First time PC builder looking for advices i assume?
Well,it depends on what you'll be using your PC in.
For gaming,pretty much everything speaks for itself.Expensive GPU means more performance.
Minimum 8GB of ram for a gaming PC,good reputed one,it really works that way. A bit of difference in CAS timing doesn't create a huge impact in performance.
CPU for gaming,4 intel cores are enough for games today,you can see an i5 in most high- end gaming machines today.Any other task than gaming,like streaming,editing and stuff can be taken care by extra threads of i7.
Choosing a PSU could be a tricky task,we've seen most of the people going cheap on PSUs,but when they are cheaper,they could be dangerous Power Boxes too,so safety first.Thanks to the people out there who put their times in creating PSU tier lists,it helps people selecting the right PSU for their RIG.
Techsites like johnyGURU etc. who test PSUs in depth.
That's Pretty much it from me.
Now to your question,
My very first PC was not made by me but i bought an already made Normal/Very Low end gaming PC.
When i first finished up building my Gaming PC
1.I was happy with each of my components,as i searched for each of them and got some knowledge before purchasing them,i made everything sure and bought all,in the hope that all the parts should work properly.
2. PSU.As i said,it can be a tricky situation as there are so many of them on the market,a good advice would be to look up the OEM of the PSU,you can trust Seasonic,EVGA today,they make good stuff.
3. Totally.
After setting up everything and starting the PC for the first time,there was no display,i though any of my components is bad,turned out that i didn't powered ON my PC. :lol:
It felt so good getting into the bios for the first time after setting up everything.