Personal computing discussed

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by just brew it!
Sun Jul 28, 2019 1:17 pm
Forum: The Back Porch
Topic: To Lease or too buy an EV
Replies: 664
Views: 12258

Re: To Lease or too buy an EV

I'm curious to know how it "blew up" because that's not something batteries do, they generally have a slow burn. What did Hyundai put under the hood, or rather in the front of the car in this case lol. Lithium-ion batteries in thermal runaway emit hydrogen gas. If the "slow burn"...
by just brew it!
Sat Jul 27, 2019 7:29 am
Forum: The Back Porch
Topic: To Lease or too buy an EV
Replies: 664
Views: 12258

Re: To Lease or too buy an EV

Another interesting angle, seems to be a rough period for the Auto industry: https://arstechnica.com/cars/2019/07/nissan-plans-12500-layoffs-after-operating-profits-fall-98-percent/ If the entire industry is over-saturated and/or in a slump, that's a pretty bad time to be trying to turn an unprofit...
by just brew it!
Thu Jul 25, 2019 6:00 pm
Forum: The Back Porch
Topic: To Lease or too buy an EV
Replies: 664
Views: 12258

Re: To Lease or too buy an EV

Larger than expected loss, declining gross margin, co-founder/CTO resigning... these are not signs of a healthy company. Where's the tipping point, when prospective customers lose enough confidence in the company's ability to survive and stand behind their products that sales start to tank? That wou...
by just brew it!
Thu Jul 25, 2019 8:49 am
Forum: The Back Porch
Topic: What are you listening to RIGHT NOW?
Replies: 4216
Views: 599643

Re: What are you listening to RIGHT NOW?

Things that make you go "Whoa... WTF?"

https://www.youtube.com/watch?v=P4W4vzDRcY8

The sh*t eating grin at 1:12 is priceless.

Edit: Sorry, original link was messed up and started in middle of video. Fixed.
by just brew it!
Mon Jul 22, 2019 3:28 pm
Forum: Developer's Den
Topic: Weird bug and weirder solution...
Replies: 6
Views: 287

Re: Weird bug and weirder solution...

FWIW the odds of weird race conditions multiplies exponentially if the application makes use of multi-threading and fails to employ mutexes where appropriate. Moving to a host with more cores/threads will tend to exacerbate these types of issues. Edit: A significant chunk of my day job is chasing bu...
by just brew it!
Mon Jul 22, 2019 1:17 pm
Forum: Developer's Den
Topic: Weird bug and weirder solution...
Replies: 6
Views: 287

Re: Weird bug and weirder solution...

Sounds like a race condition. There is some transient state which is preventing the e-mail attach code from successfully opening the file; adding the extra debug code delays execution of the e-mail attach operation just enough that you're no longer hitting the problem. Race conditions are unpredicta...
by just brew it!
Sun Jul 21, 2019 9:26 pm
Forum: The Back Porch
Topic: To Lease or too buy an EV
Replies: 664
Views: 12258

Re: To Lease or too buy an EV

dragontamer5788 wrote:
It takes money to make money: Tesla must spend money buying equipment before that Shanghai factory can come online.

...and if it is coming online without direct investment from Tesla, then someone else owns it.
by just brew it!
Sun Jul 21, 2019 1:54 pm
Forum: The Back Porch
Topic: cancel sub - receipts@techreport.com not a valid email address?
Replies: 7
Views: 462

Re: cancel sub - receipts@techreport.com not a valid email address?

For the time being, the most effective way is probably to PM drfish (assuming you haven't been caught in the broken IP ban filter, and unless he has a better suggestion). The contact form comes to me, but also constantly receives tons of spam from bots. I'm attempting to weed out the legit requests/...
by just brew it!
Tue Jul 16, 2019 2:38 pm
Forum: The Back Porch
Topic: 50 Years Ago - At This Minute
Replies: 22
Views: 408

Re: 50 Years Ago - At This Minute

It was 50 years ago today, Sgt. Pepper taught the band to play... Released 26 May 1967. Yellow Submarine and Abbey Road were released in 1969. I just could not resist. :D If you really want a Sgt. Pepper / space themed mash-up, there's nothing better than this: https://www.youtube.com/playlist?list...
by just brew it!
Tue Jul 16, 2019 10:44 am
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 4529
Views: 189014

