> relative price to performance varies from region to region. here, the cheapest 4gb ddr3 modules will save you about 8$ compared to the cheapest 4gb ddr4 modules, which are significantly better.
> not mobo dependant. the b75 chipset has support for sata 3gb/s, which is known as sata 2. sata 3 is 6gb/s.
> dedicated pcie ssds are way more expensive than m.2 and don't perform much better. altohugh it is true that you can use m.2 to pcie adapters and be perfectly fine
> for budget builds (which is what is being discussed here, presumably) the igpus in ryzen 2200g and 2400g are perfectly usable for someone who is willing to settle, and can save 150$ +. this is why the 2200g is widely considered the best budget gaming cpu in recent history.
> for the i7 3770 that i was referring to, its 95w
dont get me wrong, old hardware is often a viable solution. in my opinion, however, its not the way to go for cpus on budget builds. say you get a 3770, and, sometime in the next few years, you think its just not good enough anymore. you're gonna need a new cpu, a new motherboard and new ram, just for one upgrade. more recent hardware is more likely to be supported for a long time (am4 is going to get new cpus, lga1155 is a completely dead platform)