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Dell H2C TEC - Page 2

post #11 of 31
Well the 1155 socket has a 75mm hole pattern but it would be easy to drill and tap the aluminum plate at the bottom of the H2C to add and adaptor plate. However form the pics of the MB the RAM would be in the way of the rest of the H2C assembly.

Some say that the H2C assembly is under pressure and uses distilled water and WaterWetter as the fluid. The pressure is probably to keep the fluid from boiling which is important and people claim to have successfully refilled their H2C units. I said all of that because the best chance of mounting the unit in the new system would be to separate the cold head from the rest of the unit.

I believe that the pump and TEC are controlled by PWM you need to find what frequency in which they operate. To do this you might could use a multimeter with a frequency reading but the most accurate way would be an OScope. If I were to do this I would start with building a PWM circuit and control the two manually passed on temperature readings form the two sides of the TEC. This setup could be automated later.

As a whole it is not simple so unless you just want a project you could sell the H2C and have enough money to buy a CORSAIR H100 or something similar. Based on reviews I plan to use the H100 on my next build.
post #12 of 31
Thread Starter 
i decided to just use the parts to make a new system - reuse the pump, rad and TEC and add a res and block...
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post #13 of 31
Just curious what the controller looks like in that dell rig.
Does it look anything like this?

final06.jpg

This is the MTEC controller that runs my boreas.

B
Boreas + Waterloop build
post #14 of 31
edgasket since your taking the unit apart, would you post the pin to pin config of the power cable. Thanks

This is the dell controller.
451
post #15 of 31
Thread Starter 
would you just prefer if I sent you the power cable? I don't need it any more... if you cover the cost of postage it's yours...
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post #16 of 31
Man, the H2C Cooler on the Xps 720 H2C was HUGE and becasue it was designed for BTX mobo's having one in a normal system would be stupid! i mena its HUGE like 14inch long and at least 6-9inch think (not including the fan unit)

I JUST sold my H2C after contemplating modding the case to ATX, way too much hassle, preferred the 450euro!
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post #17 of 31
Thread Starter 
Well, if you tried to fit it in as it was it might be a bit big, but I took the components out and will make a new shroud when the set up is sorted.
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post #18 of 31
Thanks but shipping to the U.S. would be way to much.
post #19 of 31


Modifying the Power plug from the Dell P14 Power supply special plug so it can be used in a standard system. As you can see it needs +12v, +5.5v, +3.3v, and a com. Cable KU238





Here I combined the 2 =+12v, and COM and was able to change it to a standard male Molex, but it can not be connected to a regular Molex due to the 3 different voltages, and the only cable I found to supply those voltages was either the main 24pin PCB Plug, or a SATA plug. I chose to modify the SATA by cutting off the end SATA, and re wiring it to a standard female Molex. This unit now powers up but still one cable remains...








I'm not sure if it is a rewired USB or Serial Com port? The little controller board appears to say Conn not COM for Cable DT861. Sadly I can't find any pinout or schematic other than a picture of the Dell XPS 720 H2c manual showing the location of the plug on the motherboard page 90 component # 26 liquid cooling assembly (TEC_PUMP). This plug does not power the TEC since its power is derived from P14. This is to control it via either USB or a Serial Com port. Please if anyone knows of this or can test on a working model, so I can finish this so anyone who wants a cool water loop with TEC cooling can buy one off of Ebay for under $50.








Even the Fan had to be rewired so its powered correctly PWM and its a nice Delta fan.







In this image you can see that it has 2 Tec's above the Blue Aluminum Water Cooling Block 40mmx80mm and 2 Tec's below giving 4 Tec's of cooling to the water block. Sadly I'd like to add another water cooling block like the one inside, but the only ones I find have the plugs on the 40mm end and I need them to be on the 80mm side. This way two Tec's and one water block is used to cool the water for the CPU, then flow into the other water block and those two Tec's can chill the water for display card, then pumped into the large Radiator to complete the cycle.





I currently use an Ultra Chilltec Black Thermo Electric Cpu Cooler but it uses only one 50w Tec and although it did manage to keep an FX 9590 in operation, but it was still running much hotter than I'd like. This Dell XPS H2c module can be modified to keep every CPU cool with a few modifications. CooliT was the original designer who made this system for Dell, but they no longer make these types of devices, nor do they have anything on the Dell System.







Again, Please if anyone knows of this or can test on a working model I can finish this so anyone who wants a cool water loop with TEC cooling can buy one off of Ebay for under $50. USB or Serial cable? Pinout or schematic of Cable DT861. I did lots of searching on Google, and Dell site but all to no avail.
Edited by Axl Odin - 4/16/17 at 9:26am
post #20 of 31
Hi Axl,

I've come across your post whilst seaching for information on my own H2C build.

I'm at the same point as you and i've hit the same wall. I don't believe that it's a modified USB connection, as USB uses 8 pins in a 10 pin plug, and the connector DT851 into the TEC_PUMP connection on the Dell motherboard is 9 pins in a 12 pin plug.

I've come to the conclusion that it's probably special to the Dell motherboard to provide the CPU temperature to the controller, and for the controller to tell the motherboard to turn the cooler fan speed up or down. That motherboard was a special manufacture only for this computer.


I'm now looking at using an MCB from an XPS 730 instead as the controller. That works from a USB connection to the motherboard (motherboard needs to have boot from USB function) and is controlled from an NVidia program in the OS. You need to have at least 1 nvidia component in the computer to use it.


The snagging point is that I don't have the pin-out for the H2C connector on the MCB. It's a 16-pin mini-ATX connector. 4 of the pins are for the TEC, 4 for the pump and 4 for the cooler fan. The other 4 i'm not sure about, but some postions may be NC.
I'm pretty certain that, working from the outside of the PCB inwards, pins 1 and 16 are TEC 0v and 2 and 15 are TEC +12v.
The rest i've got no clue on as Dell put every wire in black and sleeved, and there aren't any good quality really closeup pictures on the net.


I've got a spare MCB, and a spare computer, so i'm thinking of trying the setup out on that first, and hope i don't blow it all up more than once!

My goal is to find a second H2C (probably 720 as they are much more common) and then run a second TEC for the GPUs.
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