I have been turning AVX off in my bios to get a higher clock speed, does anyone know if MSFS uses the AVX ?
Does this actually give you a higher clock speed in practice? And more importantly, does performance increase?
The AVX clock offset should only matter when AVX is actually used. And for applications that use AVX well (that is, don’t just use a few instructions here and there), it will be faster regardless of the lower clocks as AVX instructions are very efficient at what they do.
Important is that Windows 10 itself uses AVX at desktop 
For testing purpose turn on AVX and set offset -2 or -1 → save changes and run system.
Yes, MSFS does use AVX. I have it enabled with -2 offset (to keep CPU temperature under control), and with MSFS it runs with CPU clock exactly 200 MHz lower than non-AVX programs.
Yes absolutely it does if I leave it on it drops my clock speed by 200mhz ( 5.1 v 5,3).
It does not increase clock speed on its own as you still need to OC your CPU but if I leave it on it results in not achieving the set multiplier.
But what about the performance difference? Lower clock speed doesn’t imply lower performance; if it were that simple, they wouldn’t have added AVX to begin with. In theory AVX can double the performance, but that’s only in extremely specific and simple cases – however, it can gain back more than the lost 200 MHz in more cases (that’s just 4%).
yes there is a higher FPS with higher clock speeds, despite SU5 this sim is still cpu limited to mainly one core. Yes it can use 4 but they are still lightly loaded compared to one core which is still running 100% . The higher clock speed results in better performance.
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