For laptop, go for i7 not only good for gaming, but it can handle years of new software with ease. The windows experience on a laptop with an i7 is similar to a good i5 desktop. This is for now. Fee years back the i7 laptop version was only slightly better than the i3 in desktops. Plus go for MSI, asus or gigabyte or alienware in laptops.
Alienware will be costly, but its way better built inside also.
MSI Tomahawk Max the one to get. Otherwise if you dont care for warranty and or price, go for higher end models in Asus. MSI Godlike is also great obviously.
MSI boards have a certain fitness and good standard electronics due to which I prefer. But my preference can change if others make better or MSI defaults. For now in z790 boards, its the best.
It would be better to upgrade to a better CPU on same mobo. AMD released new 550 and 5700 x3d cpus also with high 3d v cache which is good in gaming.
If you really want to go Intel, go 14700 with MSI board. Stable and good build of mobo and one of best warranty services.
Its just my opinion, that Gigabyte boards are trash and do cause a lot of weird new issues. But a lot of people do buy them, so who am I to judge overall. But RMA experience with Gigabyte solidified the hatred part.
Apart from that I feel(but not sure) that one or more VRMs are not getting enough current or are faulty. Have you connected 2x8 pin CPU power? Do you have a friend or someone who has a different mobo from the 600/700 series to test, if yes then thats the way to go.
You will get it. Just wait few months. Dont fall into these dumb youtubers trap.
Its called IEST, intel enhanced speedstep technology