Hey bro! i have similar system 10 years old, i5-3570 is a fantastic CPU, still,
but their times are gone, i had a premier intel board,
DZ77BH55K, the board died once around 2013, and i got a replacement, it still is running, coz its from a premier brand called INTEL ;P, this is the generation, Intel stopped manufacturing MOBOs for commercial purposes.. so recently what happened is i powered the Board to take a NVMe in its kitty in a Pcie socket, it worked beautifully for 1 Year and now the PCIe sockets are dead, meaning its buggy, no GPU is recognized, so now, despite the problem, the Mobo is stable and i use the iGPU onboard the CPU...it worked for a Decade., really great, and i have used it to its maximum potential, you can't get such MOBOs anymore, as the production is over and discontinued... i cant comment anymore about it..
Having said all these particulars, what you are facing is a MOBO problem which is normal thing with discontinued products, if u are lucky it will function well, otherwise it will break havoc and headaches, But time is precious, try to get SECOND HAND branded boards like DB75 Gigabyte, or ASUS DB75 kinda boards, or even better boards like DZ68 or DZ77 branded boards which might resolve your issues, but mind you, the life of the board can withstand another couple of years max..
i am planning to clear off this combo of DZ77BH55K and i5-3570 with premium corsair vengeance RAMs 3 x 4GB 1600MHz, with one bug that is PCIe slots are dead.. as this is not a sales thread, we can discuss in private channel if at all you are interested...