Copy both, no harm.

One of three things are happening :
1) You did not plug in the power to the risers (molex or sata usually)
2) You have bad risers which need replacement, try them one at a time to be sure, and on the primary PCIe slot (the longest one)
3) You are plugging in the risers incorrectly on the motherboard. This could potentially fry the slot, the riser or the graphics card or even the motherboard. Here's an image to help :

Its meant for accidental shutdowns or power losses. If you just turn the mains off and back on, system will boot. If you shutdown your pc properly, well then its not accidental, and just turning power back on will not work immidiately, thats not what the feature is built for.
In such a case as you stated, you need to power cycle, which means turn off the PSU and wait a minute for the capacitors on the PSU/motherboard to discharge.

Hey Claymore, I see the miner uses Cuda 6.1. Do you think the recent Cuda 8.0 release could result in any speedup?

There is no reported hashrate, so this is more likely something like a botnet stealing shares, or maybe one of Claymores Fee addresses.

1) Profitability is directly correlated to hash as long as you are on a pool. There is no minimum or maximum hash needed to be profitable. However the most expensive/highest hashing ASIC gives you the most hashes per $$ so that reduces your ROI.

2) Correct, there are ASIC's for several coins like Bitcoin, Litecoin, Dash etc except the ASIC resistant coins like ETH, ETC.

3) Every Crypto would have its own set of pools, and one or two for each would be the best, these may not overlap. Do your research for each crypto that you are going to mine and choose from the top three pools for each.

I take my words back. I now have several Z270 boards that run 8 cards. Also have ordered the Biostar 12 card board.

Thousands of ETH??? THOUSANDS??? Casually buying 200+K in crypto ... you got balls man. While I am pretty sure ETH will cross 500 by the end of this year, I dont have the balls to buy ETH directly, so I mine.

If mining runs fine for 1 hour on 600, then its stable. Then you can increase +100 and run for 1 hour again. Repeat untill you find highest stable memory overclock

Nvidia cards auto OC to the highest core clocks possible depending on the thermal and power limit headroom availible. Also 1700+ is a pretty normal OC on Nvidia current gen cards. This is why manually setting an OC on the core is pointless, because the card will automatically OC if the card is cool enough, and it will automatically downclock if it gets hot. You can not control that behavior.
Secondly and more importantly, dial the fuck back on that memory OC unless you want to wreck your card, that is too huge, you need to start at +600 OC, run it for a while to heck if its stable, and then increase by 100, and repeat untill you find the max OC that runs stable for atleast an hour of mining.
Also, reduce the Power limit from 100% to like 60% if you are only going to be mining Ethereum since you do not need the core to clock to 1700+ as it doesent improve Ethereum mining performance anyways.
Cheers.

First off, you need to undervolt and underclock your GPU's, they are drawing too much power to hit 800+ Watts.
I am assuming you have already modded the bios for memory timings since you mentioned the memory type of the cards.
With 5 GPU's you should ideally be under 600W total system load under windows. Use a tool like Watttool to underclock and undervolt the GPU core each time windows boots, and to apply the memory overclocks that your card is stable at.

Second, MSI b150 PC Mate is known to struggle with more than 4 cards, so that is most liely the source of your troubles. Not all motherboards will do more than 4 cards.
The B250 Z270 motherboards are much better in that respect.
Having said that, I would recommend digging into the BIOS and spend some time disabling every Sata port and Every USB port, Audio interface etc that you are not using. ALso change all PCIE lanes to Gen 1.

Third, you could try no tusing the M.2 slot ssd and try with a regular ssd connected to a regular sata port to see if that helps, just in case the m.2 slot is taking up a PCIe lane.

Best of luck.

They do, on the motherboard that the OP is asking about atleast. And he did get what I meant. I don't know what rattled your cage though ...

Happened to my rig. PSU turned out to be the problem. Change it and check, if you have a spare.

Nice. Now how about you send us pics of Rigs that you build not images taken off of google search?
Place a placard with your name and current date on it against any of your rigs and then take pics.
That's how you establish proof, if you are familiar with any of the tech forums.

I thought everyone knew where to find the various PCIe gen settings so why bother explaining how to get to each and turn them one by one

All these are BIOS Settings that work for me on 10+ boards flawlessly :

Step 1 : Update bios to the latest
Step 2:  Disable Audio, Disable USB 3.1, Disable all USB ports except the first 4, Disable all sata ports except the one that your SSD is connected to, disable serial port
Step 3 : Set default display to onboard/igfx, enable 4g decoding
Step 4 : Turn all PCIe slots to Gen1
Step 5 : Reboot and run with all cards connected, let the cards intall for a bit, check in device manager when they are all done, then reboot system and voila

If you use a m.2 to pcie converter, you can get even 8 cards to work with the above settings. PM me if you still cant get it to work.

Address for Donation : 0x3e0a7e2c711af522cc9147816569fb7f0415bb19

Sure it all looks shady, but if he can provide us with pictures of the cards, and screengrabs of them working, some previous builds hes done etc to establish some kind of proof of life, then I am willing to do business.
And incase hes running a straight up scam, he should stick to OLX people are too tech savvy here on bitcointalk

How about you share a link to a website/blog where you have pictures uploaded?

If you are using powered risers, then you dont need the molex cables plugged into the motherboard.

Can confirm, 7 cards are detected, and installed in windows but while mining CPU usage will rise to 100% and miner crashes coz of hardware/interrupt errors.