Quote from: Photon939 on January 09, 2015, 11:56:20 PM

Quote from: opentoe on January 08, 2015, 04:22:33 PM

Quote from: Photon939 on January 08, 2015, 04:59:48 AM

It's rather amazing how poor quality those pumps are, I've been keeping my C1 cool with one of these little guys http://www.ebay.com/itm/12V-DC-CPU-Cooling-CAR-Brushless-Water-Oil-Pump-Waterproof-Submersible-AP-/121458053302?pt=LH_DefaultDomain_0&hash=item1c4776d0b6

$6, no problems at all.

Those are water fountain / fish tank pumps which do work, but have half the pushing power and height as the C1 rated pump. They also have no reservoir, unless you have that pump sitting inside a small bucket of coolant or something?

Quote from: notlist3d on January 08, 2015, 04:30:45 PM

Quote from: opentoe on January 08, 2015, 04:22:33 PM

Quote from: Photon939 on January 08, 2015, 04:59:48 AM

It's rather amazing how poor quality those pumps are, I've been keeping my C1 cool with one of these little guys http://www.ebay.com/itm/12V-DC-CPU-Cooling-CAR-Brushless-Water-Oil-Pump-Waterproof-Submersible-AP-/121458053302?pt=LH_DefaultDomain_0&hash=item1c4776d0b6

$6, no problems at all.

Those are water fountain / fish tank pumps which do work, but have half the pushing power and height as the C1 rated pump. They also have no reservoir, unless you have that pump sitting inside a small bucket of coolant or something?

From the specs that one is rated around 1/2 of volume pushed. I would guess it's partially based on ambient temperature. If OP has very cold ambient it will cool the coolant when in the tube, not just in the radiator.

Personally I would not go this route but I know a few through this thread have. You would use anything that holds water and is big enough to put it in as a reservoir. Reservoir's are not really anything special.

You'd be amazed at how little flow you really need for most water cooling systems. Although Bitmain chose fairly small hose ports, the blocks are not crazy restrictive (and if they were, it would be a bad design) plus 2 meters of head is pretty good for a small pump. It takes a lot of energy to heat water significantly during the 3-4 seconds it spends in the C1 water blocks before it heads back to the radiator.

Here's a screenshot of the current temps of my C1 and it's not that cold in my basement, approximately 60F (15.5C)

Picture of flow obtained with the little pump

I have 3 C1's sitting right next to one another, in the same room and all three have different temps. Ranging from 29-43. It all depends on the miner rig. I have 6 of them and I'm aware of which 2 run hotter than the others. Why they run hotter? Most likely a quality control issue with the thermal or some other thing. None are exactly the same.