Or if it's going to a customer who is using a large enough quantity that efficency gains of a few percentage points are big savings. If Google can shave .5 per

Or if it's going to a customer who is using a large enough quantity that efficency gains of a few percentage points are big savings. If Google can shave .5 percent off their electric bill by using a more efficient cooling fan on PSU's going in to their server farms, it's worth it to spend a fair amount to realize that savings, especially since they know their usage is going to grow.