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[TQ] New USB Specification Promises 100W Of Power.

post #1 of 85
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http://www.thinq.co.uk/2011/8/10/new...es-100w-power/
Quote:
The group behind the USB 3.0 specification has announced a tweak which could lead to impressive new devices, including large-format displays, printers, and even laptops that are powered entirely from a USB port.
Seeing as how we already have a USB Chainsaw with the old tech, I can't wait to see what weapons we can conjure with this!
Edited by frickfrock999 - 8/10/11 at 7:30am
post #2 of 85
This is going to cause some PSU issues. Modern PSUs are not designed for such heavy loads on the +5V rail, especially cheap group regulated ones.
post #3 of 85
looking forward to people frying the PSUs from overloading the USB ports. Yay.

anyway, I think that it is pretty cool but some of that stuff is dumb, like a usb powered laptop? Why would you want a USB powered laptop? You have to have a computer to run another one, that is pretty dumb when you can just put it into the wall.
post #4 of 85
I was just wondering about that....
post #5 of 85
Blast! I thought we would finally get away from +3.3v and +5V and to 12V exclusively.
post #6 of 85
The new spec has the capability of 100w, not like we're likely going to use all of it.
post #7 of 85
I mean, if you ran a 100W laptop off a Corsair CX430 that was also powering a computer, the PSU would just shut down. I mean it can only do 20A@+5V, which is 100W; an average computer pulls 30-50W on that rail, so 130-150W exceeds the PSU's design parameters. Not to mention if you're doing this at idle the +12V load will be very low, so you get a crossloading situation. The +5V voltage goes way low, and the +12V voltage goes way high. There's potential for component damage there, and system instability. Low +5V can cause a hard drive head crash.

Most PSUs in pre-built systems are even less capable than the CX430 in this regard.

They could redesign these PSUs to have more +5V capacity, but that seems a step backward as we've been phasing these voltages out slowly since 2001.
post #8 of 85
Quote:
Originally Posted by Phaedrus2129 View Post
I mean, if you ran a 100W laptop off a Corsair CX430 that was also powering a computer, the PSU would just shut down. I mean it can only do 20A@+5V, which is 100W; an average computer pulls 30-50W on that rail, so 130-150W exceeds the PSU's design parameters. Not to mention if you're doing this at idle the +12V load will be very low, so you get a crossloading situation. The +5V voltage goes way low, and the +12V voltage goes way high. There's potential for component damage there, and system instability. Low +5V can cause a hard drive head crash.

Most PSUs in pre-built systems are even less capable than the CX430 in this regard.

They could redesign these PSUs to have more +5V capacity, but that seems a step backward as we've been phasing these voltages out slowly since 2001.
USB 4.0, integrate 12v into the USB port, use 5v for low power things such as flash drives, 12v for high powered devices. I'm looking forward to USB devices such as printers and whatnot powered by only a USB cable .
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Tiny Fun
(8 items)
 
4P Folding Rig 1
(16 items)
 
4P Folding Rig 2
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CPUMotherboardGraphicsRAM
i7-4770K @ 4.0GHz MSI Z87I EVGA GTX 660 Ti Corsair Vengeance 16GB 
Hard DriveCoolingOSCase
Samsung 840 Pro 256GB Swiftech Apogee Drive II Windows 8 Enterprise x64 Cooler Master Elite 120 Advanced 
CPUCPUCPUCPU
AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core 
MotherboardGraphicsRAMHard Drive
SuperMicro H8QGi+-F Matrox G200eW 16x2 (32GB) Crucial Ballistix DDR3 1600MHz Crucial C300 64GB 
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MotherboardGraphicsRAMHard Drive
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post #9 of 85
Quote:
Originally Posted by LemonSlice View Post
USB 4.0, integrate 12v into the USB port, use 5v for low power things such as flash drives, 12v for high powered devices. I'm looking forward to USB devices such as printers and whatnot powered by only a USB cable .
Ohhh. Well that's different, then.
post #10 of 85
I'm looking forward yo USB's demise, at least in the performance oriented devices.
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