Memtest86 reboots before completion

[archangel_gabriel]

Hi,

my setup looks like this:
Z790 Gigabyte Aorus Master Mainboard (latest BIOS)
Intel i9 14900kf
2 * 32GB G.skill 6400 DDR5 RAM (in Slots 2 and 4)

Last friday I swapped my RTX 4080 for a RTX 4080 Super. With the old graphics card I ran a couple of memtests without any error. With the new one it reboots the computer after 40 minutes (or one hour). I've checked the logs... no errors, normal temps for CPU and RAM.

Any ideas what could cause this behaviour?

[David (PassMark)]

Video card doesn't do much work during memory testing with MemTest86.

Maybe revert back to the old video card and confirm the video card is really the cause of the issue and it isn't just co-incidence.

[archangel_gabriel]

Unfortunately I already returned the old card.

Besides the spontaneously reboots during memtest the computer is working fine. No issues while running games, virtual maschines, 3dmark, pcmark, etc.

Very strange... btw: I tried memtest86+. Same behaviour.

[David (PassMark)]

Could try running the test with half the RAM (1 Stick at a time).