141–150 of 526 posts
Why can’t they just use a cable+socket similar to PSU - wall socket? It’s not even multiple-kilowatts range.
That connector (C13) is rated for 15 amps. That's 180W at 12V.
This needs a name along the lines of The Red Ring of Death. What will we call it?
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It changes a lot. You are switching at different frequencies and although the currents are smaller, there is an increased cost if you want to do it efficiently and not have too many losses. But anyway for consumer products this is unlikely to happen because it would force users to get new power supplies which would reduce their sales quite drastically at least for the first one they make like that. The solution would…
> a low volume 48V card I wouldn't be shocked if someone told me that Nvidia already sells more 48V parts than consumer 12V parts.
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This is because they are trying to parallel like 50amps (it's 12 volt IIRC) over a few conductors to get to 600watts. If it becomes unbalanced due to any number of reasons, none of those individual cables can come close to handling it - they will all generate enough heat to melt lots of things. Conservatively, they'd have to be 8awg each to be able to handle the full load without melting if they ended up taking the f…
If only we had connectors which could actually handle such currents. Maybe something along the lines of an XT90, but no Nvidia somehow wants to save a bit of space or weight on their huge brick of a card. I don't get it.
12VHPWR is 8.4x20.8mm so it's got 7.7x the cross-sectional area but transmits only 2.5x the power. And 12VHPWR also has the substantial advantage that GPUs have fans and airflow aplenty.
So I can see why someone looking at the product might have thought the connector could reasonably be shrunk.
Of course, the trick USB-C uses is to deliver 5A at 48v, instead of 50A at 12v
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Define the exact "they" you're talking about and you'll start to see the problem.
I'm suspecting it's really less than half a dozen people at NVIDIA, like guys in purchasing division or PCB designers not wanting to make a drastic parts/footprint change. M8 SMD lug terminal in a gamer accessory is crazy, but not rocket science.
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Which new cars cost less than 2000$-1000$?
They didn't say new cars.
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Summary of the Buildzoid video courtesy of redditors in r/hardware: > TL;DW: The 3090 had 3 shunt resistors set up in a way which distributed the power load evenly among the 6 power-bearing conductors. That's why there were no reports of melted 3090s. The 4090/5090 modified the engineering for whatever reason, perhaps to save on manufacturing costs, and the shunt resistors no longer distribute the power load. Therefo…
Honestly with 50A of current we should be using connectors that screw into place firmly and have a single wipe or a single solid conductor pin style. Multi-pin connectors will always inherently have issues with imbalance of power delivery. With extremely slim engineering margins this is basically asking for disaster. I stand by what I've said elsewhere: If I was an insurance company I'd issue a notice that fires caus…
Step the GPU voltage up to 48V. (anyway you make a new connector that's not compatible with existing PSUs. Why not actually fix a problem at the same time, once and for all! [48V should be enough for anybody, right?])
Meh. Might as well ask for its own AC cable and be done with it.
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Until the US changes their AC power connectors, we just don’t have a use case for it frankly. When the entire system is going to always top out at 1200W or so (so you have an extra few hundred watts for monitors and such), we’re pretty limited to maximum amperage.
The USA has 240 volt plugs. They are only used for high power appliances such as AC or ovens. If you want, you could add a plug for your high powered space heater AKA gaming PC.
(Note, my building is actually 3 phase 208 volt not 240volt so I don't have 240 volt plugs but 208volt plugs)
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I doubt engineering a new connector (I think it's new? Unlike the Mini-Fit Jr which has been around for like 40-50 years) and standing up a supply chain for it could offset the potentially slightly lower BOM cost of using one specialty connector instead of three MiniFit Jr 8-pins. However, three of those would not have been enough for the 4090, nevermind the 5090.
> three of those would not have been enough for the 4090, nevermind the 5090. Oh you are right these PCIe power connectors can only draw 150W, so you would need 4 of those for 4090/5090. I guess that makes sense then to create a new standard for it actually, hopefully they can make a newer revision of that connector that makes it safer. In theory with the new standard you can have a single cable from the PSU to the G…