I'm using the exact same pump connected to the syscooling gen 2 harness...it has worked fine for a number of weeks at this point.

Got the RMA pump from syscooling today....no tracking #, no email, but unit arrived about 10 days after acknowledgement by syscooling...very well packaged.

@Tupsu....thanks for the advice. I actually already ordered a different brand pump that will be delivered on Friday.  So I'm going to wait and install that one and then if/when I ever get the promised syscooling replacement pump, I will keep it as a back up.

Today I received two batch two C1 miners with syscooling systems.  The original orders were placed on Nov 14 and 15.  Here is the good, the bad and the ugly.

Good...miners perform exactly as specified by BitMainTech...no surprise there...my first two C1's performed at spec as well.  The version 2 wiring harness from Syscooling is much improved in that it plugs into one of the extra PCI-e connectors on top of the miner.

Bad...I'm not sure if I have a bad fan or if one of the connections in the new syscooling set up is bad. In the version 2 set up I received two fans use one 3-pin connector and the third fan uses another 3-pin connector; the fan uses a 4 pin connector.  The version 2 harness connects to the miner via a PCI-e  connector and has three 3-pin connectors and one 4-pin connector. This leaves one of the 3 pin connectors on the harness "open" which may not be the best plan. In any case, one of the two fans connected to the same 3-pin connector is not spinning...again, not sure if it is the fan or the harness, but something clearly wasn't tested (again) by syscooling.

Ugly...it took numerous emails, photos and posts to get syscooling to offer to replace one of my first two pumps which is leaking/non-functional.  They said a day or two ago that they would "arrange shipping".  To date, they have not contacted me with any sort of tracking number or other confirmation that they have actually mailed a replacement pump. One 1TH/s miner has now been down for a week.  This coupled with the fact that I was also unlucky enough to receive one of the version 1 harnesses with a short which fried a fan header on one of my first C1s has left me with a very poor opinion of syscooling.com and I have to question BitMainTech's choice of partners. 

Update:  Syscooling sent an email asking if the pump was running or not.  I explained that it does run for approximately 2 minutes and then stops.  I believe the cause is the leak creating a short.  It will only run again after it has been turned off for a number of hours and it will only run for a few minutes at a time. 

Syscooling asked me to take more pictures at different angles of the pump that failed.  I have sent them four and am posting the most relevant one (in my opinion) for the forum. To be clear the leak is more like it is "weeping" between the plates that make up the body of the pump.

I don't know. They just responded to my PM (see Edit in my last post below).  I will let the forum know how the replacement process goes...good or bad.

Syscooling offered to send a replacement if I sent them a pic of the leaking pump via PM...which I did this morning, but haven't heard back from them as of this writing.

EDIT: Syscooling just replied to my PM and said that they will "see what happened so they can send a new one as replacement".  I will provide updates to let everyone know how this process goes.

I'm not going to try to "patch" syscooling's faulty pump.  When I first noticed the leak/failed pump, the miner was clearly overheating.  Fortunately, I believe it was only without cooling for less than an hour.  I really don't want to have the pump fail again while I am asleep or at work.  I realize the miner has an over temp shutdown feature, but I have no desire to confirm that it works properly.  I ordered a different pump and will use syscooling's replacement pump as a backup when / if get it.

It is very difficult to tell exactly where the pump is leaking, but from the image below it looks like it is between two "plates" that make up the body of the pump.

Sort of...the batch 1 C1s required a direct order of the cooling kit from Syscooling.com.  I ordered two kits directly from syscooling.com.  One had a bad harness that cooked a fan header.  The other now has a leaking/shorted/non-functional pump. 

I was able to fix the first issue by replacing the bad harness with simple 4 pin splitters that i connected to the remaining good fan headers.  Not sure what I am going to do about the second issue...that miner is still down.

I have recently order two more batch 2 C1s with the cooling kit provided directly from BitMainTech.  I will report on the quality of the cooling kits that come with these when I receive/install/run them.

Dogie / BitMainTech,

I said this weeks ago and will say it again...syscooling.com is ruining your reputation.  If you are going to market a water cooled miner, you need to find a different partner for the cooling kit.  This forum now has multiple examples of syscooling's bad pumps, bad harnesses, poor RMA practices, horrible customer service, etc. etc. 

Continuing to partner with them, gives us users the perception that these problems are OK with BitMainTech.  Based on my experience with you, I know this is not true.  You have been the best provider of consumer mining technology to date...PLEASE find a better partner for your cooling kits.

