InverseParallax
@InverseParallax@lemmy.world
- Comment on Prototype of RTX 5090 Appears With Four 16-Pin Power Connectors, Capable of Delivering 2,400W 3 weeks ago:
Arcing causes more fires, because over current caused all the fires until we tightened standards and dual-mode circuit breakers.
Now fires are caused by loose connections arcing, and damaged wires arcing to flammable material.
Breakers are specifically designed for a sustained current, but arcing is dangerous because it tends to cascade, light arcing damages contacts, leading to more arcing in a cycle.
- Comment on Prototype of RTX 5090 Appears With Four 16-Pin Power Connectors, Capable of Delivering 2,400W 4 weeks ago:
There is no current without voltage, what you’re saying makes no sense.
Current is voltage over resistance, you get as much current as you have voltage, unless there’s an artificial effect limiting voltage, like a voltage regulator or zener diode or just fet.
When you say ‘it’s the current’, that electric fense has x volts before you touch it, and the fact that it doesn’t kill you means either the voltage is too low to produce a decent current in your body, or, there’s a voltage regulator/limiter that means when you touch it the voltage drops to some lower level, which I could calculate using the nominal resistance of the human body and the voltage of the fence.
In a way, the output impedance of whatever is driving the fence determines how much the voltage drops under load.
- Comment on Prototype of RTX 5090 Appears With Four 16-Pin Power Connectors, Capable of Delivering 2,400W 4 weeks ago:
No it’s not, I’m an ee.
P = I^2R, so power doubles with the current, while it’s linear to voltage.
This means current causes more heat dissipation in the wire, which has risks, potentially fire if you really go too far, this is why breakers trip.
But what really causes fires (again, outside of crazy overcurrent) is Arcing, from basically either bad connections or bad insulation, OR, from an inductive load that gets disconnected, so the current tries to stay constant in the coils, which leads to massive voltage spikes.
- Comment on Prototype of RTX 5090 Appears With Four 16-Pin Power Connectors, Capable of Delivering 2,400W 4 weeks ago:
Yeah, in Sweden I charge our plug in hybrid off 240, it’s pretty quick and you can use any outlet.
The giant round connectors are weird BTW, with all the holes, trying to sort that out for faster charging.
I don’t think we should run 100+ volts everywhere, we need to standardize on lvdc in most places (basically usb-c or so) with 100v only in kitchens and places you need it, because it’s more dangerous and can cause fires more easily.
- Comment on Prototype of RTX 5090 Appears With Four 16-Pin Power Connectors, Capable of Delivering 2,400W 4 weeks ago:
Amps are voltage over resistance (I = V/R), volts absolutely matter, the human body has a decent resistance and the higher voltage helps burn through that.
- Comment on Prototype of RTX 5090 Appears With Four 16-Pin Power Connectors, Capable of Delivering 2,400W 4 weeks ago:
Actually, in the US the outlets are often wired with 1 leg, while giving 2 legs gets you back to 240v.
110 is probably better in terms of general safety (which is good because our houses are death traps), but it means when you do need power you need a special circuit.
We should have both more common, but the plugs are terrible (basically they turn the left prong 90 deg).
- Comment on I probably interact with people who are at the pinnacle of their chosen skill but I'd never know because that skill isn't something that generates fame. 4 weeks ago:
Who?
- Comment on Self hosting email, FLOSS, Python ... 4 weeks ago:
Ran the stack manually for decades, but spam makes it harder.
Run mailinabox now, it takes care of everything pretty well.
- Comment on On trees... 4 weeks ago:
Oil was effectively plankton and other sea stuff.
Coal was forests.
- Comment on This blog is hosted on a Nintendo Wii 4 weeks ago:
Nice.
- Comment on This blog is hosted on a Nintendo Wii 4 weeks ago:
NetBSD.
Though for all we know it could be running on a potato.
- Comment on Realtek's $10 tiny 10GbE network adapter is coming to motherboards later this year 4 weeks ago:
I have a few 4x2.5gbe and 2x10gbe, and I think one is 8x2.5 + 1x10gbe.
Theyll get better, networking is actually easy to sku once you get going, they’ve just enjoyed the premiums till now.
And again, wifi was considered the main connector, which is why we got 2.5gbe in the first place, it fit 802.11ac and most of ax.
- Comment on Realtek's $10 tiny 10GbE network adapter is coming to motherboards later this year 4 weeks ago:
Realtek Freebsd drivers are ‘ok’ now, but that was a long fight.
Outside of wifi (I mean Jesus christ) most of freebsd networking got fixed a decade ago, but you still need to stick with common-ish gear.
Freebsd on kvm though, that’s a game breaker, especially with sriov mellanox.
