I haven't built Intel PC for sometimes.
Reason why i suggested Intel CPUs is due to the iGPU in them, which is a great redundancy. Meaning that when your dedicated GPU (the unknown MSI Twin Frozr 7 Geforce GTX, which could be GTX 1650, GTX 1660, GTX 1660 Ti) should die or produce any other fault, you can connect your monitor to MoBo and use the iGPU, built-in to CPU, and still see the image and use the PC. None of the AMD CPUs have iGPU in them and it would be far harder to troubleshoot the issue of "PC boots but no image".
Though, with Intel CPU, F-suffix means that it doesn't have iGPU in it either. So, don't get F-suffix CPU, e.g i7-13700KF.
K-suffix means that CPU has unlocked multiplier and can be overclocked, when you use Z790 chipset MoBo.
As far as which CPU exactly to get, above suggestion of estimating your needs is actually a good one. Since you'd rather would have CPU cores left over/free, than coming short. E.g if you're unsure about core amounts and estimate ~10 cores, go with CPU that has 12 cores. Intel or AMD, doesn't matter much (except Intel CPUs have iGPU in them, which, to me, personally, is valuable).
Furthermore what will be your suggestion on selecting an Asus motherboard to match the CPU? I don't need WiFi. There are suggestions on Internet but I expect to hear the suggestion on this Forum.
I'd like to know if you go with Intel or AMD CPU beforehand, and which CPU exactly.
But until then, compatible MoBos would be:
If Intel CPU;
- Z790 chipset (most feature rich and also allows overclock of K-series CPU, e.g 13700K)
- Z690 chipset (you need latest BIOS in order to use 13th gen CPU, but otherwise almost same as Z790 chipset)
- H670, B660, H610 chipsets (consumer grade MoBos, that also need latest BIOS to use 13th gen CPU. Do not support CPU overclock, even when using K-suffix CPU)
If AMD CPU;
- X670E/X670 chipset (most feature rich)
- B650E/B670 chipset (consumer grade MoBos)
All AMD chipset MoBos support CPU overclock, as long as CPU has X-suffix.
E-suffix on MoBo chipset means "Extreme" and offers PCI-E 5.0 for both the PCI-E x16 slot (for GPU), and M.2 slot (for NVMe SSD), among other things.
Since your MoBo brand preference is Asus, here's what Asus offers regarding AMD 600-series chipset,
article:
https://www.asus.com/news/lqm5i7jatfojpoyy/
It is a 4K graphic card.
Prined on the card: MSI Twin Frozr 7 Geforce GTX
Take pictures of it and upload them here:
https://imgur.com/ while sharing pictures here, so we can identify the GPU.
Your GPU seems to be GTX 16-series, based on the Twin Frozr 7 cooler it has.
Sorry I made a mistake on PSU. It should be CX550M, 550 Watts. No problem purchase a new PSU. It doesn't cost much.
This PSU, at best, is mediocre quality PSU. Only good enough to power office PC without dedicated GPU. But since you plan to build high-end workstation rig, a far better and higher capacity PSU is needed.
Once we get to know what GPU you exactly have, then we can suggest the proper wattage range PSU as well. But regarding brands/models, good PSUs to go for are: Seasonic Focus/PRIME series or Corsair RM/RMi/RMx/HX/HXi/AX/AXi.
(All 3 of my PCs are also powered by Seasonic, full specs with pics in my sig.)