To me, the GODLIKE is not really the best board model, just the most expensive one. The buyers are seen as "
whales" (no offense, see the explanation in the link). Normally i only say something when people select a board that's too low-end for a certain CPU choice, but with the GODLIKEs, it seems that the more MSI sell of those, the more they feel encouraged to set bigger and bigger profit margins with each new platform. Because no matter how much they raise the prices for these boards, they seem to get the amount of sales they want, which drives up the board prices in general. I personally see the ACE / UNIFY / UNIFY-X as the best high-end models from MSI, but in the end, it's your choice.
Similarly for the -KS CPUs, they are not the best all-around CPU if you take cost or efficiency into consideration. That's probably why plutomate said "best" in quotation marks. The -KS is a 13900K that was binned for slightly higher peak turbo clocks (+200 MHz). So it is marginally the best performance-wise, if you are willing to spend 20-25% more for 3.5% higher peak turbo clocks and a difference you won't really notice. Plus your cooling has to be absolutely top-notch, maybe a custom loop, or at least a high-end AIO.
> What is the maximum and best ram with rgb lights ?
You mean the maximum amount, or the maximum speed? Keep in mind that with a very challenging XMP profile (getting close or into the DDR5-7000-range), it can require manual adjustments to work in a stable manner. Furthermore, DDR5 doesn't like if you populate all four slots, then the maximum DDR5 speed is much lower than with two modules. So for the maximum amount where you can still have a high speed, i would choose 2x 32 GB.
> What is the best combo or just single harddrive and fastest?
There are a couple contenders, but i'd personally choose the Samsung 990 PRO (make sure to install the firmware update via Samsung Magician, if available).
> Wich power suply by Corsair is needed if with Gpu RTX 4090 MSI ?
If it's restricted to a Corsair, the HX1200 would be a fine choice. Probably the best PSU they ever made is the AX1600i, but it's highly expensive and even overkill for this system. Other manufacturers are coming out with PSU models supporting ATX 3.0 and PCIe 5.0, such as the MSI PSU linked before, or be quiet!'s new
Dark Power 13 1000W. I don't see one like that from Corsair yet, however, they offer a native ATX12HPWR cable
seperately if you want to avoid using adapters from several PCIe 8-pin power cables.