Questions about Acer Nitro 5 AN515-52-76LV

There is still a 2.5" HDD/SSD SATA connection available.

I always recommend using identical RAM modules of the same size so that the memory can be operated in dual channel mode. So it is better to use another 8GB for a total of 16GB. Or directly 2x 16GB for 32GB total. PS: To find out which RAM module is compatible with the built-in memory, it is best to open the laptop and tell us the name of the built-in module.

That's always the same problem with gaming notebooks. The installation of high-performance hardware in a small housing generally leads to temperature problems. I do not think you'll find a notebook that does not get any problems with 100% CPU / GPU usage. It definitely gets hot during use and breaks down faster like a tower PC because of the load, just like any other gaming notebook. That's the compromise with these devices. I do not know that this device is especially bad.

You need DDR4 RAM and not DDR3 RAM. For example, the following product: Corsair Vengeance SO-DDR4 (1x, 8GB, DDR4-2400, SO-DIMM 260 pin)

It's in the specifications. A GTX 1050 (without Ti) with 4GB is effectively installed. -> https://www.notebookcheck.com/NVIDIA-GeForce-GTX-1050-Notebook.178611.0.html

No.

I had it unscrewed once. the 128gb M.2 runs with a sata controller, whether it swallows one with nvme I don't know. stick was probably only one of two occupied and it had a free 2.5 slot for sata drive. If you are upgrading memory, I would recommend replacing the old one anyway. Unless you find the exact same one.