10:23:37 A bit of recreational math: https://paste.debian.net/hidden/c43e2081/ 10:23:48 This whole mining operation wasn't really profitable to Bitmain 10:23:58 unless they found really cheap electricity in Hong Kong 10:24:43 hmm, why did I count 44 months 10:24:50 it should be 20 months 10:25:33 anyway, even with 20 months, both mined XMR and spent $$$ will have the same proportion 10:44:03 The machines may be hosted somewhere where electricity cost is cheaper, but even in the cheapest location it would still be about 4M for power (for 44mo) 10:46:34 we really need to know how expensive the thing is 10:46:48 this would only make sense if they can make then realllll cheap iGuess 10:48:40 https://matrix.monero.social/_matrix/media/v1/download/matrix.org/qoqZyIAugoAnWQLpmlhgnucf 10:49:01 "There is no official prices from Bitmain but many providers are showing similar prices" 10:51:16 Which would mean ~66 H/s/$, compared to ~20 H/s/$ (ish) for a Ryzen rig 10:51:19 (assuming ~1000$ for 20 kH/s) 12:08:21 They can dump it for any price, really. It looks more like a firesale for this specific project 12:11:33 endor00: 1000$ for 20 kH/s? Ryzen 5900X costs €350 on amazon and does 17 kH/s 12:12:04 xfedex and what about the rest of the entire rig? :D 12:15:12 I guess you can get a good and fast RAM stick with 100€, and 150€ for a motherboard, plus an ugly case, plus power supply and stuff you should be able to make it for €600 12:21:14 That's already €600 before the psu (a decent one will be another €100) and case, plus a decent cpu cooler, plus some basic storage (though technically you could run it off of a usb stick). So we're in the €800 range - and that's assuming that you can actually find stuff that cheap in your area 12:22:59 So on a good day we're looking at ~25 H/s/$ - still less than half 12:26:46 you don't need a decent cpu cooler if you're optimizing for power efficiency 12:27:01 5900X will be using no more than 60 watts 12:27:27 any AMD stock cooler will do 12:28:19 But then you're also cutting down on the hashrate, which will reduce your H/s/$ figure, right? 12:29:41 h/s/watt is more important 12:30:29 Like I said, Bitmain can put any price on these devices 12:30:38 for them, it's a scrap that they need to dump 12:31:05 Of course, I was just comparing the hashrate cost 12:31:29 How many hashes does a power optimized 5900x do, typically? 12:46:21 ceetee: https://xmrig.com/benchmark is your friend 12:47:52 yes but he asking for power optimized 12:49:44 my 3900x somewhat power optimized at 3.8GHz and 1.0125v(?) gets ~14.6Kh/s 12:51:23 with b die? 12:51:57 yes, ram optimized 12:53:31 thanks nioc 12:53:38 yw :) 12:57:15 The benchmark site gives figures I've always found hard to replicate. A 16 core EPYC 7313 is listed at 15 kH/s when out of the box I found it more around 9 kH/s so detailed config/tuning is key to obtaining the displayed performance. 13:01:38 if I let my CPU run stock I get similar HR but the cpu power draw is 2x and it runs very hot 13:25:20 Extrapolating some numbers from here: A 5950x can be had for as little as 420€ in deals, with mainboard (100€), 2x8GB B die (70€) and a boot USB stick (10€) you get about 20kH/s for 600€, power draw should be less then 100w. That means a single high efficiency platium power supply (120€) can be shared between multiple boards. You'd also need a few land cables and a cheap switch (40€) 13:25:20 4x 5950x should have a combined hash rate of 80kH/s, and the entire setup would cost about 2600€ (= 2800 USD) if one can get away without buying cases. 13:25:21 So in total 28.5H/s/$ seems possible. I thought it would be even cheaper, but had some numbers mixed in my head. 13:26:41 Just trying to put the bitmain thing in perspective with current hardware prices 16:07:24 it seems likely they can beat off the shelf PC pricing 16:07:37 they can't beat power cost