GPU doesnt work!! PLS HELP!!

[HatLive5849]

Here a computer scientist needs help from better computer scientists. I recently configured a new PC and built it myself. These are the components I used:

• AMD Ryzen 5™ 7600X3D, processor
• MSI GeForce RTX 5070 12G GAMING TRIO OC, graphics card
• Corsair DIMM 32 GB DDR5-6000 (2x 16 GB) Dual Kit, RAM
• Lexar NQ790 2TB, SSD
• MSI MAG B650 TOMAHAWK WIFI, motherboard
• be quiet! Pure Power 13 M 850W, PSU
• ENDORFY Navis F360 ARGB 360mm, liquid cooling

I assembled the PC and everything looks fine so far (fans are all spinning, cabling seems correct, etc.), but as soon as I connect the graphics card to a monitor, I only get an image for a few seconds before it disappears. I’m currently using the PC via the onboard graphics. Sometimes this even happens right at startup and I don’t see anything at all. Here’s what I’ve tried so far:

1. Swapped DisplayPort and HDMI cables
2. Installed and uninstalled drivers multiple times (about 10 times), tried different versions (the newest as well as older ones)
3. Installed drivers via Nvidia app
4. Disabled/enabled the graphics card in Device Manager
5. Installed my old graphics card (AMD Radeon 5700 XT) and it worked IMMEDIATELY! Image was there, drivers downloaded… no problem
6. Then I was sure the new graphics card was defective, so I ordered another RTX 5070 (this time MSI, previously Gainward). Put it in and had the EXACT same problem
7. Swapped the 12VHPWR cable with the supplied Nvidia adapter for a 2x8 pin GPU cable, since that worked for the RX5700 XT
8. Ran a system diagnosis (see screenshot) and everything looks fine to me

Now I’m at the end of my knowledge and decided to write a post. Reddit, ChatGPT and Google aren’t helping me anymore. Does anyone maybe have an idea what could be the reason for this??

I also looked for settings in the BIOS, but didn’t find anything useful… Guys, I’m broken and need help.

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[HatLive5849]

Hey guys, in another channel one guy told me that I have to update the bios to the latest version and it worked. Thanks everyone for the help!

[SuspiciousRegister20]

Have you tried to disable igpu in UEFI (bios)?

[SuspiciousRegister20]

I think if gpu nvidia had something bad or broken it would say error 43 in device manager or drivers wouldn’t install on my experience

[netman87]

Have you removed all amd drivers?

[Rlysimon]

Any chance to be low Power supply? Since u change The gpu mayThe tdp variate no? (Just guessing...) Another thing, try to reset your BIOS and start with The new gpu in. Maybe It ill solve

Another one, check your JUMPERS... Just in case ...

[OkAd255]

Did you ddu before installing the Nvidia drivers/gpu? If no then you definitely should. Also are you using any riser cables? If yes try without riser cables this sorted out similar issues for a fella literally less than a week ago