Ok, I've just finished testing the other RAM stick. It passed 9 tests and it was done without errors. Recently I've had very different BSOD messages, unlike when they first occured.
At first they were these four, top two being the most common BSOD
APC_INDEX_MISMATCH
IRQL_NOT_LESS_OR_EQUAL
UNEXPECTED_KERNEL_MODE_TRAP
KERNEL_SECURITY_CHECK_FAILURE
Now i'm gonna list all the BSOD messages:
VIDEO_DXGKRNL_FATAL_ERROR
ATTEMPTED_WRITE_TO_READONLY_MEMORY - what failed: Npfs.sys
DPC_WATCHDOG_VIOLATION
SYSTEM_SERVICE_EXCEPTION - what failed: RTKVHD64.sys
IRQL_GT_ZERO_AT_SYSTEM_SERVICE
KERNEL_THREAD_PRIORITY_FLOOR_VIOLATION
PAGE_FAULT_IN_NONPAGED_AREA - what failed: Wdfilter.sys
DRIVER_OVERRAN_STACK_BUFFER
THREAD_PRIORITY_FLOOR_VIOLATION
ATTEMPTED_EXECUTE_OR_NOEXECUTE_MEMORY
INVALID_KERNEL_STACK_ADDRESS
KERNEL_AUTO_BOOST_LOCK_ACQUISITION_WITH_RAISED_IRQL
KMODE_EXCEPTION_NOT_HANDLED
DRIVER_IRQL_NOT_LESS_OR_EQUAL - what failed: tcpip.sys