Yes that WD-40 product will work perfectly.  You really arent cleaning the PCB.  You are cleaning the heatsinks off.  The dust and dirt on the heatsinks acts as a blanket insulating the heatsink.  The heatsinks whole job in life is to dissipate heat from the chips on the card to the surrounding air.  Insulate the heatsink with dirt and you just lowered its ability to do its job.  I would get your equipment on a regular scheduled maintenance shutdown and clean BEFORE it ever gets this bad again.  Maybe every 6 months? Maybe 4?

Exactly.  The sentiment of i was making $75 a day two months ago but now im only making $45 a day now so im going to sell everything is just plain stupid.  Sell it all for a loss or slight "profit", keeping in mind that slight profit could be made every month just continuing to mine with the kept equipment.  Sell it all....Great Business Decision turned into a Stupid Life Lesson.

Id offer $200 each and see if he really needs the $$.

Looks pretty accurate to me.  These newbies always seem to not know the 80% derating.  FYI for all newbies.  YOU CANT RUN YOUR EQUIPMENT AT 100% Duty Cycle on Wiring and transformers rated for 80% Duty Cyle.

550v 3 phase? WTF!

Holy Cow!  After looking at the pic you were way over due for cleaning that D3!  You are lucky it didnt fry itself!

Telling the OP to sell the GPU's now has got to be the dumbest idea ive ever heard.  The "market" appears to be down BECAUSE Btc price is down and the OP gets paid in Btc on Nicehash.  You still are mining around or just under the normal rate that you have been (difficulty levels not withstanding) but your payments are worth less because Btc is down to just over 9k.  When Btc goes up....So does the dollar value of your Btc that you have been paid by nicehash.

Keep mining with ALL the cards and just wait out the dip....It will go up and when it does...CASHOLA.

Are you Pete or Repeat?

Bet you have your riser plugged into a sata wiring harness coming from your power supplies SATA feed to the hard drive, cd rom, etc.  There is not enough power on that SATA cable.  If you have a modular power supply then plug your sata daisy chain cable into a 6 pin PERIPHERAL socket NOT a SATA socket.  If you dont have a modular power supply then hook it up to SATA power cable from the power supply that is not being used for anything if available.  Its not detecting because there isnt enough power to the riser.

You all know whats going on here right now, right?  They know the crypto events coming in the middle of March.  Follow me here.  They also know that the price is going to shoot up by the end of the month.  So they ran prices down so they can buy more coin for their added additional money so when it runs back up toward the end of the month, they cash out with huge profits.  Just like the stock market.  Shorting the hell outta it.

Nothing is illegal until you get caught, and who on earth is going to find you in the jungle? 

All totally depends on who wired the house or even added on later.  My living room alone has one wall on a 20a breaker, the opposite on another 20a breaker and the smallest wall has its own 20a breaker.  Even most of my lighting is on their own 15a breaker....some are paired.  If the house was built by a contractor and on the cheap budget then the whole room is probably on one breaker.

As many have said here.......To the OP........DO NOT CHANGE THE BREAKER TO HIGHER RATED BREAKER!   And here is why.........

A circuit breakers two jobs in life is to PROTECT THE WIRING THAT IS HOOKED UP TO IT and protect a person from getting electrocuted because of a short to ground in an item that is plugged into its power circuit which ultimately also PROTECTS THE WIRING.  The wiring in the wall is a certain gauge (size) and the breaker is sized by that.  A 20a breaker protects 12ga wire.  A 15a breaker protects 14ga wire. If you stick a 20a breaker on 14ga wire, you are allowing 5 more amps of current to flow through a wire thats only rated for 15a.  The wire gets hot, the insulation of the wire gets soft and breaks down and when the wire starts glowing it will ignite the inside of the walls on fire. DO NOT DO THIS.  All this applies to fuses too.  Never stick a higher rated fuse in place of what it is suppose to be.  A fuse pops and a breaker trips FOR A REASON.

I have two rigs, one with 8 cards and the other has 10 and im running win 10 pro updated to 1709 with absolutely no problem. First I would remove all drivers and install the crimson blockchain driver from AMD website.  How do you know windows is the culprit? Id suspect the motherboard bios OR your power supply wiring to the risers.  How many gpu risers do you have on one sata cable train? Is your sata cable plugged into the sata outlet of your power supply or the peripheral outlet (assuming you have modular power supply).  Id put no more than 3 maybe 4 depending on what cards are used on a sata train cable.

