Question Graphic Card problems

[MikeW46360]

I am trying to assemble a computer for my granddaughter so that she can utilize Clip Studio Paint. I have an older PC that works fine but I need a bigger graphics card. I have a Gigabyte GA-Z77P-D3 motherboard with a I7-2600 Sandy Bridge processor. The largest GPU that I could use before upgrading my MB was a GeForce GTX 580 1.5GB because my old system did not support UEFI. This MB supports UEFI and it is enabled so I should be able to go to a bigger card. Since I'm limited to PCI-e 3.0 for the graphics slot on the MB, I'm trying to install a GeForce GTX 1070 8GB but the system will not boot with anything but the GTX 580. I also tried a EVGA RTX 3060 and I know both cards work and got the same results. I went into BIOS and changed the graphics to the MB Integrated Graphics so that I could install the latest Nvidia Drivers with the card in the PCI-e slot. When I switch the HDMI cable from Integrated Graphics to the GPU it works beautifully. I reboot to Bios with the HDMI cable in the Integrated Graphics slot and switch to the GPU again then change the Bios to automatically select GPU location. Once I shutdown, the system will not reboot. I get to the initial Bios load screen and everything locks up and I can't get any further. I'm out of ideas and looking for any help that I can find. Does anyone have any ideas for me?

ADDED
CPU: I7-2600 @ 3.4 GHz Sandy Bridge circa. 2015
Motherboard: GIGIABYTE GA-Z77P-D3
Ram: 16 GB of DDR3 at 667MHz
SSD/HDD: 1TB SSD - Kingston
GPU: Nvidia GeForce GTX 580 1.5 MB
PSU: 600 W
Chassis: Originally an HP h8-1160t
OS: Windows 10 Home 64 bit
Monitor: 32 in LG

 

[Lutfij]

Welcome to the forums, newcomer!

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
Please include the age of the PSU, apart from it's make and model.

The problem might very well be that your PSU can't cope with the higher power demands of the GPU's you're looking at or that the UEFI BIOS itself is what's preventing you from moving forward. In fact, you could disprove the latter, by dropping the discrete GPU's presumed faulty/causing issues onto a board with your PSU(provided it's not badly built and isn't on it's way out) and see if the same issue crops up with the donor platform with your existing PSU. If they do, then you can try and work with a higher quality, higher wattage unit and see if the issue perssits.

 

[MikeW46360]

Welcome to the forums, newcomer!

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
Please include the age of the PSU, apart from it's make and model.

The problem might very well be that your PSU can't cope with the higher power demands of the GPU's you're looking at or that the UEFI BIOS itself is what's preventing you from moving forward. In fact, you could disprove the latter, by dropping the discrete GPU's presumed faulty/causing issues onto a board with your PSU(provided it's not badly built and isn't on it's way out) and see if the same issue crops up with the donor platform with your existing PSU. If they do, then you can try and work with a higher quality, higher wattage unit and see if the issue perssits.

Here are the system specifications:
ADDED
CPU: I7-2600 @ 3.4 GHz Sandy Bridge circa. 2015
Motherboard: GIGABYTE GA-Z77P-D3
Ram: 16 GB of DDR3 at 667MHz
SSD/HDD: 1TB SSD - Kingston
GPU: Nvidia GeForce GTX 580 1.5 MB
PSU: 600 W
Chassis: Originally an HP h8-1160t
OS: Windows 10 Home 64 bit
Monitor: 32 in LG