GTX 1080ti has a maximum power consumption (TDP) of 250 Watt. 6x250 = 1500 Watt. Better used 2x1000 Watt PSU, for keeping another part Of mining in good condition and for an along term mining process. for PSU can Corsair or EVGA.

OP seems gone, but I hope our discussion will be a reference for the other with the same problem with OP.

Mining using a laptop will only make your laptop broken and have a low profit not even have an advantage. Making electricity payments greater than profit.

Try to rebroadcast your TX using this https://blockchain.info/pushtx , https://coinb.in/#broadcast , you can search on Google for the other. Or maybe you can try this service: https://bitcointalk.org/index.php?topic=2498643.0

You can try Bitcoin Unconfirmed Accelerator service like this: https://bitcointalk.org/index.php?topic=2498643.0 or you can do it your-self using http://blockchain.info/pushtx , https://coinb.in/send-raw-transaction.html , http://blockr.io/tx/push , etc, Good Luck!

when I was trying for fun with my Pi-2, I use this tutorial http://www.mybitcoin.space/2017/02/how-to-mine-with-your-cpu-or-raspberry.html. if you are not looking for some profit, yes, you can do it with your Orange-Pi.

I do not write the word "s u g g e s t i n g" or words anything the same meaning with that . I just write NVIDIA: 1060,1070,1080,1080Ti and I have explained: "for AMD Card is better than NVIDIA, but for NVIDIA equihash is better and for NVIDIA power consumption lower than AMD Cards."

But for the correction. I say Big thank's,hero

The profitable calculator of altcoins: https://www.coinwarz.com/cryptocurrency
The Compare GPU hardware : http://whattomine.com/
You can search in this forum about the hardware used for mining such as Motherboard, Power Supply recommended.

AMDs Cards : R9 290,290x,390,RX 470, RX480, RX580, Vega.
NVIDIA Cards : 1060, 1070,1070ti, 1080, 1080ti.
for eth AMD Cards better than NVIDIA, but for equihash NVIDIA more better and for power consumption NVIDIA lower than AMD Cards

For 6 GPUs:

• Gigabyte H110-D3A LGA 1150
• MSI Z170A
• MSI Z270 Gaming M7
• Asus Prime Z270-P

For 7 GPUs:

• Asus Prime Z270-A
• Asus Rog STRIX Z270E Gaming
• MSI Z170A Gaming M5

more 7 GPUs : Asrock H110 Pro BTC+

Power meter (like killaWatt) will talk about actual electricity being used, how much power used when the system is idle, working, GPUs when Idle or working.

You can try :
1. Check a cable PCIe USB Riser.
2. Move to other PCIe slots.
3. Plug your Cards, One by one.
4. Patch your atikmdag, using atikmdag patcher.
5. Patch your Win Registry using 6GPUs patcher.
6.Check your drivers if using multiple series.
Good Luck

Nicehash is auto-switching mining gateway software, but now they got hacked, we should call them NiceHack now lol. Auto-switch wouldn't worth if that coin only profitable for a few hours. I suggest to chose few coin that have long-term profitability calculation.

When all people use it, didn't mean that's the better. You need to have your own fashion. Some people said X card is the best the other one said Y card is the best. You just need to read carefully technical data from the card that will you buying. Doing some research in legit review. After all, learning by doing is a better way.

Kalau agan mau pake SSD bisa 64 GB juga, kalau ane pake nya 128 GB Samsung sama 128GB Corsair. kalau mau beli ane saranin yang Samsung gan bagus Performance + Durability nya.

List of the Altcoins can be mining: https://www.coinwarz.com/cryptocurrency
yes, you can mining bitcoin if you have Asic like Bitmain (https://www.bitmain.com/) or Avalon.

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Big Thank's

kalau dari pengalaman ane gitu gan. tapi mudah2an agan ketika instalasi RIG lancar2 saja, ngk terlalu banyak restart dan ngk sering mati lampu.

Sama2 Agan mastah , ya SSD cuman recomendasi. kalau agan mau pake HDD juga silakan . Good luck

tentu tdk berpengaruh untuk  hashrate tapi ingat Mining itu bukan sekedar hashrate tapi ada pendukung lainnya. sebelum menghasilkan hashrate pasti ada Instalasi Win, Instalasi Software dan sebagian file itu di simpan dalam Secondary storage.apalagi Jika dalam 1 Rig terdapat Series dan Merk yang berbeda yang pastinya Instalasi tidak segampang menguap,pasti ada masalah apakah itu VGA tidak terdetect yang membutuhkan computer di Restart terlebih dahulu.