But with 1x PC i9 7980XE ( MB are expensive), I think that you are able to build 2 or 2.5 x PC Ryzen 9 16/32.
You write this every year :- ) And you could buy 10x i7 quad-core in 2014, which was very fashionable back than.
Anyway, the motherboards will be on same price level between these platforms this time, which is very much confirmed.
You will not buy 2-2.5x PCs. 1.5x is more accurate number.
I love the AMD's new chips but let's not stretch it into fantasy land. Full PCs are expensive in HEDT.
Case in point for PURE Nodes (cheap 50 euro GPU added):
Ryzen 9 16/32 = 900 euros (cheapest version with VAT in Europe)
64GB DDR4 = 700 euros (why 700 and not 500 ? Because of infinity fabric, let's not sacrifice performance)
MB = 250 euros
PSU+Cooler+Case+basic SSD+basic GPU = 500 euros
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Total 2350 euros
i9 7960X = 1800 euros (let's compare 16 to 16cores)
64GB DDR4 = 700 euros (except we don't need high clock here and could go for 500)
MB = 250 euros
PSU+Cooler+Case+basic SSD+basic GPU = 500 euros
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Total 3250 euros
1.4X coefficient. And that's for nodes. For high-end Workstations, it will be even less because the price of GPU will offset this into higher numbers.
Let's add GPU and it's 3000 vs 4000 euros. 1.3X coefficient.
So while 1K euro savings are HUGE, it's not
2-2.5X