Windows 10: Why does my pc restart randomly when playing videogames?

My pc randomly restarts itself while gaming. It has been going on for months now.It can happen multiple times a day and it can go on without restarting for days.Things I have in my system and things I have tried: I have a new graphics card MSI 4060 RtxI have a new processor Amd Ryzen 7 5800xI have 4 new sticks of ram Kingston fury beast 8 gb 3200MHz DDR4 modulesI have a new motherboard Asus Tuf Gaming B450M-Plus III have a used PSU Corsair CX 550w 80+ gold certified checkedI have a new SSD KingstonNV2 1TB M.2 PCIe NVMe SNV2S/1000GI have a new case Deepcool CC560I have a newly i

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LAG spikes while playing videogames

My internet starts to really lag randomly whenever I play videogames. My discord is fine, it doesn't seem to be affected by it, only the videogames i'm playing. Even if I stream, nothing happens to the stream, only the videogame lags. It happens constantly, random lag spikes that prevent me from playing alltogether. It's only with a few videogames and my internet is completely fine until I start a game. What could be happening? How do I solve it?

 

PC Randomly Restarting after installing new Ram!

Tried your suggestions, but still had a restart! Also ran memtest overnight (13 hours according to memtest) and had no errors! Also ran Passmark Burn in test for a couple hours testing everything and had no errors or restart. Could fitting the new ram have triggered something to go bad like my mobo or psu?

 

PC restarts randomly.

My PC reboot randomly... I already formatted the pc, the temperature is not so high and even so it restarts on its own.

This weekend, for exemple, I played euro truck simulator 2 all day, while whatching stream and it was all good. Today I also did the same thing, but when I was change the game to Battlerite, my PC rebooted in the middle of a match.

Last week I played Dragon age inquisition for 7 hours. When I stopped playing and started watching stream, it also rebooted

Also last week, I was downloading dark souls and the computer restarted, it was not doing anything at the moment besides to download dark souls.

I do not know what might be causing this problem, can you help me?

Thanks for the collaboration,

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