Could it be my motherboard? I changed the riser cables to see if it changes from GPUs and I saw that it made difference. GPU2 that was spinning earlier didn't spin anymore and GPU3 that did not spin now started spinning. So could it be that my motherboard needs more power?
This is my motherboard: MSI Z270-A PRO Intel Z270 and I bought it from this link:
https://www.mindfactory.de/product_info.php/MSI-Z270-A-PRO-Intel-Z270-So-1151-Dual-Channel-DDR-ATX-Retail_1136691.htmlI know that my H81 BTC PRO R2.0 motherboard needed extra power using molex cables from 2 sides, but this motherboard doesn't has any. I really hope that someone can help me here, cause it's starting to frustrate me now.