Overclock.net › Forums › Cooling › Specialized Cooling › Peltiers / TEC › Triple peltier chiller
New Posts  All Forums:Forum Nav:

Triple peltier chiller - Page 15

post #141 of 748
CPU @ 4.4ghz 1.2v, Cache @ 4.0ghz 1.15v, Vrin 1.9v, using iGPU for display. Ambient 25*c. Cold Plate 15*c. Setpoint 15*c. 2 x 1250rpm fans on my 360mm radiator, third fan not in use. Max core temp 31*c. I'm happy with that biggrin.gif When I drop the set point down to about 0-5*c this will get very interesting, I'll see how far 15*c set point gets me because it would be nice not to have to worry about condensation, but will chill it more if I need to to get to 5ghz plus, already I'm noticing about a 0.025vcore drop required for same mhz as on water cooling, maybe more as I haven't optimized this OC yet.

post #142 of 748
Thread Starter 
looking good biggrin.gif hope my chip dose that well lol
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
post #143 of 748
Thread Starter 
But I don't want to buy 6 of them controllers because there to money for my build and I just gonna boot the PC on stock 115x heat sink if it powers on its getting stuffed with Vaslien in the socket kneaded rubber around socket n on top of mount then some closed cell foam and run it full bore with the 3 250's then buy some basic temp controlled relays to turn on and off the power to the peltiers once the water hits around 10-15*c then under load it will run full power to try keep the cpu cold but I can't see keeping that cpu under 50*c under load all cores n HT and 1.5v max just hope I hit good fsb and keep it stable at a nice speed till she blows lol I almost got 8 x3440 Xeons they sold for just under £60 $100 roughly but my phone didn't load my £80 -$140 bid in time frown.gif would of kept the best 3 sold the other 5 at £40 each €60-70 made money for free CPUs frown.gif

My rip off cpu bet it's a crap batch wink.gif with my luck of cpu's never had to buy a cherry picked chip all my chips have hit high like my lucky e7200 775 500fsb 'classed as picked rare chip' I delided a soldered chip and it still lives Aswell haha
Edited by lzf995 - 10/22/15 at 11:03am
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
post #144 of 748
I'll play around with the overclocking today, take a bit of time to just enjoy the fact that the hard part is done now though biggrin.gif as for that controller, if you were handy with a soldering iron I'm pretty sure you could desolder that single 20A mosfet and run wires for the gate, source n drain to another PCB and populate it with more mosfets for more amps, might need a mosfet driver as well, and also there might be some over current protection built into the controller so it may not work, still for a single TEC direct die I'd say its the best possible solution without doing something custom.

I've been monitoring things today, I didn't change the wires on the TEC, left about 150mm of 20awg, they don;t even get warm when I'm stress testing at 4.4ghz, so I think this controller is probably still only applying about 50% duty cycle, if that. Everything else seems good, I put my GPU in and hooked up the third radiator fan, put a little PWM fan on the controller for the mosfet heatsink.

As for the insulation, LET was an absolute nightmare, and with the art eraser I'm not sure that the LET is necessary anyway. I think art eraser, vaseline and neoprene or closed cell foam is all it needs, I put layers and layers of neoprene around the socket and on the water block so it's basically an air tight seal in there now, it all squished up nicely when I bolted the TEC down, and it appears as though the mounting pressure has sorted out my thermal paste issues with the thermal grizzly, I'll find out when I try to run 1.4v+ through the CPU, if the TIM is too thick on each side of the TEC I'm sure I'll see some larger deltas that will let me know if I need to redo it. The CLU on the die and on the IHS seems to be doing the job perfectly at transferring heat to the cold plate. Time to ramp up the speed a bit biggrin.gif I suppose I better start my own thread now hahaha, sorry for the hijack, I know you like reading about any TEC stuff anyways, got something decent to post now though.

