generic name wrote:
On 2013-10-20, charlie wrote:
On 10/20/2013 6:27 PM, Keith Nuttle wrote:
"Since Windows must be reinstalled frequently"
News to me!
I have seldom had to reinstall.
Now there was an HP Vista Laptop that gave me fits due to the HP
"bloatware". I ended up installing a generic Vista Ultimate "upgrade"
just to get rid of the HP *&^%. That was only because, the Vista
ultimate copy was a promo freebe.



"Frequently" is what a person claims; no number specified; for one
person once is too much; another twice is too frequent.

I installed win8 about 4 weeks ago, "cleanly"; win7 crashed because
of a new video driver. How to fix if the computer won't boot & just
shows a blank screen? Cannot get to "safe mode" as never got that
far.

"Never" reinstall is just lying. I might have to reinstall win8;
"update" to 8.1 if the ****ty ms usb3 driver don't work again
like it doesn't show up with the usb3 connection to the motherboard's
usb3 port. Strange that it powered up then win8.1 lost the 2 TB drive.

Was working when connected to the pcie adapter; BOTH usb3 chipsets
are from renasas. Had encounter problem with win8 when it became
available; just had to try with win8.1.........

The pcie has a connection to a power cord; don't know about the
motherboard. I connected the pcie board to a power line as the docs
say windows "sometimes" looses the usb connections if usb3 pcie board
is not connected.

Had reinstalled win7 a few times including when win8 messed up the
dual/tripple boot. Same with winxp. Lots depend on how you really
use a computer.

The PCI Express slot has +3.3V and +12V as power sources.
A designer could take the +12V signal, use a linear regulator,
and make a +5V supply for the USB3 bus power. A linear would
be thermally limited, and to be practical, a switching
regulator placed on the card, could do what is necessary
from the +12V source (50W to 60W or so, max). I seriously
doubt anyone would do this, but, it's an option. That
means, if you want USB3 bus power, you'd kinda want that
internal power connector to be used.

If a power connection is available on one end of the
PCI Express card, the idea might be to draw power for the
+5V from there. A SATA wafer connector, I think that is
rated at 3A, whereas if you had four USB3 ports, that
would be 3.6A max load (more, without overcurrent protection
of some sort). A Molex 1x4 power connector, can carry
more current than that and if I was purchasing a card,
would be my preferred solution. Perhaps 6 to 8 amps or so
on +5V for the Molex power connector. At least, until
the 5V @ 20A on the power supply becomes an issue, if you
were to run enough USB3 cards :-)

USB3 chips come in duals and quads, and at 900mA a port,
a quad would want a 3.6A power source for the USB3 bus.
And then I'd want that Molex, rather than the flat SATA
15 pin power connector, which is a bit wimpy.

"Does USB 3 offer more power than USB 2 ("High-Speed USB")?

Yes, USB 3 devices can use up to 900mA of power (compared
to 500mA used by USB 2 devices). You'll need to use a USB 3
cable to use the 900mA of power available. USB 2 cables
don't support 900mA."

*******

The NEC/Renesas chip was the first USB3 chip to ship.
Just like in USB2 days, the NEC chip was the first shipped,
and the Microsoft driver was modeled and tested against
the NEC one. If any chip is to work "out of the box",
that's the brand I expect would work.

Paul