Definitely. On the other hand, many early TR boards were "gamer" boards and advertised overclocking ability. So they may have some power overhead to play with. Less overclocking ability with the old boards and the new 250W parts, of course.
AMD has reported that in actuality this chip should rarely hit 250W, essentially only if overclocked. As with the Ryzen 2 lineup, overclocking can actually hurt performance.
But you are correct that some of the more budget-oriented (and I use that term loosely) TR4 boards will struggle with power delivery. Worst case, you will shorten the lifespan of your motherboard and increase the risk of capacitor failure (eg: shorting, popping, etc).
I'm somewhat curious about what kind of cooling system Intel was using the other day with their 28 cores at 5 GHz demo/stunt. Some people isolated a frame of the streamed video where it shows the (insulated?) pipes that exit from the case and go behind the desk.
In addition to the overwhelmingly slap-dash appearance, its power draw was reportedly through the roof (north of 750W). With that chip, a fully-loaded workstation's power draw would exceed the wattage of most North American wall outlets.
Suffice to say, Intel's 5GHz 28-core chip is nowhere near production-ready and their demo is more than likely a heavily overclocked top-binned Xeon chip. In other words, Intel's new offerings are looking like less than stellar vaporware.
Threadripper 1 still beats the pants off of Intel's HEDT offerings in terms of price (Intels' costs quickly exceed the $5K mark), Threadripper 2 twists knife so much that its a gaping wound in Intel's side. The Epyc 2 lineup will similarly affect Intel's enterprise/data-center offerings.
I was pretty sure it was mostly for show and not a feasible product but nonetheless I was guessing around 500W. Without counting the chiller running under the desk.
250W should be no issue per se, even 500W for 32 is not a lot at any rate and would not be hard for a 12 phase VRM to keep it stable. It may require an extra fan
Extrapolating from Ryzen 1800X and a 16-core first-gen Threadripper, you'd overload the LGA pins at about 50% (300W) of the potentially possible ~600W you could make the chip take without sub-ambient cooling technology (and expect it to live for more than half a year at that level), i.e. with a forced-flow nucleate boiling cooler or a powerful waterblock. I once did some calculations for this, trying to find out if it could be worthwhile to wait for the 64-core EPYC and clock that one to like 3.5~3.8GHz, possibly with a governor that throttles the clock (and voltage) if the system is under low load. But assuming from some numbers I could find/calculate for how much less power they take, the predictions were so pessimistic that I did not pursue it further. (I did dream about a high-performance machine that could live in a case you could carry as a backpack, even though you'd probably not want to carry it very far due to the coolant being heavier than air.)
