Been struggling with 5900X and MSI MEG ACE X570, was getting constant BSOD while idling or lightly threaded loads yet stress testing and benchmarks would run fine no issues with performance inline with reviews and decent temps with D15 (Idle = 28-32°, R20 = 60-65°). Spent ages flashing different bios, swapping out RAM, changing voltages but nothing made any difference until I disabled c-state in BIOS. With c-state on 'auto' or 'enabled' my voltages would drop to as low as 0.2v at idle, with c-state 'disabled' I'm now getting 0.9-1.0v at idle and zero BSOD now. Anyone else have this issue or notice this behavior on MSI boards? Is 0.2v normal and should my 5900X be able to idle at this voltage?
Yesterday I noticed MSI issued new 'D5' BIOS for the MEG ACE which I proceeded to flash, now I don't know if directly related but my RAM is now throwing up errors nearly instantly when using RAM TEST where as before was error free at both XMP and tuned tight timings. I'm using 2x16GB 3600C16 8-Pack and even if I clear CMOS, drop down to 3200Mhz (at 1.4v, soc 1.1v) I will get errors within 50% of test, even at 2400Mhz I will get errors. I tried flashing back to previous BIOS, clearing CMOS, retrain RAm etc and I'm still get same errors. Tried various other RAM testing apps such as MEMTEST64 and DRAM Calc but get same errors!? No idea what's happening and I doubt it's RAM issue, is my 5900X on the fritz? I can try a different RAM kit later today but like I say I doubt it's the RAM as it was rock solid stable to 5000% the other day at both XMP and tuned.