[SOLVED] Is there some difference between RAM DDR3 and RAM DD3 LOT

My computers working very nice with RAM :
Kingston HyperX SAVAGE 2x8GB 1600MHz DDR3 PC3-12800 Desktop Memory;

Would my computers work nice with RAM :
Kingston HyperX FURY 2x8GB 1600MHz DDR3 DIMM Desktop Memory LOT ? - I don't know what means LOT.

if I understand well LOT means package (or set or something similar).

look online and see the difference between the Kingston HyperX SAVAGE and the Kingston HyperX FURY memory. The speed and description looks similar but check it out in depth. If they are identical except for the name then yes they likely will work.

However, if you are thinking of putting 2 different types memory in the same machine I would be very cautious to be sure they will work together. They may, or may not, be compatible.

I have two variants :
1. To put 2x8Gb new plates RAM FURY in the same machine (4 slots) that contains 2x8Gb old plates RAM SAVAGE;
2. To put 2x8Gb new plates RAM FURY in the other machine (2 slots) - unfortunately I forgot the password for Parrot Linux and can not log in;
It was a big mistake to change my password for OS - usually I am using the same password for different OS. When I installed Parrot, decided to use a different password. I did remember it for a while, but may be a month ago I stopped to log into Parrot and use MX Linux every day - this way I forgot the new password for Parrot.

So you should be able to use a live usb stick to boot the machine where you don't remember the password and then change the login password.
The process when doing so is to boot to the live usb then su to root
mount the main partition of the parrot machine to /mnt
mount -o bind /proc /mnt/proc
mount -o bind /run /mnt/run
mount -o bind /sys /mnt/sys
mount -o bind /dev /mnt/dev
chroot /mnt

Once the above is done then use "passwd username" to change the password for your user.
exit to leave the chroot and reboot to get into the parrot linux machine with your new password.

Simple enough as long as you have the machine and a live usb stick to boot from.

Then you can decide what to do with the memory -- add it to parrot or add it to your main machine.

The Fury is 1600 mhz max 1866 clock.
The savage is 1600 mhz as well but I cannot find different speed ratings.

They likely will work well together as long as you do not try overclocking them.