i've heard that

*"increasing the bandwidth won't improve game performance if you're exceeding game*. If this is true, could you please kindly comment on the following:

**max**bandwidth requirements"- Which memory type is enough (in terms of its bandwidth) for 85% of games today and will stay enough for at least 50% (rough estimation of course!) in 3-4 years :
**GDDR5X**(80-112Gb/s),**HBM**(128Gb/s),**HBM2**(256Gb/s)? - In terms of
*power consumption*there's no difference between GDDR5X and HBM (both are 1.35V), however HBM2 is 1.2V. Could you please explain this difference from the*practical*point of view? E.g. how much money can I save on electricity bills or how less TDP will my GPU generate (= potential savings on the cooling solution), etc.