Last guy is absolutely right.  Your residential electrical equipment is NOT rated for 100% duty cycle.  Meaning you have to derate everything to 80%.  A home 15a branch circuit is only good for 12a of continous duty and a mining rig would fall under that category.  Your wiring in the walls all the way to the circuit breaker for the outlet you are using is getting quite warm. Your outlet is getting quite warm too and can fail. There is a good chance eventually it will catch your walls on fire.

Surge protection is rated in joules NOT amps.  The amp rating you are seeing is the rating for the surge protector within the power strip and its power cord. You would burn it up if it didnt have its own circuit breaker built in.  Breakers tripping arent good for mining since the rig is then down.  You need to figure out if there are any outlets in your room that are on a different branch circuit breaker and plug on of your power supplies in that one BUT you should also figure out what all you have plugged in to each circuit too.  You could have many outlets on the same breaker and even your lights on one of them.  You could also just have one breaker feeding every outlet in your room and the lights so you could very well be up against the max when the lights and other things are turned on while your rig is running.

It would be a 4:1 stepdown going from 480 to 120v.   The current would end up being 4 times higher on the 120 side vs the 480 side though not including losses.  Price one....they aint cheap at all.  How big of area do you need?  How much land do you already own? Theres peace of mind having better security at your own place instead of having to worry about someone breaking into your warehouse across town. The gas back and forth will to the warehouse will more than enough pay for a couple German Shepherds to roam your own land around your own building.  There are options.  Prefab outbuildings, sheds, garages and even custom builds along with DIY. FYI Bring in a prefab shed and they put it where you want it, there are many places that will build to your spec and most places dont charge you property tax on the sq footage since its not considered a permanent structure like a garage. Sit the shed on cinder blocks, crushed rock or even on its own skids.  I have enough room to to put many of those on my house lot before Id have to start getting into my woods and start clearing.  The startup costs for a prefab shed, its own electrical (internal and the power feed) and ventilation/air conditioning are quite attractive.

How many Gpu's are you talking about here that need to be put to work? What kind are they?

If you have to get a warehouse with 480v 3 phase and are buying 480 to 240 step down transformers you (A) Better have some serious cashola ready and (B) Better hope Bitcoin goes to $100k soon or you will never recoup your investment unless your rigs/farm is already paid for itself.  Id hate to see what a 480v 3 phase power bill looks like!  I know 208 3 phase aint pretty for one of the radar station I take of (power distribution and backup emergency power). 3 phase is more efficient when you dont have to step it down (this is where 208 3 phase comes in handy) but the up front costs along with monthly whether or not you use it can be high.  Me personally if I ever surpass my homes 200a supply then I will just put a shed or small garage on my 5 acres that is dedicated just for that and have another service entrance brought in to that building.

Yep the Crimson driver was only meant for RX5xx series cards and above. Not R series.

Im running 2 rigs with the Asus B250 Mining Expert.  One with the G3920 and the other G3930.  They were both running fine on 4gb ram PC2133 but I went ahead a stuck another 4GB ram in the other slot of each board for a total of 8Gb per motherboard.  I use 120gb ssd for each rig.  Currently have 10 Nvidia Gpu's on rig 2.  7 amd and 2 Nvidia on the Rig 1.  Win 10 pro updated to 1709.  Bios ver 1001.  Currently running nicehash.

I have to agree....$2-$3 per 1050ti is just not realistic.  Thats more of a 1080 daily earnings amount.  I have 10 1050ti's myself and they run around .70-.90 daily, lately being towards the low side of that.  My 1080s earn $2-$3 a day each.  Im on win 10 pro and use nicehash currently.

Which version riser are you using? I use strictly 006c ver and oddly have never even gotten a bad one, yet.  I strictly use 120gb ssd, they are $48. I run win 10 Pro, updated to 1709 and Asus bios ver 1001.  The 3 molexes are NOT connected on my m/b.  I have two sticks of 4gb memory pc2133.  Intel G3920 Cpu on Rig1 m/b and G3930 Cpu on Rig2.

No.  When running all 19 slots on the motherboard 6 HAVE TO BE P106-100 which is the dedicated minor card (Essentially a factory manufactured 1060 made to mine only with no video outputs).  It has to post as a 106 card or you WILL NOT be able to use 19 cards total.