Man that would have been a sweet deal on those xeons, I rarely find anything for a good price here in Australia. I kinda like playing the lottery with CPU's, try to take every chip to its max, see if thats enough, the only chip I've bought more than 1 of is these G3258's, everything else has been one and done haha. I hope yours is a good clocker though, it's worth finding a good clocker when you can run higher volts under TEC cooling.
post #145 of 748
Thread Starter 
only thing im bit unsure on.. how are you only keeping such little heat load at such high temps i don't know where you have gained +16*c under load it shouldn't get that high it should stay mid 20*c unless you don't have a good contact somewhere and your loosing some cooing maybe thinner tim between tec and plates and see if you get better temps as i do that on my cpu if i put smallest amount and get a nice even pressure it takes 4-5*c over a little thicker even bit
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
post #146 of 748
Thread Starter 
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
post #147 of 748
yeah, I think I need to remount the blocks and redo the TIM, I set controller to 9*c and it couldn't hold the cold plate there in aida64 stress test with CPU at 4.8ghz 1.4v, after 15 minutes of stress it was at 14*c cold plate temp, it stabilised at 14*c after about 10 minutes, hottest core temp was 39*c, that was the hottest temp spike mind you, averages 30*c over the 15 minutes. It's as I feared though, the thermal grizzly was just too hard to spread on and has ended up too thick, I tried to smear it on really thin, but its almost like chewing gum, the best method was to smear it on, then rub the TEC and Copper plate together to get good coverage, then scrape off the excess, same for TEC and waterblock, but i think the paste is far too thick still as it just isn't holding the temps it should. My ambient is about 20*c, so my hot side should be about 25*c, which means I'm only getting an 11*c delta between my hot and cold sides, the only way to explain that is bad thermal losses due to too much TIM or bad contact or bad mount pressure. I'll have to do a remount when I can be bothered.

I managed to boot 5ghz at 1.475v while cold plate was set to 15*c, not stable though, pushed volts to 1.525v and still not stable, will have to play with that more.

Is a 25*c delta between cold plate temp and 100% load temp not normal? I was under the impression that was to be expected with these intel CPU's. there is no way that core temp won't rise above the cold plate temp when CPU is stressed 100%, so what figure should I be looking for here? 15*c above cold plate temp? less or more? I thought based on the delta between core and water block temp from my plain water cooling that this delta was about right. All I've done is drop my temps by 15*c, so I don't see why the CPU should suddenly start behaving differently and have a tiny delta between core temp and cold plate temp. am i wrong in that assumption? I have a thin cold plate, but a thicker one would only delay the temp rise slightly, it will still end up at the same delta if not more. I guess it can be improved slightly with the right TIM application and a better mount and contact but only 5*c at best, I think i need more clamping pressure more than anything.

one other thing, when I first boot PC up it starts fine, but if I do a restart when it is already cold it won't let me into bios and won't load windows. It's far too warm to be a CB or CBB so I'm not sure what is going on there.
Edited by LiamG6 - 10/23/15 at 8:36am
post #148 of 748
Thread Starter 
buy some better tim then expensive aint better in most cases i use the cheap stuff and it works fine
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
post #149 of 748
I've got some Arctic Ceramique 2, its thin enough to spread very easily so it should perform better if I can get an extremely thin layer, I'll have to have a look at the TIM spread when I pull the water block off to see if it was too thick or if maybe I have bad contact or not enough mount pressure. This thermal grizzly kryonaut was formulated for LN2 but performs about 5*c better than AC2 at ambient temps too in the tests that I've seen, that is why I used it on the hot and cold side of the TEC as 5*c is a lot. Also I think a 25*c delta between the cold plate and the core temp is actually quite good for Haswell CPU's from what I can tell.
Edited by LiamG6 - 10/23/15 at 8:48am
post #150 of 748
Thread Starter 
25*c still alot of loss why i rather use amd or somthing good soldered ihs biggrin.gif
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
under £350
(7 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500 msi z77a-gd55 herculez gtx 770 gskill & kingston 
CoolingOSPower
custom water win 10 pro  corsair gs800 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Peltiers / TEC
Overclock.net › Forums › Cooling › Specialized Cooling › Peltiers / TEC › Triple peltier chiller