Well maybe, try to find if it has bios settings for TOLUD set it to lower than 4G or above 4G. B150 chipset will not run more than 4 max out is 5 and it will run only on Biostar TB150 I think.
Maybe try one of these it's all Asrock. I think the used Z170 (MSI, ASUS) would be best low budget mobo if you can't get BTC ones, Z170 can run 6 gpu with some troubles.
http://cryptomining-blog.com/tag/motherboard-for-ethereum-mining/Stay away from Z170-A Pro though, there is no way to set TOLUD directly in BIOS and it actually refused to boot system with 3 cards in(4G decoding was set in BIOS, did fuck all to help, had to flash down bios to G version for it to work with 2 cards).