Tír Na HiFi

goon-heaven wrote:

nige2000 wrote:i notice on other ordinary usb3 cards that the external molex is used as a booster its not separate for usb supply
ill also state my hatred for riser ribbons, more like an antenna, always lose some sq through them
direct into pci slot seems to be optimal for me

Agree... but any ideas how best to separately supply clean 5V to a "molex-less" pci card?

sima66 wrote:

mjock3 wrote:Adam,

Wondering if you could give me a link to where you were reading about the copper in your PC?

Also are you using copper at your data connections and power? I am not sure but it looks that way. Does the thickness of the copper have any affect?

Thanks,
Mark

Sorry Mark, but I don't have such a link. The inside dividing and separating it's a regular procedure, special with a better components. I believe that cooper is the best in that case. I never compared how much exactly the thickness affects, but I'm assuming that the ticker - the better, less crap goes true.

Yes you are right about the copper on my sata SSD connection to MoBo and on the power connector to Mobo. That idea I got from Marcin. It makes difference. I used, I believe 3/4'' copper pipe (whatever size fits your connector), soldered wire to ground it and that was it. I put shrink tube on the end, so it does not make any short with MoBo.

nige2000 wrote:That wasn't my understanding of it
I think the internal molex or the external 2.1 jack provides the only 5v to the usb port
and if the dac is self powered no extra 5v is required
any less would be silly

nige2000 wrote:...
ill also state my hatred for riser ribbons, more like an antenna, always lose some sq through them
direct into pci slot seems to be optimal for me

Aleg wrote: John
Nigel is correct.
The additional power (Molex or 2.1 barrel) is just for feeding the 5V in the USB not for powering the card itself.

If you want to use external power to power the card instead of the pci-bus then you would need to buy a riser card with external power. The external power of the riser will feed the pci-card but not the 5Von the USB.

Cheers

Aleg

jkeny wrote:

Aleg wrote: John
Nigel is correct.
The additional power (Molex or 2.1 barrel) is just for feeding the 5V in the USB not for powering the card itself.

If you want to use external power to power the card instead of the pci-bus then you would need to buy a riser card with external power. The external power of the riser will feed the pci-card but not the 5Von the USB.

Cheers

Aleg

Yes, that's what I'm saying the weakness with the design - no option for powering the card itself externally (except DIY or riser card route). From all our experiments here, it would seem that PC PS is best avoided for sensitive circuits. Then again, Marcin & Josef may have tested this & it may not make any difference?

nige2000 wrote: do you think that pci eternal power would make much difference?

i see here http://en.wikipedia.org/wiki/PCI_Express
theres 12v and 3.3v pins on the pci-e x1
no 5v so that has to come from elsewhere

dont know if its a worthy experiment to inject clean power into a usb card
i would have thought it to be a small benefit

is there switching regs on the jcat?

nige2000 wrote: ...
is there switching regs on the jcat?

Linear regulators on the card are extremely good. I thought I would be able to switch off the filtering as I'm using Bakoon BPS-02s battery PSU with the card, but it turns out even the bakoon benefits from additional filtering on the card.

nige2000 wrote: do you think that pci eternal power would make much difference?