Question best power supply for this first & last build?

these are the best items that has been recommended for this first last build
  1. mobo = b450 tomahawk
  2. cpu/gpu = amd 2200g igpu
  3. ram = going for 16 or 32 or 64 ram, doesnt seem like anything about ram really matter besides the amount
  4. ssd/hdd = any ssd or hdd would do (there has not been any good tests or analysis from anyone that ssd is any faster than hdd for using youtube, or using chrome)
  5. mini-case = case is decided after right?
what's best power supply for this?

just link with basically why its best
 

R_1

Expert
Ambassador
1 looks good
2 again looks fine
3 b450 is a ryzen system and ryzen loves all the bandwidth you can give it, especially the in built GPU which shares the RAM. speed is also a major factor with ryzen. do not choke the CPU with a lot of slow donkey RAM.
4 true no real help with youtube, but chrome will load off of an SSD faster, windows will boot off an SSD faster and everything on an SSD will be accessed faster. your entire computer usage will be sped along and its torturous going back to a HDD once you have had an SSD.
5 FYI the case may dictate which PSU you can use. smaller cases like what you want may require a SFF PSU, eliminating @90% of your choices. (made up the number but its a vast majority of the units are ATX) you may get a good PSU then the case forces you to change, eyes open as to the different PSU form factors and specs.

for an ATX unit you cannot go wrong with an EVGA G2/G3 7-10 year warranties.
corsair RMx or TXm 7-10 year warranties
seasonic focus gold prime 10 year warranties

keeping the system with in spec power is key to longevity, do not skimp on the unit feeding your system