10:17:34 <sech1> https://twitter.com/VideoCardz/status/1198889513042530305
10:29:22 <sech1> 64-core Threadripper will be even more memory-bound than 3950X. 64 cores and 4 memory channels vs 16 cores and 2 memory channels.
10:55:53 <Inge-> 32-core threadripper more sweet-spot-ish?
11:16:58 <hyc> 2000GB/s L1 cache sounds like an incredbile jump in perf
14:08:44 <sech1> 3dnews.ru keep testing new CPUs in RandomX (10980XE this time): https://3dnews.ru/assets/external/illustrations/2019/11/25/998360/chart-4.png
14:09:53 <p3rL> i'll beat them all with my Xeon <3
18:09:58 <tevador> the 24 core threadripper will probably top out around 25 KH/s and the 32- and 64-core parts won't offer much improvement over that
18:11:04 <p3rL> which model
18:41:35 <luigi1111w> sech1 is "memory-bound" bandwidth?
18:41:59 <luigi1111w> and if so are the skylake-x cpus using quad channel in those tests?
18:43:27 <tevador> no, not bandwidth, but MT/s (transactions per second)
18:44:19 <tevador> if you read how DRAM works, you'll see that it takes some time to open/close the memory row, which limits how many random reads you can make per second
18:45:17 <tevador> that's why overclocking the RAM won't help much, but tighter timings help
21:17:05 <sech1> Interesting... https://bitcointalk.org/index.php?topic=5176747.msg53179227#msg53179227
21:17:25 <sech1> 14KH/s @150 Watts at the wall
21:20:33 <tevador> cool, 93 H/J
21:20:46 <tevador> depends on the price, though
21:22:46 <sech1> Regular PC components can also achieve this efficiency, but after lots and lots of tuning
21:22:53 <sech1> and probably not at 14 KH/s
21:23:13 <tevador> yeah, I tuned my 3700X to 95 H/J
21:23:21 <tevador> 3900X can probably do >100
21:23:56 <sech1> Their custom BIOS probably has built-in tuned timings for RAM they use + fixed clock and voltages for CPU
21:24:04 <tevador> but 14K @ 150W sounds like a good sweet spot
21:24:40 <gingeropolous> uh oh, its an asic!
21:24:57 <sech1> I always told 3900X is RandomX asic
21:25:01 <sech1> this is just packaging
21:25:22 <sech1> it even has "X" in the name!
21:25:37 <gingeropolous> i knew you guys worked for amd
21:25:57 <sech1> Where's my payroll then? Ehh?
21:26:09 <gingeropolous> i dunno. your prolly gettin paid on MOENRO! SO WE"LL NEVER SEE IT
21:27:09 <gingeropolous> man. it feels like we're about to witness the final battle after a long war.
21:27:35 <gingeropolous> well no. shame on me. ive never seen war. internet, delete that statement.
21:32:03 <tevador> 7x7 inches sounds like a micro ITX board with pico PSU
21:32:24 <sech1> these boards are not cheap
21:33:08 <sech1> 7x7 is mini-ITX
21:33:22 <tevador> yeah, I meant mini itx
21:33:48 <sech1> 2 times the price of micro-ATX boards
21:35:13 <tevador> they could probably sell this machine for $1000
21:36:01 <tevador> so now we know the reason for the shortages of 3900Xs :P
22:01:01 <tevador> btw it looks like the 10x faster share verification with RandomX will reduce the operating costs of pools, which is a good thing for decentralization
22:26:25 <jtgrassie> ^ yes
23:32:31 <luigi1111> tevador: thanks