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So I have a Biostar TB-250 the, 6 card style, and I'm trying to run 7 cards, one through m2.
I change bios to above 6 vga, installed the card and everything came peachy on Windows. No errors.
Started claymore, error , cannot create dag, came up. And it kept restatarting but Everytime it was a different card. Start it with 6 works perfectly. Enable the 7th a random card can not create dag. Tried to run another instance of claymore with the 7th card, same error would pop up. Tried claymore cryptonight, same issue just errord out.
I have 16 gig Set aside in hard drive as virtual memory but only have 4gig of ram in the system and the hard drive only has 1 free gig.
I need to run Windows because Linux does not recognize any adapters in m2 slot for this type of mb. It's not the psu , the m2 card or the risers. Running blocchain drivers with a mix of 480/580s.
Any ideas?

Same symptoms today going from 7 to 9 mixed RX's. Asus B250ME / 8GB Ram / 120 SSD / Win10

Had to increase page file from 16 to 32 GB. Solved.

yeah  even  64gb if you have room it will not hurt.

Yeah but I'm cheap and running a 60gig ssd since all my other Riggs are on Linux. What happens if I use a spinning drive instead of ssd? How much worse is the performance?

not that worse, a minimal difference in terms of performance

with mining only system, this should be fine

more important is the large pagefile you could get

I have faced these issue a long time ago and realized that I need is a more space to increase virtual memory allocation for all my cards.
So I decided to put another ssd on my rig. One ssd for windows10 installation, and the other one for a storage drive that I used for mining program and another file like graphics driver, portable tweaks, etc.
The mining performance had no difference at all (IMO). Everything seems fine and the mining program running smoothly as a usual.

It won't hurt the performance adding more space and use HDD is fine I think 120gb is enough to make your miner work then increase the pagefile to 32/64 as a recommended setup to run more than 6 cards.

Adding a normal HDD, a used one you can find for really cheap price in term of dollars, up to 30 dollars for a 500 GB WD HDD. Windows has a great option, you can fire up disk management and extend this hardisk to the actual one and increase the page file to 64 Gb without problems.

In some extreme cases the extend option won't work, in such case when formatting this new hard drive is to opt to mount it as a folder in C and you can use its space to make the page file 64 Gb, 30 dollars worth spending I suggest.

You have to increase your virtual memory. If you have small SSD then add some cheap HDD for it. Also add option –gser 1 or –gser 2 in your BAT-file if you are using Claymore or Phoenix miners.

You guys were right. I added an old 500gb spinning drive. Increased the virtual memory and boom. Worked like a dream.

Thank you