Hello! Based on your description, it seems like you are looking for an additional 8GB RAM stick with the same specifications as your current Samsung M425R1GB4BB0-CWMOL 8GB 5200MHz module. It's great that you want to upgrade your laptop's memory for better performance.
Unfortunately, finding an exact match for that specific Samsung RAM model may be challenging, especially if you are looking for a new module. Since you mentioned that a RAM kit is too expensive for your budget, you may need to consider alternative options.
One option is to look for a used or refurbished Samsung M425R1GB4BB0-CWMOL 8GB 5200MHz RAM stick online. Websites like eBay, Amazon, or local tech forums might have listings for individual RAM sticks that match your current module.
Another option is to look for a compatible RAM stick from a different brand with similar specifications. You can search for DDR4 8GB 5200MHz RAM modules that have similar timings and voltage to ensure compatibility with your existing RAM.
Before making a purchase, make sure to check your laptop's specifications and compatibility requirements to ensure that the new RAM stick will work properly with your system.
If you have any more questions or need further assistance, feel free to ask!