What were the specs to your build prior to the upgrade? What are the specs to your build at this moment of time? You should provide your specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Peripherals:
we should be seeing two sets, one for before and one for after. Include the age of the PSU if it's being recycled and the age of the drives.
As for your build, did you reinstall your OS? Speaking of OS, if you're on Windows 10 you should recreate your bootable USB installer using Windows Media Creation Tools before reinstalling your OS. You're advised to use the latest drivers from Nvidia's support site.
My new specs are as followed
CPU: Intel i3 10100f
Motherboard: MSI MAG torpedo z590
Ram: Corsair vengance 3200
Ssd/HDD: I have multiple. 3 ssds. Kingston a400, kingston 80gb old drive I don't use but has no bad sectors. And an Intel 120gb SSD. I then have a m.2 and a 1tb HDD
GPU: Asus strix 970
PSU: gigabyte 700 watt semi modular (bought only a couple months ago)
Case: cooler master masterbox nr600
Os: windows 10 pro
Peripherals: standard Logitech office keyboard, hyper X headphones but haven't plugged them in yet and a Logitech g203 mouse
The old pc was like this
Cpu: intel Xeon x5660
Motherboard: gigabyte ud5 x58
Ram: mis matched ram but triple channel at 2133 speed
Ssd/HDD same exact as above but I wiped them all before I installed a new os on them using my bootable windows 10 drive
GPU: gtx 970
PSU: same gigabyte 700 watt semi modular PSU
Case, os and peripherals also all stay the same