Hello everyone!
The graphics card did not give video, I measure voltages and everything is ok, I see a slight ripple on the PCB on the PCI side. Due to the weight of these graphics, the memory chips tend to detach from the pcb, so I do a memory test, it gives me an error in memory E0 and E1, I replace memory D0, D1 and E0, E1 to make sure. I connect the graph and it gives video, I pass the furmark test, everything is ok. I put the graphics card to sleep with a youtube video in the background and it freezes and blue screen with artifacts, restarts and works again. I turn off the pc I turn on again and it no longer gives video.
I pass the memory test again and according to the test all the memories are ok. I don't know what else to look at. Any ideas?
thanks.

Hello. First of all which memory software u used to test memories? memtune? how did you move the memtune files to the R69XT folder?
Did you reball the memories or replace the memories with new?

Yes, with memtune, the gigabyte tool, the file is hidden now I don't remember which folder it was in but to find it, I mounted an image with ubuntu desktop, inserted the hard drive with the gigabyte tool and started searching, then started again the gigabyte tool and I went into the R69XT folder and put the command "cp (here file path) . " example " cp /mnt/atidiag/memtune ." and it is copied to the folder in which you are.
The memories are from a R68XT of the same brand that work correctly.
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SOLVED: The previous technician who tried to repair it changed the bios and had a different one.