Question Why does my new PC reboot when I launch a game?

Bad driver poor power supply any number of things system speccs?
CPU
AMD Ryzen 5 5600X
Cooler
Corsair H100x 240mm Liquid CPU Cooler
GPU
MSI GeForce RTX 3080 Ventus 3X 10GB
RAM
Corsair Vengeance RGB Pro 16GB 3600MHz DDR4
SSD
1TB Samsung 970 EVO M.2 NVME SSD
Motherboard
ASUS ROG STRIX B550-F Gaming Motherboard
HDD
1TB Seagate BarraCuda Hard Drive
Power Supply
Corsair RM850 80+ Gold Fully Modular ATX Power Supply
OS
Windows 10 Pro 64-bit
 
List all the parts your using but I would suspect the PSU.
CPU
AMD Ryzen 5 5600X
Cooler
Corsair H100x 240mm Liquid CPU Cooler
GPU
MSI GeForce RTX 3080 Ventus 3X 10GB
RAM
Corsair Vengeance RGB Pro 16GB 3600MHz DDR4
SSD
1TB Samsung 970 EVO M.2 NVME SSD
Motherboard
ASUS ROG STRIX B550-F Gaming Motherboard
HDD
1TB Seagate BarraCuda Hard Drive
Power Supply
Corsair RM850 80+ Gold Fully Modular ATX Power Supply
OS
Windows 10 Pro 64-bit
 
CPU
AMD Ryzen 5 5600X
Cooler
Corsair H100x 240mm Liquid CPU Cooler
GPU
MSI GeForce RTX 3080 Ventus 3X 10GB
RAM
Corsair Vengeance RGB Pro 16GB 3600MHz DDR4
SSD
1TB Samsung 970 EVO M.2 NVME SSD
Motherboard
ASUS ROG STRIX B550-F Gaming Motherboard
HDD
1TB Seagate BarraCuda Hard Drive
Power Supply
Corsair RM850 80+ Gold Fully Modular ATX Power Supply
OS
Windows 10 Pro 64-bit
Is your bios fully up to date?
 
Is your bios fully up to date?
CPU
AMD Ryzen 5 5600X
Cooler
Corsair H100x 240mm Liquid CPU Cooler
GPU
MSI GeForce RTX 3080 Ventus 3X 10GB
RAM
Corsair Vengeance RGB Pro 16GB 3600MHz DDR4
SSD
1TB Samsung 970 EVO M.2 NVME SSD
Motherboard
ASUS ROG STRIX B550-F Gaming Motherboard
HDD
1TB Seagate BarraCuda Hard Drive
Power Supply
Corsair RM850 80+ Gold Fully Modular ATX Power Supply
OS
Windows 10 Pro 64-bit
PSU isn't of top recommended psu's not that it isn't a recommended PSU just x model is top preferred
 
When I first started reading this thread, I, too, had a knee-jerk "uh-oh, PSU" reaction. But then you mentioned your PSU is an 850. "X" or no "x", that's a pretty powerful unit. Also, changing out a PSU is kind of a PITA, so if it were a family member, I'd highly recommend investing $15 on a PSU tester. I'm willing to bet your PSU is fine. Save your money, for now at least. Look to other thins, like making sure DirectX is up to snuff. Also, what Game is causing the PC to crash? Any other games do this? Other games play Ok? Lot of questions to be addressed before recommending you go out and spend some real bucks on a PSU.
If you'd have said, "it's a 300 watt Athena power I got for $40", then yea, that's got to be changed. But I've built many a gaming PC rig, and the PC generally places it's max load on the PSU when it boots. If you're smart, you'll get an APC 1350 Pro Battery Back Up, which will show you the load at any time. Since the game isn't going to cause a major power drain until it loads up and is playing, I'm guessing it's NOT the PSU. I have an EVGA PSU, and I would say that the PSU is NOT the place to cheap out, so if you decide to get a different one, look for one with a Single 12 Volt rail (just look at the specs), ALL Japanese solid capacitors, and personally I like it to give me 50% headroom, that is one that will never use more than Half of the load. This is where the APC is handy, look at the load under the most demanding situation you're likely to encounter, lets say it's drawing 425 watts. The you're looking at an 850. PC's rarely draw what the card manufacturers say they will. Stick with well-respected manufacturers like EVGA, Corsair, Seasonic. Avoid Thermatake, and anything "frugal".
Also, what other software might be running?
 
