Question Computer is slow and I cannot access the BIOS ?

[Danis.7]

Hey guys,
I work in IT, spending more of my time developping than assembling PCs but yesterday I assembled a computer for a friend and somehow the computer is slow while it shouldn't be compared to it's components and I'd need some help if someone already had the same issue.

Approximative computer's specs :
- Intel I9 12th gen
- KFA2 rtx 4070 TI
- 2x 8gb DDR4 3200Mhz HyperX Fury
- beQuiet 750W (Gold +)

and he also has a gigabyte motherboard but I can't remember much of it besides it's in the ATX format.

The problem with the computer is that at the first game launched (CSGO or valorant), the pc starts lagging in the game and when openning the tasks manager, the gpu is only used at 20%.
More problematic, when entering the bios, then the screen only shows a blackscreen (even when the screen is connected to the motherboard).

Otherwhise, when no games are running, the computer behaves very well and I can't figure out what could be wrong.

 

[helpstar]

check temperatures of the CPU

update the BIOS of the motherboard

was windows freshly installed on this system?

to have a look what the problem could be:
run userbenchmark.com and post the http link of your result, e.g. https://www.userbenchmark.com/UserRun/28977730

Reset the BIOS by jumper clrCMOS or JBAT or similar (eventually you will have to set the boot priority correctly after that)

check windows integrity
open the command prompt as administrator and type DISM /Online /Cleanup-Image /RestoreHealth
https://www.lifewire.com/how-to-open-an-elevated-command-prompt-2618088
https://answers.microsoft.com/en-us...em-files/bc609315-da1f-4775-812c-695b60477a93

clean boot

How to perform a clean boot in Windows - Microsoft Support

Describes how to use the clean boot process to troubleshoot a problem in Windows 8.1, Windows 8, Windows 7, or Windows Vista.

support.microsoft.com

check the memory by running memtest.org usb autoinstaller (bootable USB flash drive)

check the hard drive for errors with its manufacturer´s tool

 

[Danis.7]

I'll try thanks. and yes windows was freshly installed since it's a brand new computer.