Re: DYMT: Imi's Legacy

Ahh, yes... the old "make it someone else's problem" trick! :wink:
by just brew it!
Tue Jul 16, 2019 6:20 am
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 4529
Views: 189014

Re: DYMT: Imi's Legacy

Still feels weird sometimes to spend all day writing test code instead application code, but it's usually worth it. I suspect a fairly long stretch of this is in my future as well; the tests for the subsystem I currently help maintain could stand some improvement - can't they always? - and it's on ...
by just brew it!
Sat Jul 13, 2019 11:12 pm
Forum: The Back Porch
Topic: What are you listening to RIGHT NOW?
Replies: 4216
Views: 599643

Re: What are you listening to RIGHT NOW?

The Aristocrats - You Know What...? (2019) Another great release from this phenomenal instrumental power trio. https://www.youtube.com/playlist?list=OLAK5uy_kviDw6px-_rPr4IXu0KTEykkwmI7zhb1U (Gotta love the "Parental warning explicit lyrics" notice... the album is entirely instrumental... ...
by just brew it!
Fri Jul 12, 2019 10:53 am
Forum: General Hardware
Topic: cables/wires for custom USBs
Replies: 7
Views: 363

Re: cables/wires for custom USBs

Digi-Key has been one of my primary sources for components, cables, connectors, etc. for most of my life. In pre-internet days I ordered out of their print catalog via snail mail. They were the discrete electronics components version of the Sears catalog!
by just brew it!
Fri Jul 12, 2019 10:11 am
Forum: General Hardware
Topic: cables/wires for custom USBs
Replies: 7
Views: 363

Re: cables/wires for custom USBs

You're dealing with transmission lines for RF frequencies here, so you need to pay careful attention to characteristic impedance to avoid reflections which will degrade signal integrity. Ethernet twisted pair is 100 ohm, while USB is 90 ohm. Close enough that it should work... most of the time... bu...
by just brew it!
Fri Jul 12, 2019 9:59 am
Forum: Processors
Topic: Samsung's 5nm/2nm EUV tech, latest update
Replies: 1
Views: 108

Re: Samsung's 5nm/2nm EUV tech, latest update

I also wonder how durable these things will be. Smaller features means more susceptibility to electrical stresses that would not harm larger structures.
by just brew it!
Thu Jul 11, 2019 4:24 pm
Forum: Processors
Topic: Official: Ryzen 3700X and 3900X review comments
Replies: 49
Views: 1386

Re: Official: Ryzen 3700X and 3900X review comments

synthtel2 wrote:
50 GB/s on a memory copy bandwidth test conventionally means 25 read and 25 write, not 50 and 50. Think max achievable bandwidth, not actual copy rate; copy is just the access pattern.

Ahh, taken in that light, the numbers make more sense.
by just brew it!
Thu Jul 11, 2019 1:58 pm
Forum: The Back Porch
Topic: Something's different...
Replies: 1043
Views: 25088

Re: Something's different...

Captain Ned wrote:
DancinJack wrote:
Gyromancer (Damage Jr) does peripheral reviews form time to time. Mice, keyboards, etc. It's good stuff, go check them out.

He's also a "trained technician" (I hope that picture is somewhere in the bowels of the CMS).

https://techreport.com/blog/17915/remem ... -incident/
by just brew it!
Thu Jul 11, 2019 10:50 am
Forum: Processors
Topic: Official: Ryzen 3700X and 3900X review comments
Replies: 49
Views: 1386

Re: Official: Ryzen 3700X and 3900X review comments

There's definitely something weird about that particular test with many CPUs - it's not uncommon for copy bandwidth to report higher than either read OR write. As a WAG, they're probably using a REP MOVD instruction for the copy test (which means the test effectively executes entirely in microcode ...
by just brew it!
Thu Jul 11, 2019 10:14 am
Forum: The Back Porch
Topic: Something's different...
Replies: 1043
Views: 25088

Re: Something's different...