- Comment on Realtek's $10 tiny 10GbE network adapter is coming to motherboards later this year 4 weeks ago:
And fucked it up by releasing the 8169 with a stepping change that added power management.
The kernel driver didn’t know this, so links would silently not come up, and you wouldn’t know why till you googled and learned you had to rebuild your kernel for your new motherboard.
- Comment on Realtek's $10 tiny 10GbE network adapter is coming to motherboards later this year 4 weeks ago:
That’ll be a while, there isn’t much push yet (1gbe is still pretty fast) and you can do 2.5 if you want to push, they’re basically starting to replace 1gbe with 2.5gbe as a drop in.
WiFi kind of screwed everything because it’s 90-95% of all user clients, so if wifi can’t handle the bandwidth, the bandwidth is considered ‘commercial’ and they charge you through the nose.
- Comment on Realtek's $10 tiny 10GbE network adapter is coming to motherboards later this year 4 weeks ago:
Excellent!
Now if we can only teach realtek how pci device id’s work, so they don’t use revision id’s to control power management, and links silently don’t come up if your kernel driver doesn’t support it properly.
I know this was a decade ago, but yeah, I’m still pretty damn pissed.
- Comment on 1955 was as old in 1990 as 1990 is in 2025. 4 weeks ago:
YOU HAD PEACE!!!
Peace of mind.
Peace that everyone wasn’t trying to force you to believe their opinions or be judged as evil.
I love the internet, but it desperately eroded the barrier that stood between our internal self-image and literally everyone else.
- Comment on 1955 was as old in 1990 as 1990 is in 2025. 4 weeks ago:
Yugoslavia is actually a good example.
We bombed the peace into Serbia.
- Comment on 1955 was as old in 1990 as 1990 is in 2025. 4 weeks ago:
1995 was amazing, really the whole 90s.
Amazing music, peace, and nobody was afraid to tell all the douchebags of the world to go f themselves.
- Comment on Former Dragon Age writer says Clair Obscur: Expedition 33 and Baldur's Gate 3 prove 'what's possible when a game is given time to cook' 4 weeks ago:
They’ve been trying to “Central Engineering” things.
I worked as a massive chip company, they thought they could fix things by moving a lot of engineering out of the groups and into a single place where different groups and products could borrow and plug and play tech from.
Which was a great idea, except the groups didn’t really understand what they wanted, and central engineering just wanted to make what they thought people wanted, which often fit nobody but looked really cool.
Bioware looks like they’ve been trying to pull all the game engine stuff central, which would be fine but the frostbite engine didn’t work for half of what they wanted, and more importantly the “divisions” ended up just being pushed to make “something” to show off their best new tech, even if there was 0 story or creativity behind it (I’m looking at you Anthem).
- Comment on The most powerful laser in the US recently produced 2 quadrillion watts of power 4 weeks ago:
It has a lot of value.
Firstly, we use lasers to measure chemical reactions, this one could increase resolution and potentially be used to trigger or shape the reaction.
Secondly, it could be a path towards laser-induced fusion which is kind of important.
Finally, modrrn chips are fabricated using something called an extreme-UV process, that uses sputtered tin hit with a multiple precision laser pulses. This could be used to refine that process further.
- Comment on The most powerful laser in the US recently produced 2 quadrillion watts of power 4 weeks ago:
That’s not strictly true.
Chemical lasers absolutely generate their own power, you’re thinking of electro-optically excited lasers.
- Comment on The Norwegian Government want to implement the Digital Markets Act in Norwegian law. 4 weeks ago:
I can get something out of it from Swedish, so obviously nobody should have an excuse.
- Comment on I have never met a woman named after her own mother 5 weeks ago:
Do middle names count?
Becauae I think all Swedish women have the middle name Anna.
- Comment on I have never met a woman named after her own mother 5 weeks ago:
Maria?
- Comment on We gonna fight 5 weeks ago:
- Comment on Anthropic apologizes after one of its expert witnesses cited a fake article hallucinated by Claude in the company's legal battle with music publishers 5 weeks ago:
- Comment on Mario Kart 64 got finally decompiled! 5 weeks ago:
It does texture mapping but that’s all. I think it does very limited, basically gouraud shading.
You have to clip your triangles, basically clip everything.
- Comment on Mario Kart 64 got finally decompiled! 5 weeks ago:
Ps1 is great because it’s a mips core, a funky 3d engine and the main weirdness is the spu.
The n64 is all weird (albeit with a similar but 64bit mips core).
- Comment on [deleted] 1 month ago:
We are all within Baudrillard’s Blender: en.wikipedia.org/wiki/Hyperreality
