I’m not P770 owner so cannot say anything about the temperature but usually the temperature depends on notebook usage and any process which is running un the background can affect the temperature level.
Also, how can I have the best refrigeration in laptop because I am hard gamer?
Usually notebook’s cooling system should be able to cool down the CPU, GPU and other devices like HDD.
Important is that you would use the notebook on the table and should ensure that there is enough free space around the notebook to ensure air circulation and best cooling performance.
Many of my friends use additionally an cooling pad but in my opinion this should not be necessary…
Also, can I put ssd in this laptop?
I think this should not be a big problem. Important is that you would use a right SSD supporting an SATA interface.
The BIOS should be able to handle such SSD.
To be honest it is not easy to give you proper answer. The temperature is not the same on every notebook model and it depends on usage and power settings.
I don’t know what simple situation is but I presume you don’t switch on your notebook for nothing and I presume you use it for listening music. When you use it on this “simple situation” use eco mode or power saver power pln. Change cooling method option in advanced power options and your notebook will run quiet and with low hardware temperature.
When you want to play games, before you start game use high performance power plan, close all useless applications and be sure notebook’s cooling grills are not blocked. As Paolo already wrote notebook’s cooling system should be enough to cool down notebook’s hardware and allow you to enjoy your games.