blueroomelectronics
Well-Known Member
LOL there was a poster looking for a way to glue together a half dozen or so 65W mini-atx supplies for his Warcraft supercomputer to make it somehow more portable...
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I can't make this stuff up, search for "warcraft" in these forums, it's there.
My Commodore PET 2001 cost me $1695 CDn in 1976. I worked all summer for it. Now it sits in a corner of my basement.
the true way to connect two psu's into one computer
Cut the green and grey wires on both psu's.
Make sure to cut half way on main psu. Reconnect the wires on the main psu.
That way the wires on the main psu is in a v shape. Now connect the green and grey wires from the other psu to the main psu. Remember green to green and grey to grey.
Therefore plug cords into power outlet and press the power on your computer. Both psu then will start up running smooth and great.
the true way to connect two psu's into one computer
Cut the green and grey wires on both psu's.
Make sure to cut half way on main psu. Reconnect the wires on the main psu.
That way the wires on the main psu is in a v shape. Now connect the green and grey wires from the other psu to the main psu. Remember green to green and grey to grey.
Therefore plug cords into power outlet and press the power on your computer. Both psu then will start up running smooth and great.
As a means of reducing cost, I would definitely agree that this is not a good way to do it. In fact, when I build a new computer, the power supply is one of the most thought out component in the build.To invest a few thousand dollars in graphics cards and then cobble two power supplies together to power them seems foolish to me.
I also agree with you here. I was simply making a point and picked a number at random.Should there be a 5 volt RMS difference between grounds from outlet to outlet a problem exist. The same would be true for a 5 volt RMS difference between neutrals in an older wiring scheme sans the ground.
I see this argument quite often in computers. The problem here is, you assume there is a proper chassis ground connection. Considering the plethora of aftermarket computer products, things like painted mounting screws and silicon grommets, a sound electrical connection between component and computer chassis cannot be guaranteed. I own an Antec computer case that uses non-conductive silicon grommets (pre-installed from factory). The mounting screws never touch the computer case. For some drives there is electrical contact, but for others there is nothing. Then you must also consider the case itself. There are many plexiglass cases on the market and even a few wood cases. These obviously are electrical insulators. The point is, you cannot rely on the presence or absence of a chassis ground.However, if we assume such a condition did exist it would be cancelled within the case chassis.
Agreed. If you do the calculations, even the specs given for most power supplies indicates that they deliver nominal power that is less than rated maximum.If we assume (and this is a big assumption) the PSU was in fact a 1300 watt PSU capable of delivering a full 1300 watts across all it's rated outputs (keep cross loading in mind) it would not draw 1300 watts at the mains power connector. It would draw considerably more.
I suppose that depends on your situation. I know how to put in my own electrical lines, but am not in the best of health, so the job becomes much more difficult. There are also many who don't have the authority to do these upgrades. For example, apartment dwellers.To my way of thinking it becomes easier for me to run a new 20 amp AWG 12 service branch with ground than to screw around using different branch outlets. Just my thinking on that note.
This is probably the main reason why I haven't attempted installing a second PSU. What happens if the regulators should 'cross paths' is likely going to be nasty. If one regulator is content to run at 11v4 and the other is content to run at 12v6, you basically end up with a tug of war. One vreg compensates upward in an attempt to keep the voltage at 12v6 while the other compensates downward in an attempt to keep the voltage at 11v4. This could theoretically cause massive current flow through whichever component(s) connect the two vregs.Looking at a PSU by design specifications. The 12 volt rail for example should be 12 volts +/- 5% so anything between 11.4 and 12.6 volts is acceptable. So what happens to regulation if one PSU outputs 11.5 volts (in spec) and the other outputs 12.5 volts (in spec). How will each PSU handle regulation? Even if I use one PSU strictly for the PCIE Aux connectors on the GPU card. Does the GPU also draw 12 volt power from the PCIE motherboard connector powered by another PSU? Should at any point those two 12 volt lines share a bond what will happen?