When I first started reading this thread, I, too, had a knee-jerk "uh-oh, PSU" reaction. But then you mentioned your PSU is an 850. "X" or no "x", that's a pretty powerful unit. Also, changing out a PSU is kind of a PITA, so if it were a family member, I'd highly recommend investing $15 on a PSU tester. I'm willing to bet your PSU is fine. Save your money, for now at least. Look to other thins, like making sure DirectX is up to snuff. Also, what Game is causing the PC to crash? Any other games do this? Other games play Ok? Lot of questions to be addressed before recommending you go out and spend some real bucks on a PSU.
If you'd have said, "it's a 300 watt Athena power I got for $40", then yea, that's got to be changed. But I've built many a gaming PC rig, and the PC generally places it's max load on the PSU when it boots. If you're smart, you'll get an APC 1350 Pro Battery Back Up, which will show you the load at any time. Since the game isn't going to cause a major power drain until it loads up and is playing, I'm guessing it's NOT the PSU. I have an EVGA PSU, and I would say that the PSU is NOT the place to cheap out, so if you decide to get a different one, look for one with a Single 12 Volt rail (just look at the specs), ALL Japanese solid capacitors, and personally I like it to give me 50% headroom, that is one that will never use more than Half of the load. This is where the APC is handy, look at the load under the most demanding situation you're likely to encounter, lets say it's drawing 425 watts. The you're looking at an 850. PC's rarely draw what the card manufacturers say they will. Stick with well-respected manufacturers like EVGA, Corsair, Seasonic. Avoid Thermatake, and anything "frugal".
Also, what other software might be running?
Exactly why i said it is still a good psu i do still recommended this psu. The issue i think is would be is the bios
Apologies I've just been very frustrated trying so many different ways to fix this issue. My PC is just over 2 weeks old so would it not already have the latest bios update?
It's alright
As for the bios yes it can just be the bios update and settings in the bios with it. I would do the update. Enable xmp if intel or docp if amd. Things are are simple to go over they just need to be gone over step by step
 
When I first started reading this thread, I, too, had a knee-jerk "uh-oh, PSU" reaction. But then you mentioned your PSU is an 850. "X" or no "x", that's a pretty powerful unit. Also, changing out a PSU is kind of a PITA, so if it were a family member, I'd highly recommend investing $15 on a PSU tester. I'm willing to bet your PSU is fine. Save your money, for now at least. Look to other thins, like making sure DirectX is up to snuff. Also, what Game is causing the PC to crash? Any other games do this? Other games play Ok? Lot of questions to be addressed before recommending you go out and spend some real bucks on a PSU.
If you'd have said, "it's a 300 watt Athena power I got for $40", then yea, that's got to be changed. But I've built many a gaming PC rig, and the PC generally places it's max load on the PSU when it boots. If you're smart, you'll get an APC 1350 Pro Battery Back Up, which will show you the load at any time. Since the game isn't going to cause a major power drain until it loads up and is playing, I'm guessing it's NOT the PSU.

I was questioning if it was the PSU too as the game (Fortnite) that makes the PC reboot 99% of the time when launching uses 2 different launchers. BattleEye and and EasyAntiCheat. I can play the game fine if it boots with BattleEye. It’s launched dozens of times using BattleEye and i’ve played for hours with no issues. However it keeps forcing me to use EasyAntiCheat which makes my PC reboot almost every time. The fact it could run the game fine made me doubt it was the PSU. I contacted Epic and they tried everything to get EAC to work, none of it helped. Then I tried to launch two other games, GTA V and Call of Duty Cold War. Both launched multiple times problems, however. Call of Duty Cold War did make my PC reboot when launching twice but every other time it was fine and I could play it for hours also with no issues. This is my first PC and I have little knowledge in this area so I’m lost as to what the issue is. Also am I looking at the right thing? A APC 1350 Pro Battery Back Up is $200?
 
Exactly why i said it is still a good psu i do still recommended this psu. The issue i think is would be is the bios

It's alright
As for the bios yes it can just be the bios update and settings in the bios with it. I would do the update. Enable xmp if intel or docp if amd. Things are are simple to go over they just need to be gone over step by step
Ok thank you I will try this.
 
