Alex11223 wrote:I thought it matters mostly for OC 9900k.
It depends, what do you expect from the 9900k? full 4.7ghz advertised by intel as turbo for all cores? if thats a yes then it does matter the vrms, if you want intermittent turbo (due to throttling) then go with whatever motherboard you wish.
If you run the 9900k under the 95W tdp "spec" its like 2700x and you will need to keep it around 4.2ghz on all cores, boards like Gigabyte and AsRock do allow the turbo of 4.7ghz advirtised by intel as their max to be ran fully when ever you want, this is not to be mixed with MCE (multi core enhancement), that i haven't even tested due to the temperatures that im getting. Now lots of motherboards that don't have good vrms simply throttle the cpu in order to keep vrms under control and the cpu temperature, thats a choice that you need to take before buying your motherboard. That said my 9900k run on the GIGABYTE Z390 AORUS MASTER under load stock @ 4.7ghz is more like 150W TDP cpu.
Alex11223 wrote:I decided not to consider Gigabyte when I have read about some issues with them but don't remember what it was exactly, I think one of the issues was that on overclock.net some people complained that the fans randomly reset the settings or turn off
If you manage to find the thread please link it, ill be interesting on reading the issues. I do have one though, the CPU temperature read by the motherboard (aka the one you see on the bios and gigabyte software SIG), is not the same as the core max or cpu package, it defers on average about 15C, but its not a big deal for me, think of this like an offset, you simply draw the graph and breakpoints knowing this. At the end i simply used the Silent profile (embedded on the bios) and manage to fully keep the 9900K under control with 2x NF-A15 on NH-D15S, i would probably tweak it some more if i were to install it on my main pc, something that im still deciding.... i think the cpu is really amazing but to keep it as quiet as i have my 8086 delided will be impossible, so im still testing and will decide later on.
Alex11223 wrote:Some of the differences in reviews also could be because of the mess with the settings affecting the boosts.
Thats a valid point, something that we will never know, testing procedures are not standard between all reviewers, but one thing i can tell you that in my limited testing, this CPU is like intel tried to push it to the limits almost to the point that there is barely any overclocking room, even 4.7ghz is a speed that really puts a big load on it and to assume this is stock is because intel really pushed it. I strongly suggest you chose a motherboard that has good VRMs on it, even if you are not overclocking, if you don't want Gigabyte its fine, AsRock Taichi is a very good mobo, i own the Z370 and been great, i would have chosen on Z390 but simply Gigabyte seems even better.
hm, I thought 78C° is not bad if it is with all possible boosts (except OC) and under stress test?
Well the lowest i reached was 80C for the package, thats with 2500rpm fan and i can tell you its not quiet by any means, even the NF-A15 at 1500rpms are not quiet either, but yes this is under stress test, Aida64 stability test that its not likely to reach this levels unless you do render/edit a lot. That said, we are also on the coldest time of the year, i tested at 3am, the ambient temp was 13C, on summer i have days of 30C ambient... so the 9900k would be reaching 100C under those conditions. On gaming the cpu will be between 60-70C depending on your airflow and rpms.
If you are looking for a quiet gaming setup, build around 8700k, delid it with liquid metal, it would be a lot easier to cool, and go with Asus Z390 it wont matter much the vrms as with the 9900k.
