Having differents BSOD

In short, this started a few months ago, maybe four months, and it was bearable. Before, I only got IRQL messages, and I managed to resolve them with the limited knowledge I have. After that, it stopped for a while and came back about 2 months ago, becoming more annoying, and giving different BSODs this time. I thought it might be the motherboard because it was already messed up, and yesterday I replaced the motherboard. I spent the whole day fighting different types of BSODs, researched, took it to a technician who said the problem could be the RAM. Since it's absurdly expensive in my country and I don't have any other RAM to replace it to test in the moment, is there a way to check the RAMS alone? Like a test or something.

Sometimes I boot the PC and the windows don't start properly and I have to restart it. It's not saving data from some applications; for example, I use Equicord, and every time I get a BSOD (Blue Screen of Death), I have to restore the backup because it resets to normal. I can't download things cause it always BSOD too.

I reinstalled windows clean 3 times already and the BSOD still there, just changing messages. Those are the ones I got so far:

IRQL_GT_ZEEO_AT_SYSTEM_SERVICE

KMODE_EXCEPTION_NOT_HANDLED

IRQL_NOT_LESS_OR_EQUAL

PAGE_FAULT_IN_NONPAGED_AREA

SYSTEM_SERVICE_EXCEPTION

DRIVER_IRQL_NOT_LESS_OR_EQUAL (Failed: dxgkrnl.sys)

SYSTEM_THREAD_EXCEPTION_NOT_HANDLED

SYSTEM_SERVICE_EXCEPTION (Failed: FLTMGR.SYS)

BAD_SYSTEM_CONFIG_INFO

ATTEMPTED_WRITE_TO_READONLY_MEMORY (Failed: FLTMGR.SYS)

CRITICAL_PROCESS_DIED

KERNEL_SECURITY_CHECK_FAILURE

I can't access the Windows dumps; it says I don't have permission. I don't know if Bluescreenview would be helpful in getting more information.

If anyone knows a way for me to open the dumps, please tell me!

(If in the wrong tag ill change it, mb)