Two things:

1)  After less than 30 days, one of the Syscooling pumps died on me this morning.  I came down for breakfast, and the case fan was blowing at max.  I quickly realized the pump wasn't running and killed the power.  Powered on after a few minutes, the pump ran for a couple of minutes and then stopped again.  I power cycled one more time and the pump didn't try to run at all. Any thoughts or just RMA? 

Edit:  This evening I powered on the miner/cooling system again and the pump ran briefly once again and then stopped.  I also noticed a very slow leak now...so I suspect the coolant is leaking into the pump electronics and creating a short...thoughts on how to correct or should I just RMA?

2)  I ordered two C1 -B2s on the 14th and 15th respectively -- no tracking numbers on mine either, but much as in an earlier post, I'm not too worried.  I may get the miners before BitMainTech posts the tracking numbers.

The very same resistors were cooked on my board as well...

Or...we could just answer the questions:

1:  4 PCI-e connections (6 pin) are required -- one for each of the four mining boards.  There are a total of 8 PCI-e connectors (two on each mining board)...you just need to use one on each board to run at stock speed....so fill up one "slot" of 4 PCI-e connectors on top of the miner.

2:  Check out the harness carefully, I cooked at least two resistors on a board and killed a fan header because one of my two harnesses was bad.  I may do some reflow work to replace the resistors, but in the interim have replaced the harness with a few 4 pin fan splitters from the working headers.

3:  No, you have to remove the miner's cover to plug the provided wiring harness (or a replacement splitters / harness) into the 4 pin fan headers on the mining boards...I have already suggested that this sucks and should be an easy improvement for BitMainTech for future C1s.  That said, it's just 10 standard phillips head screws to undo and pull the cover off to get to the fan headers.

4: The RM1000 is recommended, but I assume you mean one RM1000 for EACH miner...right?

OK....time to take a step back.  Here are my views on the overall theme.

C1s are great...compact, efficient, low noise, easy to configure (maybe have to reflash an SD card, but not really a big deal)...BUT, the overall cost (mostly due to shipping) is a concern.

There are some serious concerns with the cooling kits...both in terms of quality and shipping costs.

I completely disagree with others on this forum who defend the shipping currently being charged.

This really isn't rocket science. It costs a lot to ship "one offs" from China to the USA. It costs much less (on a per unit basis) to ship lots of units. BitMainTech and SysCooling should work with someone stateside to figure out how to do this right.  I will take myself out of the mix so there is no conflict of interest, but somebody should make a deal to get a bunch of these to the USA via an efficient shipping method and then resell/reship them to US buyers....and I promise you, you won't have to spend $70K to do so and should be able to cut a deal to make a nice profit. 

Happy Mining.

Hmmm....actually it sounds like we are on the same page.  Assuming they have a typical 35 - 40% margin and can get them to me at $20 per unit shipping cost (as opposed to $118), we should both be able to make out quite well. As far as I know BitMainTech is not shipping the 4-miner cooling kit with their miners, so I don't understand your comment regarding having to ship "via air anyway".

I have not done the specific research, but will concede that it MAY cost that much to ship to the US in the most inefficient method possible.

If you are consulting for them, here is a suggestion...Have Syscooling or BitMainTech send a bunch (a few hundred) of the cooling kits via an efficient means like "less than a container"-- which would likely cost a tenth of what Syscooling is charging on a per unit basis.   Then have someone stateside act as their agent to sell/ship from the US.  They could do this on consignment or could wholesale to someone in the US who could make a few bucks retailing the system.

Hell, if they could get them to me based on a 5 week guaranteed delivery (they should be on the water for less than 4 weeks even with the west coast port issues); and if they will sell them to me for less that $100, I would take 100 units provided they give me the US East Coast territory...just a thought.

Except the shipping is as much as the cooling kit. That's just crazy.

Batch 2 sold out in one day....really

Not sure I agree.  Energy cannot be created or destroyed = true .But my argument is that the 1000w of electricity does NOT have to all be converted to 1000W of heat.  In fact, it CAN'T all be converted to heat or no other "work" could be done by the miner....so the more efficient the cooling, the less of the 1000W is needed for cooling = the more electricity available to get converted to "work".  Assuming that the watercooled miner is more efficient at cooling than an air cooled miner, it is a "worse" room heater.  Make sense?

So...the all in cost for the C1, cooling system and shipping (but before ~$150 PSU cost) is $500...I'm struggling to justify this.