I'll keep an eye out for an update
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post #19 of 21
Thread Starter 
Quote:
Originally Posted by un-nefer View Post
Would one of THESE work?

Can't really get to that part of the block with that it's insulated heavily. Like i said though I have another thermocouple and the meter on the right can take two so i added it last night as i had the foresight to predrill a hole in the midplate. This way I can show cold side temps 2mm from the IHS. 12mm from the IHS on the opposite side of the block, and finally the midplate temps which are the junction temps between the stacked TECs.<---not sure of the value of this measurement at this time. That meter can also show the delta between the thermocouples so I can also if wanted provide the delta between the thermocouple that is 2mm from the IHS and the midplate. As it is it compares the thermocouple that is 12mm from the IHS to the midplate which reads slightly higher than the one that is 2mm away which is to be expected. The point I am getting to in this long drawn out diatribe that I apologize for is the base design working as intended if not better. As it is the block is surpassing the math as far as performance. Which is what I have always said. You HAVE to plan and then run the TECs, kinda like "Nuke it from orbit...it's the only way to be sure" Remember this entire setup uses less than (I don't have the exact figure) ~maybe 8 ounces of copper. The rest is design (Props to Mindchill) of the injection layer. So material wise it is "cheap" Please note though the machining time for this sort of thing is kind of mental.

yeah, don't think it'll make much difference unloaded. But withyour i7 it should be noticable.

There is room I believe (and from what I saw last night) to go as high as 10.5 to 11 volts on the 50's. I plan on putting up a ton of numbers for EVERYONE and hopefully somewhere in the middle we can all manage to get along long enough to make suggestions discuss theory etc...which is what this forum is supposedly about. At some point I need to discuss and/or do a write up on thermocouples as I don't think everyone understands what they are. They are simply temperature probes intended for commercial/industrial applications to monitor temps. They often can read more accurately at sub zero temps (which is why everyone using dice,phase and/or LN2 uses this to monitor temps and ignore the temp sensors on the chip and/or the board...I'll get to that next)

I ran the rig for an hour last night but was messing around with different mounting pressures went too far and froze the test lol. Some of the readings from the diode on the chip and the Eleet monitoring software versus the thermocouple that is 2mm away from the IHS center are basically impossible. I think the pressure (and there is quite a bit here) and the cold are doing strange things. I'll know more tonight when I re-run the test to verify.


I'll keep an eye out for an update
Workin on it mate
    
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post #20 of 21
Thread Starter 
1hr warm up prime blend and then 2 hr Prime blend. Damn board went to sleep on me...On a nice note I was able to do this at a lower vcore than ever before due to the relative stability of how cold it actually stayed.

D0 920 @ 4.2 GHZ





@Un-nefer sorry forgot to take a pic maybe i'll run it again but the mid plate temp was 9c.

Edited by Elloquin - 5/12/11 at 3:30pm
    
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