It should be compatible. However the HyperX is 1600 Mhz RAM, your old ones might be 1333 Mhz, in which case they will slow the HyperX down (check with CPU-Z app). It's always better to have the same type and size of RAM in all slots.
The designation of the RAM is not clear in my eyes (and I could not find out more on the HP page). There are two different form factors for the RAM modules:
- one modules are more elongated with 240 pins (mostly more for PCs). Form factor designation: DIMM (30mm x 133mm)
- the other modules are shorter and only have 204 pins (mostly for laptops). Form factor designation: SODIMM 204 (30mm x 67mm)
It is best to take a look at the existing RAM module, then you can see pretty quickly which form factor it is. I assume that the Notbook uses SODIMM form factors, but only a look at the module can confirm this...
As far as I could find out, there is only one slot in the HP 250 G6.
However, it depends on the model of the HP 250 G6:
On HP's website you can enter the model and see the modules that fit:
http://www8.hp.com/us/en/products/laptops/product-detail.html?oid=15747807#!tab=models
Based on the technical data, the module should basically work in an IdeaPad 100. Whether it will actually work depends on whether there is a free slot in the device (the existing module may have to be removed) and whether the module fits in terms of its dimensions (height, thickness) (I had to sand down the housing of my Acer notebook a little).
The asus laptop k550jk (https://www.asus.com/Notebooks/X550JK/specifications/) uses following RAM Modules
"DDR3 MHz SDRAM, OnBoard Memory 4 GB / GB, 1x DIMM", where the DIMM socket, which is completely different from an SODIMM. I suggest to verify with Asus which memory module you can be used to ensure that it works properly before purchase.
Cheers, Alex
https://en.wikipedia.org/wiki/DDR3_SDRAM
Yes, it is. It is listed in the compatibility list on the manufacturer's website:
http://www.kingstonmemoryshop.co.uk/laptop/lenovo/lenovo-thinkpad-e550-laptop