How to make it crystal clear, that you have no idea what you are talking about.
Space heater and hair dryers are meant to dissipate the heat at their coils. False comparison.
I guess they're hoping transient spikes will load the PCIe slot instead of the cable?
They're really not equivalent comparisons. Self-heating of the wires really isn't a limiting factor in a PC, even 18 gauge is more than fine with the full 600W over 6 conductor pairs. Voltage drop is more of a concern; it's not an issue if you have a couple hundred millivolt drop over a 2m for a 120V hair dryer cord but 200mV on your 12V rail is reasonably substantial.
| PCIe Voltage Deviation | No Requirement | No Requirement | -8% ~ +5% | -8% ~ +5% |
Not going to read through any of your quoted dribble, but since you want to be all armchair engineer. It IS about the RESISTANCE. You know that one single part of ohm's law you keep leaving out.When people are freaking out about safety, it is a reasonable comparison to point out. But I'm glad that you agree that cable heating is not a real issue. Another issue down.
Voltage drop is a separate issue. You could indeed have a drop of about 200mv, maybe even 300mv across the cabling at 600W. But this isn't a problem either. Drops under these kinds of loads are expected and will not cause problems.
You can see the difference between ATX power specs here:
Differences Between ATX 3.0 and ATX 3.1 Standards - Seasonic Knowledge Base
As PC hardware performance continues to improve, the power consumption of graphics cards and CPUs is rising, especially when high-end graphics cards are under hknowledge.seasonic.com
Here is the allowable PCIe voltage deviation (until ATX 3.0, there was no requirement).
PCIe Voltage Deviation No Requirement No Requirement -8% ~ +5% -8% ~ +5%
8% of 12v is .960 mv, or nearly 1 full Volt. So GPU are expected to keep running at 11V...
Shocker: Engineers actually thought about how load affects voltage drops, and everything is built taking this into account.
More fun for GN to sort out in the future.And then the warranty departments can blame your mobo! Hehe.
Not going to read through any of your quoted dribble, but since you want to be all armchair engineer. It IS about the RESISTANCE. You know that one single part of ohm's law you keep leaving out.
Resistance through the connector, most typically on the board side and not the PSU ( makes you wonder doesn't it?) is the spot that roasts from the excess R=V/I
Your heater example, the coils are the resistance that create the heat. Designed that way. Example post #476
I really doubt you know much about voltage drop also. Well beside what you can Google or Wiki up.
Very true. It's actually funny that the "cheap" engineers with definitely no real world experience decided to shroud the pins in plastic while making the decision to let them go toast with almost 600W of power for prolonged periods and no way to dissipate the heat, leading to the melting connectors.Resistance through the connector, most typically on the board side and not the PSU ( makes you wonder doesn't it?) is the spot that roasts from the excess R=V/I
I can tell you are just parroting stuff you read on the internet without a full grasp of the topic. Your posts keep bringing to mind the very old saying: "Don't try to teach your Grandma to suck eggs".
MrTeal OTOH actually seems to understand quite well, and made a valid point, which I believe I adequately addressed. I welcome his response if he disagrees.
You complained about cabling, claiming it couldn't handle the amperage, and that it would need to be 14 or 12 gauge. No one who really understood would claim that. This made it clear you were just grasping at straws.
So I gave you a simple example you should be able to understand, to highlight why the cabling was fine. Power cables don't care if the are powering a GPU, or a Heater (or a Load tester). Amperage is Amperage. The current carrying limit is based on power cable heating (and the insulation rating if you want more detail).
I've seen testing on the connector, where 900W (skipping the GPU and using a PSU load tester) was pumped through it for half an an hour and the hot spot stabilized at about 52C. Which is fine, especially considering that's a 50% overload for half an hour (which would never realistically happen), and then pumped 1200W through it for 10+ minutes, then it reached something like 82C which is a good point to stop before you start melting things, but that's double the the continuous load rating, way beyond never going to happen.
It's unfortunate that they never thought to design the sense pins as a safety mechanism from the start. If they did, I'm quite certain there never would have been any issue with these connectors. Instead we now have some people with unreasonable fear of the connector.
What are you even going on about? It's like you're throwing out random terms hoping something sticks. Stranded wire is used instead of solid because it's a lot more flexible. Skin effect has nothing to do with PC power wiring, and even if it did stranded wire still exhibits skin effect proportional to the diameter of the wire not the individual strands.Ok since I am parroting stuff from the internet, why don't you explain why stranded wire is used instead of solid, and what "skin effect" is?
You also have not addressed the very many instances, in why the connector at the card plug overheats (remember resistance), nit not at the 90 or 180 degree ends of the adapters, or the power supplies?
Do you think Cable Mod recalled and discontinued their connector attempts because they designed them bad or that it was because they could not sustain replacing/repairing the 4090s?
All cable is rated, from 22awg on up to 4awg and then some. Why some is acceptable to be solid core versus stranded core.
It is very clear there is a RESISTANCE issue with Nvidia's 12 pin high power connector.
Remember resistance creates heat.
Your posts bring the old saying of you can lead a horse to water, but can't make it drink.
Voltage is equal to current multiplied by resistance. What is not know is the resistance of that connector, to create a melting condition.
Good day sir, you tire me with your attitude and insults.
He brought up the space heaters and hair dryers. But I'm done with it. Proof will be in the next gen.What are you even going on about? It's like you're throwing out random terms hoping something sticks. Stranded wire is used instead of solid because it's a lot more flexible. Skin effect has nothing to do with PC power wiring, and even if it did stranded wire still exhibits skin effect proportional to the diameter of the wire not the individual strands.
What exactly is your argument here? I assume you're trying to say that 3x8 pin is better than 12VHPWR because the contact resistance is lower, but it's hard to tell. All the things you're bringing up regarding AWG, solid vs stranded and skin effect are just confusing the issue.
Wtf does it only have one connector on the 5090 FE, that's madness.
Wtf does it only have one connector on the 5090 FE, that's madness.
The future's so bright, everything is aglow!