DrFish - have you spoken or communicated with the new owners in some capacity? And if you are able to tell us, what was the internal announcement of the hand off like? From this thread, it sounds like there was no internal announcement. They knew it was coming, but the timing was a complete surprise.
by just brew it!
Thu Jul 11, 2019 10:12 am
Forum: Processors
Topic: Official: Ryzen 3700X and 3900X review comments
Replies: 49
Views: 1386

Re: Official: Ryzen 3700X and 3900X review comments

I am not sure however how it would be possible to get a copy bandwith higher than the write bandwidth? Copy == (read then write) right? Yeah, that does seem a bit odd. Almost has to be some sort of optimization that kicks in when the memory controller detects a block copy is being done, or a quirk ...
by just brew it!
Thu Jul 11, 2019 10:01 am
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 4529
Views: 189014

Re: DYMT: Imi's Legacy

I also remember back in the Teletype days you needed to send several (IIRC 3 of them) NUL characters (ASCII 0) after a carriage-return/line-feed combination, otherwise the first couple of characters intended for the next line would get smeared across the page because the physical carriage was still...
by just brew it!
Thu Jul 11, 2019 8:32 am
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 4529
Views: 189014

Re: DYMT: Imi's Legacy

...and sending multiple back-to-back form-feed (ASCII 12) characters to a high speed line printer could cause it to shoot an arc of fanfold paper through the air. I also remember back in the Teletype days you needed to send several (IIRC 3 of them) NUL characters (ASCII 0) after a carriage-return/li...
by just brew it!
Thu Jul 11, 2019 8:06 am
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 4529
Views: 189014

Re: DYMT: Imi's Legacy

Every so often, you run across something in the Linux documentation which makes you chuckle. Today's find (from the bash shell documentation): bell-style (audible) Controls what happens when readline wants to ring the terminal bell. If set to none, readline never rings the bell. If set to visible, r...
by just brew it!
Thu Jul 11, 2019 7:46 am
Forum: The Back Porch
Topic: I got married
Replies: 30
Views: 679

Re: I got married

What a weird direction this thread has taken. It's a tech forum, and steelcity_ballin mentioned it in the OP. Benchmarking different marriage techniques is to be expected. :) The method chosen by the OP definitely wins on price/performance; for people who don't mind the plain OEM packaging, it look...
by just brew it!
Thu Jul 11, 2019 7:37 am
Forum: Graphics
Topic: 6 Pin to 8 Pin Power Converter
Replies: 4
Views: 181

Re: 6 Pin to 8 Pin Power Converter

For PCIe power connectors the limiting factor is actually the current carrying capacity of the contacts in the connectors, not the wiring. You should still be OK with the adapter, but I'd be a little leery of overclocking the GPU without replacing the PSU.
by just brew it!
Wed Jul 10, 2019 2:18 am
Forum: Cases and Power Supplies
Topic: PSU decision
Replies: 10
Views: 582

Re: PSU decision

Yeah, modern PSUs are generally pretty good at minimizing noise when they aren't being pushed hard. Glad you're happy with your purchase!
by just brew it!
Wed Jul 10, 2019 1:06 am
Forum: Processors
Topic: You know those Ice Lakes with HBM that Intel don't have?
Replies: 19
Views: 487

Re: You know those Ice Lakes with HBM that Intel don't have?

@chuckles - NDAs don't grant you unlimited access to insider info. They just allow you to see very specific info on a carefully limited "as needed" basis. I assume you already knew this, and are just trolling?
by just brew it!
Tue Jul 09, 2019 11:34 pm
Forum: The Back Porch
Topic: Something's different...
Replies: 1043
Views: 25088

Re: Something's different...

Looks like Sent/Saved PM history has been wiped. Any chance of getting those back?

Never mind... either a temporary glitch or a brain fart on my part.
by just brew it!
Tue Jul 09, 2019 10:37 pm
Forum: The Back Porch
Topic: Something's different...
Replies: 1043
Views: 25088

Re: Something's different...

Ooh, that's a new one! Permanently banned from this board by IP address! I'll assume that's a Wordpress screwup but I'll check my original IP in the morning, just in case I need to post details. I do find it amusing that Wordpress thinks IP bans are relevant in this decade though. That made me chuc...
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