topic Re: New GPU (7800xt) not posting in Desktop PC / All-In-One

New GPU (7800xt) not posting

Whopzan — Wed, 04 Jun 2025 11:46:56 GMT

Hello everyone!

I just got myself a 7800xt that doesnt power up at all (using Corsair cx750 psu), no fans or anything.

The 2080S is having no problems.

Tried DDU, didnt do anything to resolve the problem.

So either the motherboard/bios doesnt accept the new cars, or the card is DOA.

Does anyone have any info about what could be wrong?

Currently using bios version 460H6W0X.105. (05/19/2020)

ERAZER Engineer X10 (MD 34944) NL<br />MSN: 1002 3887

Re: New GPU (7800xt) not posting

daddle — Wed, 04 Jun 2025 14:49:48 GMT

Hello, the newest version is Bios_b460h6-em._v107. @Major_ToM published it here

--> https://community.medion.com/t5/Operating-Systems/WHY-CAN-T-I-FIND-MEDION-BIOS-FILE/m-p/152131/highlight/true#M234

Did you add the extra 8 pin power source / yellow cables with black plugs to the graphic card? May be it gets too little power.

Cheers, daddle

Re: New GPU (7800xt) not posting

Whopzan — Wed, 04 Jun 2025 15:11:19 GMT

Thanks for the answer!

The CMD pops up and then closes down within a second. I've disabled my antivirus-programs, but it still closes just as fast as it opens.

I've tried running the flashSYS.bat with CMD as administrator, it just shows ¨10 - Error: Unable to load driver.¨

I have hopes that 107 version BIOS should fix my problem, or come to a decision on what's wrong, firmware or hardware.

I indeed did connect two 8-pin connectors for PCIE to it. So it's either BIOS that needs to be updated och the card itself that is faulty.

Re: New GPU (7800xt) not posting

daddle — Wed, 04 Jun 2025 15:22:05 GMT

@Whopzan

@Whopzan schrieb:

I've tried running the flashSYS.bat with CMD as administrator, it just shows ¨10 - Error: Unable to load driver.¨

You decompressed first the 00_Bios_b460h6-em._v107.zip into a new folder, eg C:\Bios

You did navigate the prompt within the cmd window opend as Admin to C:\ Bios

But there were some more PCs wtith the B460-EM boards which didn't succeed in flashing.

So then you have to ask @Major_ToM what to do.

Cheers, daddle

Re: New GPU (7800xt) not posting

Whopzan — Wed, 04 Jun 2025 16:13:26 GMT

I got it working!

I had to disable everything (3 tings to uncheck) in core isolation (not sure in the English word for it in Windows). Seems like a security update in 2022 began blocking amifldrv64.sys, as it's classes as an "unsafe" driver.

Then i could get the file running, and my bios is now updated!

Thanks for the help!

Re: New GPU (7800xt) not posting

daddle — Wed, 04 Jun 2025 21:57:56 GMT

@Whopzan

Congratulation! Marvellous.

What about the GPU 7800xt ? Does it work now with the updated bios?

daddle

Re: New GPU (7800xt) not posting

Whopzan — Thu, 05 Jun 2025 11:45:06 GMT

Thanks! Never been so close to regress to having sticks and stones as a hobby instead of computers!

As of now, it's still dead. I'll go test it in a friends rig on Sunday, so i know for a fact if the card is bad or not.