I got new parts to build pc. Ryzen 5 300. Ddr4 3200. Asrock b450 steel legend. M.2 sx8200 pro. Evga supernova 550g2 and gtx 1660ti. I put everything up. Everything is connected. I start pc, its starts then after 5 seconds restarts. I cant even access bios. Tried to do with out gpu. Tried with...
forums.tomshardware.com
I just read your other thread about this. People have told you that the board might need a BIOS update and you talk like you're desperate and that building a computer isn't for you.
If you give up because you didn't know that the B450 motherboard will need a BIOS update if there is no sticker "Ryzen 3000 ready" on the motherboard box it's kinda on you. Not on how easy or hard it is to build a computer. Putting the hardware together is so easy. You're talking compatibility between the parts.
Whoever told you that the B450 Legend motherboard was optimized for the Ryzen 5 3600 from the start lied to you. The motherboard is perfectly fine to run a Ryzen 5 3600 IF IT HAS THE BIOS UPDATE.
The only way you can update the BIOS is if you have another CPU that is supported by the B450 Legend out of the box. Like a Ryzen 1600 or 2600. AMD can even lend you a CPU kit that you have to return to them just to update your BIOS.
https://www.amd.com/en/support/kb/faq/pa-100#faq-Short-Term-Processor-Loan-Boot-Kit
If you go the Pre-Built route you will have cheap parts like the PSU and GPU and motherboard. They buy the cheapest there is and they sell you the system with a few hundred dollars extra.