When I first started reading this thread, I, too, had a knee-jerk "uh-oh, PSU" reaction. But then you mentioned your PSU is an 850. "X" or no "x", that's a pretty powerful unit. Also, changing out a PSU is kind of a PITA, so if it were a family member, I'd highly recommend investing $15 on a PSU tester. I'm willing to bet your PSU is fine. Save your money, for now at least. Look to other thins, like making sure DirectX is up to snuff. Also, what Game is causing the PC to crash? Any other games do this? Other games play Ok? Lot of questions to be addressed before recommending you go out and spend some real bucks on a PSU.
If you'd have said, "it's a 300 watt Athena power I got for $40", then yea, that's got to be changed. But I've built many a gaming PC rig, and the PC generally places it's max load on the PSU when it boots. If you're smart, you'll get an APC 1350 Pro Battery Back Up, which will show you the load at any time. Since the game isn't going to cause a major power drain until it loads up and is playing, I'm guessing it's NOT the PSU. I have an EVGA PSU, and I would say that the PSU is NOT the place to cheap out, so if you decide to get a different one, look for one with a Single 12 Volt rail (just look at the specs), ALL Japanese solid capacitors, and personally I like it to give me 50% headroom, that is one that will never use more than Half of the load. This is where the APC is handy, look at the load under the most demanding situation you're likely to encounter, lets say it's drawing 425 watts. The you're looking at an 850. PC's rarely draw what the card manufacturers say they will. Stick with well-respected manufacturers like EVGA, Corsair, Seasonic. Avoid Thermatake, and anything "frugal".
Also, what other software might be running?

I seen NVIDIA reccomended a 750W PSU for a 3080, as I was paring it with a R5 5600x for the time being which has a 65W power draw I believe I thought 850W would be plenty until I upgrade. What do you mean by what other softwares might be running? How would I check this?
 
I was questioning if it was the PSU too as the game (Fortnite) that makes the PC reboot 99% of the time when launching uses 2 different launchers. BattleEye and and EasyAntiCheat. I can play the game fine if it boots with BattleEye. It’s launched dozens of times using BattleEye and i’ve played for hours with no issues. However it keeps forcing me to use EasyAntiCheat which makes my PC reboot almost every time. The fact it could run the game fine made me doubt it was the PSU. I contacted Epic and they tried everything to get EAC to work, none of it helped. Then I tried to launch two other games, GTA V and Call of Duty Cold War. Both launched multiple times problems, however. Call of Duty Cold War did make my PC reboot when launching twice but every other time it was fine and I could play it for hours also with no issues. This is my first PC and I have little knowledge in this area so I’m lost as to what the issue is. Also am I looking at the right thing? A APC 1350 Pro Battery Back Up is $200?
I honestly doubt it's the psu it's just one of the first thing's we all like to look at to make sure it's not just random power issues. Bios support for your cpu and mobo are minimal on the bios it is sold with updating the bios will help with the compatibility between windows and your system so updating directx and drivers things like that will go smoother. As for csgo and certain other games causing you system to crash not other games that sounds, like more or less netframe work 2.0/2.5 isn't installed. And netframe work 3.0-4.0 i think it is "yes windows autos installs it" but it dosn't install it for some reason every "EVERY EVERY EVERY" windows 10 system that has said it has installed them that i build still tells everyone they have to install them when i get them to them so i just staryed doing it myself now on every system.
 
I honestly doubt it's the psu it's just one of the first thing's we all like to look at to make sure it's not just random power issues. Bios support for your cpu and mobo are minimal on the bios it is sold with updating the bios will help with the compatibility between windows and your system so updating directx and drivers things like that will go smoother. As for csgo and certain other games causing you system to crash not other games that sounds, like more or less netframe work 2.0/2.5 isn't installed. And netframe work 3.0-4.0 i think it is "yes windows autos installs it" but it dosn't install it for some reason every "EVERY EVERY EVERY" windows 10 system that has said it has installed them that i build still tells everyone they have to install them when i get them to them so i just staryed doing it myself now on every system.

So you recommend that I do a clean install on my gpu driver, update my bios and directx and install net frame 2.0/2.5? If so how would I do the last two?
 
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I would put money on it being the psu. Although the RM (non x) range are high quality psu’s but perform below average with its transient response performance. There is more to a psu than a wattage rating. It’s well documented that the 3080 and 3090 can have significant spikes in load and a psu with anything other than very good transient response performance can have issues. As I said before there have been many threads on here with an RM psu causing these types of issues with a 3080 or 3090.