Question 5080 not POSTing/no display after upgrading ?

[redcop124]

5080 not posting/no display after upgrading

Spent all day troubleshooting after spending all morning in line at microcenter, lol
Upgraded to the MSI Ventus 5080 from a 3060
Upgraded my 500W PSU to the Corsair rm1000x
No other changes were made to PC, other parts are:
Ryzen 5 5600X
GSKILL TridentZ 32GB (x4 8GB) @3200 mhz
MSI B550M Pro-VDH WiFi motherboard

Troubleshooting steps
-replace GPU with existing 3060, run a pcie connector to it - still not video or post
-Reseat RAM - no change
-Remove all drives but the boot drive - no change - left in this configuration for troubleshooting
-with 3060 installed, run old power supply outside case to test - pc boots up fine
-install 5080 drivers, shut down PC, swap power supplies and install 5080 - still no video or post
-reseat CMOS battery to reset bios - no change
-with pc powered on, test voltage with multimeter on GPU power cable - getting 12V

To note, all fans on the GPU and the pc will spin, lights on ETC
Board indicators start with CPU light for a few secs, then move to VGA light, before sometimes settling on the boot light staying on, the lights going away with no video still.

I’m thinking power supply is the issue. Motherboard, RAM, CPU all fine due to boot up with other card/PSU.
Can’t test the 5080 on the old PSU due to lack of connections. What do you guys think?

 

[Lutfij]

Welcome to the forums, newcomer!

install 5080 drivers, shut down PC, swap power supplies and install 5080 - still no video or post
It doesn't work like that. You use DDU to remove all GPU drivers(Intel, AMD and Nvidia) while on your older GPU, then power down with the wall outlet turned off, disconnect old GPU from the system and then replace with new GPU.

Board indicators start with CPU light for a few secs, then move to VGA light, before sometimes settling on the boot light staying on, the lights going away with no video still.
This would tell me it's a BIOS issue. Are you working with a PCIe riser cable?

While you're on your older GPU, can you check and see what BIOS version you're on for your motherboard?

 

[boju]

Troubleshooting steps
-replace GPU with existing 3060, run a pcie connector to it - still not video or post

Sounds like something regarding psu/cables isn't connected right. Since it's modular, you are connecting both split ends of the atx 24pin cable to the psu yeah?

 

[SkyNetRising]

Upgraded to the MSI Ventus 5080 from a 3060
Upgraded my 500W PSU to the Corsair rm1000x
What do you guys think?

Was old PSU also modular?
Did you replace all modular PSU cables with new ones?

Modular PSU cables are not compatible between different PSU models.
Using wrong cables will damage/kill hardware connected.

 

[redcop124]

Welcome to the forums, newcomer!

install 5080 drivers, shut down PC, swap power supplies and install 5080 - still no video or post
It doesn't work like that. You use DDU to remove all GPU drivers(Intel, AMD and Nvidia) while on your older GPU, then power down with the wall outlet turned off, disconnect old GPU from the system and then replace with new GPU.

Board indicators start with CPU light for a few secs, then move to VGA light, before sometimes settling on the boot light staying on, the lights going away with no video still.
This would tell me it's a BIOS issue. Are you working with a PCIe riser cable?

While you're on your older GPU, can you check and see what BIOS version you're on for your motherboard?

I will try that with DDU - I’ve upgraded GPU’s before and haven’t had to do that. Will give it a shot. Will figure out BIOS version. No riser cable.

 

[redcop124]

Sounds like something regarding psu/cables isn't connected right. Since it's modular, you are connecting both split ends of the atx 24pin cable to the psu yeah?

I am! Split end on modular / I’ve reconnected everything probably 25 times now.

 

[redcop124]

Was old PSU also modular?
Did you replace all modular PSU cables with new ones?

Modular PSU cables are not compatible between different PSU models.
Using wrong cables will damage/kill hardware connected.

Old PSU was not modular
All cables used were included with the PSU

 

[boju]

So old psu works as normal and Corsair doesn't. Unless you're missing something obvious which atm doesn't look like it, rma the psu for an exchange.

Where did ya get the Corsair psu from?

 

[redcop124]

So old psu works as normal and Corsair doesn't. Unless you're missing something obvious which atm doesn't look like it, rma the psu for an exchange.

Where did ya get the Corsair psu from?

Got it form Microcenter in St Louis - I’ll probably go pick one up locally at Best Buy or something and if that works I’ll return the bad one
Another thought I’ve had is BIOS update - wondering if the board is having a hard time recognizing the new GPU with gen 5 pcie and/or the GDDR7

 

[SkyNetRising]

wondering if the board is having a hard time recognizing the new GPU with gen 5 pcie and/or the GDDR7

You could try forcing PCIE mode into Gen4 or Gen3 and see, if that changes anything.

I've seen reports on RTX 5080 having problems in PCIE 5.0 mode.
But your board supports up to PCIE Gen4 only.

 

[boju]

Got it form Microcenter in St Louis - I’ll probably go pick one up locally at Best Buy or something and if that works I’ll return the bad one
Another thought I’ve had is BIOS update - wondering if the board is having a hard time recognizing the new GPU with gen 5 pcie and/or the GDDR7

Yeah good idea buying it locally and returning the other. Who knows what happened to the psu you got if it was a return or not, someone plugging wrong cables and shorting it out.

No matter the graphics card gen, pcie is backwards compatible or should still be the case. Can always force gen 3 or 4 using your old card prior. But, the 3060 doesn't work with the Corsair psu so there's that. If only you could try the old psu with the new card but i don't think that has the necessary amount of pcie 8 pins to complete the 12vhpwr adapter. Just to see it post at bios, be hardly any power draw there, just to see bios.