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.

 

[ohio_buckeye]

Very familiar with St. Louis Microcenter. That’s where I got my 7900xtx and most of my build. May not hurt to take back the power supply and exchange it. Unfortunately they don’t have any other cards higher than a 7800xt to exchange the cards for at the moment except of couple of pro cards.

As far as the psu being a return or open box they usually will tell you at that store. I passed that store on the way home from work tonight in fact.

Here’s the psu I use with my 7900 xtx

https://www.microcenter.com/product...-fully-modular-power-supply-atx-30-compatible

 

[redcop124]

Thank you everyone for all the responses - I finally got a resolution:

Got a new power supply, and had the same issues
Tried bios flash, no luck

Then got the bright idea to try another monitor. For context I have a Samsung Odessey G9 5120x1440p ultrawide. I plugged displayport into a 27" 1080p monitor, and like magic, we have POST

Thank you everyone for the help in figuring this out. Hopefully this helps someone in the future.

TLDR: RTX 5080 out of box wouldnt post with ultrawide 1440p monitor. Trying another monitor got it to post, then install video drivers before trying the ultrawide again. Should resolve.

 

[boju]

I have a Samsung Odessey G9 5120x1440p ultrawide

Glad it worked out. Though, this same monitor did work with the 3060 before the psu swap and then also didn't right? Im not convinced it was simply the monitor for the new card, rather a display cable connection problem/ plug too big to fit properly or something else changed.

 

[Gaidax]

Wow, that's weird. Well nice to know that, I should receive my 5090 in hopefully a week or two. I am fully ready to the no POST nightmares.

 

[redcop124]

Glad it worked out. Though, this same monitor did work with the 3060 before the psu swap and then also didn't right? Im not convinced it was simply the monitor for the new card, rather a display cable connection problem/ plug too big to fit properly or something else changed.

It did yes - ive been using it with the 3060 for almost a month now. Worked with the old PSU and the new one pre swap. Same cable i was using before as well - never felt like undoing the zipties under my desk ,lol. I did try additional, and multiple, non managed cables while troubleshooting though. Even tried HDMI.
Fix seemed to be using a smaller res/non ultrawide, wondering if the preinstalled driver on the card doesnt support 49" ultrawides, ,lol

 

[ohio_buckeye]

I don’t know if you opted for it, but you may try to add their 2 year in store warranty. I’ve bought that on cards before including my 7900 xtx I got a month or so ago and the guy pretty much told me it covers anything except me throwing the gpu on the ground. I know it costs extra but definitely peace of mind dealing sign them vs trying to rma the card and mail it off if there are issues.

Either way glad you got it sorted. Almost sounds like a DisplayPort cable or something. Might check to see if there are bios updates as well. I remember when I had my 6800xt installed in my b650 board I couldn’t hardly enter the bios when plugged into the card. My 7900 xtx doesn’t have this issue.

 

[boju]

ive been using it with the 3060 for almost a month now. Worked with the old PSU and the new one pre swap.

Sorry trying to understand. So the 3060 did work with Corsair psu then? What was pre swapped, im guessing you mean before swapping to the 5080?

All good, just a little confused with this part.

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

 

[redcop124]

Sorry trying to understand. So the 3060 did work with Corsair psu then? What was pre swapped, im guessing you mean before swapping to the 5080?

All good, just a little confused with this part.

All good! It did not work yesterday with the original PSU - I think there is a possibility a SATA connector, or something wasn't seated properly on the modular power supply. I was doing so much plugging in/unplugging it's kind of hard to remember. It did however work today with that same PSU after testing it with a brand new one I purchased to test with.
The only two parts I was swapping in my testing were the power supplies and GPUs - everything else remained consistent.