98ChemisT

Hi, I am currently studying chemistry at university in italy so i know something (not all bare in mind )
Pure Gallium is very corrosive against other metals. It attacks other metal (like aluminum or steel) diffusing into them and making their structure very fragile. The die is made by a mixture of silicon and copper (if i am not wrong) and the IHS is made of metal. So if it doesn't attack the die, it is going to attack the IHS.
Pure gallium also tend to stain other surfaces making it difficult to clean up.
Pure gallium also changes a lot his physical properties and are very strongly dependent on his temperature. His thermal expansion will change a lot depending on the temperature. For example gallium tends to expand by 3% when changes phases (when heated) so i think it will press against the IHS and the die maybe causing some damage to the chip.
On the contrary gallium compounds have different features that allows them to be used as the "liquid metal" that we all know. Plus they add some sort of stabilizer to prevent the gallium compound from reacting with your component. The manifacturer i am sure tried many recipe for making the best thermal interface material that is safe for your other component and it is stable
 
This is what i think about it and probably isn't 100% correct but it is accurate enough (And sorry if my english is bad)
 

Hi, I am currently studying chemistry at university in italy so i know something (not all bare in mind )
Pure Gallium is very corrosive against other metals. It attacks other metal (like aluminum or steel) diffusing into them and making their structure very fragile. The die is made by a mixture of silicon and copper (if i am not wrong) and the IHS is made of metal. So if it doesn't attack the die, it is going to attack the IHS.
Pure gallium also tend to stain other surfaces making it difficult to clean up.
Pure gallium also changes a lot his physical properties and are very strongly dependent on his temperature. His thermal expansion will change a lot depending on the temperature. For example gallium tends to expand by 3% when changes phases (when heated) so i think it will press against the IHS and the die maybe causing some damage to the chip.
On the contrary gallium compounds have different features that allows them to be used as the "liquid metal" that we all know. Plus they add some sort of stabilizer to prevent the gallium compound from reacting with your component. The manifacturer i am sure tried many recipe for making the best thermal interface material that is safe for your other component and it is stable
 
This is what i think about it and probably isn't 100% correct but it is accurate enough (And sorry if my english is bad)
 

Sounds good, just make sure you get a good PSU that doesn't fry your system.

Guys thanks a lot for the help
So the final build should be
- ryzen5 1600
- msi b450 tomahawk
- 450/500w power supply (80+ bronze possibly)
- 8gb ram
- case (i have just seen a cooler master MCB-B600L-KA5N-S02 for 47,99€ 1 fan included so i should buy 2 additional fans)
- ssd+hd
-1060 6gb
- monitor 200€ (1440p) or 260€ (1080p 144hz) i would decide which one after i bought all the other parts
for the building part i'm going to ask to a friend of my father which repair workstation as a job to give me a help.
 
 

That's actually the screen i have, the next gen one is much better, have a look at that instead.

I had that monitor, but i was a bit dissapointed by 75hz, it feels mostly the same as 60hz.
Here is a 144hz monitor for 260: https://www.amazon.it/AOC-G2590PX-Monitor-Speaker-Regolabile/dp/B078S36M7Y/ref=sr_1_2?ie=UTF8&qid=1535364954&sr=8-2&keywords=144hz
And here is a 1440p 60hz monitor for 200: https://www.amazon.it/AOC-Q3279VWF-Monitor-32-Nero/dp/B0777TRHPQ/ref=sr_1_3?ie=UTF8&qid=1535365033&sr=8-3&keywords=1440p
 
The AOC monitor is fine thought, so if you are happy with it it's all good.

depends on the case.
On the most normal pc cases you would have 2 fans in the front, 1 in the back.

Screenwise I'd go with 60-75 Hz, but if graphics don't mean that much to you and you like stuff like CSGO 144Hz would also be good. 
With the PSU a decent 500-550 watt +80 at a minimum of tier 3. You can get a modular one if you want, but it's mostly personal preference.
 
Ryzen loves fast ram so go for some reasonably priced fast ones (2933+)
 

1) I like the thermaltake Core V21, but there are loads of cases for 50€
2) 1080p 144hz or 1440p 60hz, depends on your use case
3) I would get a cx450m (2017) if on a budget
4)Yes, preferable get a 3000mhz ram
5) I would go for a MSI b450 tomahawk instead, costs the same as a b350, but it is better.