Hey all, Probably been asked a billion times already but this is a bit of an odd one - My bro bought an Asus 1070 Dual a few months back 2nd hand, and about a month ago he started getting some artefacts - Pic and video attached. He has removed all overclocks, tried underclocking core and vram but this made things worse - he claims overclocking has more stable results. Ive suggested taking out display connectors (done), hes tried different display cables. Ive then suggested try the PCIe power cable in a different port in the power supply, as well as a different cable if no change, and finally taking and reseating the GPU - cleaning contacts using either isopropyl or contact cleaner and letting it dry before reseating. Also trying the x8 PCIe slot. Anything else people can think of? I actually think his card is a dud... downfall of buying through gumtree without documentation but kudos to him on his first build though. Just want it to work for him, so all suggestions are greatly appreciated.