Single CPU Mode unavailable

[acreg]

Hi,
when i'm trying to check my ram, memtest86+ freezes after a few seconds. Then i read, that memtest has some problems with specific mainboards (https://www.passmark.com/forum/memte...election-modes). As a workaround you should run in "Single CPU mode".
But when i start memtest and hit c fast enough before it freezes the core selection only shows parallel, Round Robin and Sequential. All of them end in freezes. How do i get the single cpu option?
2. Question: Where do i find the log files when starting via grub?

My System:
CPU: Intel i5-3450
Mainboard: ASRock H77 Pro4
Ram: 4x4GB diffrent manufacturer

Thanks
acreg

[David (PassMark)]

Are you using MemTest86 or MemTest86+?
MemTest86+ is not our software and hasn't been updated in years.

[acreg]

My bad, i was using memtest86+.
Confusing names and packagedescriptions

Memtest86+ is based on memtest86 3.0, and adds support for recent hardware, as well as a number of general-purpose improvements, including many patches to memtest86 available from various sources.

Both memtest86 and memtest86+ are being worked on in parallel.

https://packages.debian.org/en/stretch/memtest86+

I will try out memtest86 then. There is no debian package / grub loader magic for that right? I have to build a bootable usb-stick with it?

[David (PassMark)]

There is no debian package / grub loader magic for that right?

Not that we provide. We haven't check recently what 3rd parties are doing.