thnx for reply, ive tried with one card and riser and miner works fine ( yes ive adjusted VM) , when i try the other card that also works fine, but when i try both with risers i get a colorful pixel picture on my screen. ive updated bios and i get the colorpixelsscreen both with default bios setting and with pcie gen2, and 4G enabled. so i know that risers work, cards work, but not together ....