Hi my pc: 108500K stock 4800mhz 2x16 GB DDR4 GSKILL 3000mhz XMP Seasonic Tx-850 Ultra Titanium Gigabyte Rtx 3090 Gaming OC Aorus Z490 Pro Gaming 1 TB SSD My pc i have 6 months,never had any WHEAS. I tested Control, Quake 2 rtx, Metro Exodus,3dmark port royal,battlefield 5,Serious Sam 4 and other games. No Wheas during 6 months,no bsods,no crashes. My system is updated to newest Win 10 H20. Today i run again Metro Exodus Enhanced Edition for 7 hours. After exiting game i check event logs and saw 1 WHEA Internal Parity Error. The exact WHEA 19 was like this: error source: unknown error source error type: internal parity error processor ir: 3 MciStat0x9000004000010005 And my question is why one single WHEA appeared after 6 months on stock cpu?! I have only XMP on. But memtest no errors. Rma cpu then?