Properly setting BAD RAM in GRUB

lately I've started to experience instability with my system. At first, I suspected high temps, bad drivers, and so on... In the end I've decided to try Memtest86+, here is the result after 1 hour, with the BAD-RAM format selected. First of all I want to specify that I can't change the RAM, it's soldered on the MOBO, I just want to have a normal experience with my device until I'm able to get a new one. badram= 0x0000000232848000,0xfffffffffffff040, 0x0000000232849040,0xfffffffffffff040, 0x000000023284a000,0xfffffffffffff040, 0x000000023284b060,0xfffffffffffff060, 0x000000023284c040,0xffffffffffffd440, 0x000000023284c420,0xffffffffffffe520, 0x000000023284d110,0xfffffffffffff550, 0x000000023284e020,0xffffffffffffe528, 0x000000023284e020,0xffffffffffffe020, 0x000000023284f000,0xfffffffffffff040 My problem: I want to set somehow the **GRUB_BADRAM** variable in the etc/default/grub file. What I've tried: 1. GRUB_BADRAM="0x0000000232848000,0xfffffffffffff040,0x0000000232849040,0xfffffffffffff040,0x000000023284a000,0xfffffffffffff040,0x000000023284b060,0xfffffffffffff060,0x000000023284c040,0xffffffffffffd440,0x000000023284c420,0xffffffffffffe520,0x000000023284d110,0xfffffffffffff550,0x000000023284e020,0xffffffffffffe528,0x000000023284e020,0xffffffffffffe020,0x000000023284f000,0xfffffffffffff040" for short, the result of memtest, just in a one-liner. Result? Not being able to boot at all, needed to use a live USB to comment out the line and do a update-grub command. 2. Being that the detected bad RAM ranges seem rather small I wanted to cover the whole range with just one address-mask pair: 0x0000000232848000 and the mask ... ? I don't really understand how it works TBH. Thanks!