Crazy screen in bios and before windows boot

[Bureq]

Hello everyone. 

Before few days i noticed problems with display when i start pc - that part with motherboard manufacturer when before boot. Sometimes there are only minimal crazy things with logo and sometimes is rly crazy like on uploaded picture. I saw on internet that I should try use default settings for bios and i tryed to do that and when i entered bios i noticed buggy display, some colors are wrong and i can see green, purple and yellow lines on parts of screen that should be black and bottom part of bios should be yellow and now is crazy. Now i need help and i have some questions. Is this hardware or software problem? Pc is working fine, gpu is working fine (RDD2 working like before) and i tryed to use integrated gpu and i still have that crazy display in bios. I think that this is caused by combination of old bios and fresh drivers. I never updated bios so i didnt want to risk it because pc worked fine. One more thing, i made mistake when i was buying pc and i didn't checked ram support so i bought ram that was not on support list but they worked fine even with expo turned on but after few driver updates some problems started - red light on dram on motherboard when i turn on pc and pc would not boot but after restart everything would work fine and light would be off - support team from Gigabyte told me to update bios. And one more question  can problem with ram like this one cause problems when you update bios? Customer support from Gigabyte told me that I should try to update bios but they are not sure if this is harwarde or software/bios problem. Thanks for help and sorry for bad English - not my main language :).

 

Pc parts 

CPU : 7600x

GPU : Sapphire 7600

Motherboard : Gigabyte B650 Gaming X AX v2

RAM : G SKill F5-5200J4040A16GX2-RS5K     2x16gb