Hi
I was having several CTD’s and couldn’t end any flight.
After several hours of searching for the cause without success, I remember to go to the bios and turn off the XMP profile. After that, I’ve managed to fly a whole flight without any crash. I wonder why with the XMP profile on there is a crash. The ram is not overclocked, it has a default speed of 3200 Mhz which is the speed with the XMP on. Not using the XMP it is underclocked, the bios just read 2133Mhz.
Any thoughts about this? How to have the ram running @ is advertised speed?
Thank you.
HB
Hi, first of all… all DDR4 ram has to be able to run at 2133mhz. That is the standard speed if XMP is disabled.
I used to have CTDs, but I found that disabling XMP didn’t help much. What did help was to reduce my ram speed by ONE setting.
In other words, my ram is supposed to run at 3600, but I set mine to 3400 and I haven’t had a single CTD since.
There’s obviously a tolerance & the ram modules could all be slightly different. Maybe they are right on the edge of the advertised speed.
Dropping this down slightly certainly helped me.
You might want to try yours at 3000mhz (or 3100 if available)
Regards
Steve
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I have 3000 RAM clocked at 2600. I have not noticed any difference at all.
And not one CTD.
Make what you will of that.
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I have DDR4 3200mhz XMP II enabled, had a few CTD in MSFS, but no issues on any other program. I dropped it back one notch to 3100mhz, no CTD since. Looks like a few of us have done the same to resolve the issue.
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The first time XMP was turned on, I’ve run the memtest 86 for a couple of hours and got no errors. Apparently FS2020 is more exigent than memtest… 
When I used to get CTDs, they would usually happen after 6-8 hours while my plane was sat on the tarmac (much quicker if actually flying)
Reducing the speed slightly worked wonders for me (& the others here)
MSFS doesn’t like overclocking & (as far as I know) all DDR4 over 2133 is technically being overclocked.
Regards
Steve
I have 32GB ddr4 XMP 3200, what should I clock it down to
Try 3000 MHz if that doesn’t work disable xmp profile.