What operating system to choose?

Question

Iron

I understand more or less, but there is a dark spot in knowledge.
Sometimes the RAM is 1.35 V , but there is 1.5V
1. How critical are these indicators for a laptop, can 1.5 not work correctly on some motherboards?
What will be the difference? Heat? Performance?
I bought a very profitable average laptop for coding (Dell Inspiron 15 3542), but 4GB is nothing, I want to change it to 8 (socket 1). According to my data, the mother will not pull anymore, and I don’t see the point.
The software claims that it currently stands:
Type DDR3
Capacity 4096 MB
Channels 1
DRAM frequency 798.1 MHz
CAS# latency (CL) 11 cycles
RAS# latency in CAS# (tRCD) 11 cycles
RAS# precharge (tRP) 11 cycles
Reversal time (tRAS) 28 cycles
Command decoding (CR) 1T
Planned to take either this one:
www.xcom-shop.ru/kingston_kcp3l16sd88_516714.html?...
or this
one www.xcom-shop.ru/kingston_kvr16s118_275284.html?ut..
Shed some light on the question

Answer 1

g dell inspiron 15 3542 upgrade ram
UPD: SODIMM Kingston HyperX Impact [HX316LS9IB/8] 8 GB

Answer 2

Hello everyone, I took the Goodram SODIMM DDR3-1600 8192MB PC3-12800 (GR1600S364L11 / 8G) RAM on exactly the same laptop, but for some reason it beeps when installed in the slot. I checked the data with the old bar (Samsung M471B5173QH0-YK0 4 GB DDR3-1600 DDR3 SDRAM) the difference is only in voltage, could this affect the installation? And also advise a budget option that is 100% suitable. Thank you. And will such a bar fit RAM Apacer SODIMM DDR3-1600 8192MB PC3-12800