A decent basic motherboard for an i9-9900k for not overclocking

Dave3000

Senior member
Jan 10, 2011
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#1
Is the MSI Z390-A Pro a decent motherboard for an i9-9900k for not overclocking? Will the VRMs on this motherboard allow a 9900k to maintain a 4.7 GHz all-core turbo during heavy CPU usage on all cores when using this motherboard provided that I have good enough cooling?
 

Dave3000

Senior member
Jan 10, 2011
915
4
81
#3
I don't want to spend more than $200 on a motherboard. I don't intend to overclock. If I can get by with an MSI Z390-A Pro with a 9900k at stock without the VRMs throttling down the 9900k below it's 4.7 GHz all-core turbo when 8 cores with 16 threads are fully loaded in AVX loads then I'm considering that one. I'm willing to buy a Gigabyte Z390 Aorus Pro instead if it's worth it, but if it's not going to do anything for performance and stability at stock CPU settings with a 9900k and I'm only paying more for features that I won't use then I don't see the point.
 
Apr 27, 2000
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#4
@Dave3000

All Intel chips have an AVX offset. Your CPU will throttle down by default even on the best board on the market in AVX/AVX2 workloads unless you deliberately move the offset to be equal to "normal" clocks (most folks use -200 MHz offset at the least).

I would read reviews on the board-of-interest and see if it can hold clocks running a stock 9900k. Also look at the power consumption numbers. Some of those Z390 boards draw more power than others.
 
Mar 19, 2017
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#5
If your workload is heavily threaded and avx capable, have you looked at a 3900x instead of a 9900k?

What type of cooler do you plan on using - Air (tower or downflow) AIO water, or custom water? This can make a difference to whether the vrms get enough airflow to prevent throttling (provided the mb heatsinks are actually capable of their job)
 

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