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post #11 of 26
As others have said, don't join the two together, PSUs are not like batteries, it is dangerous. In fact you are not even supposed to mix batteries, though the consequences are less dramatic.

I would maybe just take one of the ones offered for shipping, or buy him one and unpack it first. Maybe even let it run for a few weeks to get a little dust in there. I won't tell if you don't.
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post #12 of 26
Quote:
Originally Posted by All3n View Post

As others have said, don't join the two together, PSUs are not like batteries, it is dangerous. In fact you are not even supposed to mix batteries, though the consequences are less dramatic.
I would maybe just take one of the ones offered for shipping, or buy him one and unpack it first. Maybe even let it run for a few weeks to get a little dust in there. I won't tell if you don't.

I don't think it's dangerous, maybe with non-branded generic stuff. But I doubt it, my TJ-11 offers adapters to connect two PSU's together, as well as two mounts, so it is possible, even without the risk of danger. Just has got to be done correctly, with high quality units.
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post #13 of 26
Thread Starter 
While a PSU isn't a battery, it is basically nothing but a transformer. With a good understanding of Ohms Law, atomic theory, math, electronics, I'm pretty sure I could run my computer with bits and pieces of a bunch of old cell phone chargers.

The dilemma was that I don't have the time between work and my own kids to help my nephew out with his little Frankenstein project, and his parents didn't actually think he could build it in the first place. I figure, I'll just buy him a whole new one, foster his love of electronics, and they'll get over it. The kid was clever enough to put together a working rig out of scraps ranging from two to ten years old, it runs fine with a less power-hungry graphics card. He could probably handle splicing PSUs with a good guide, but I don't want him doing anything by the advice of a youtube video with a warning that says "if there's no smoke, you did good".

Thanks for the kind offers, but if my sister's going to be mad at me anyway, I may as well get him a whole new machine to build. At least then the argument will be worth it.
post #14 of 26
I say since the kid went through the trouble of getting all your stuff organized, and has the know how to assemble a decent system and even brought the creativity for a dual PSU idea up....be a good uncle and get him a nice little rig. He will definitely appreciate it and treat it well. It would be a hell of a Christmas present as well, would last him at least a few years with the right parts. You sound like you can even get a few donations by the way the people in this thread are ready to help. thumb.gif

Let your sister get mad at you. I doubt it to be the first time that has happened ! biggrin.gif She will likely get over it.
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post #15 of 26
Quote:
Originally Posted by JohnyRadio View Post

The dilemma was that I don't have the time between work and my own kids to help my nephew out with his little Frankenstein project, and his parents didn't actually think he could build it in the first place. I figure, I'll just buy him a whole new one, foster his love of electronics, and they'll get over it. The kid was clever enough to put together a working rig out of scraps ranging from two to ten years old, it runs fine with a less power-hungry graphics card. He could probably handle splicing PSUs with a good guide, but I don't want him doing anything by the advice of a youtube video with a warning that says "if there's no smoke, you did good".
Thanks for the kind offers, but if my sister's going to be mad at me anyway, I may as well get him a whole new machine to build. At least then the argument will be worth it.
You're a cool uncle. wink.gif
post #16 of 26
Quote:
Originally Posted by XFZhong View Post

I don't think it's dangerous, maybe with non-branded generic stuff. But I doubt it, my TJ-11 offers adapters to connect two PSU's together, as well as two mounts, so it is possible, even without the risk of danger. Just has got to be done correctly, with high quality units.

Are you saying your tower came with a connector cable for joining any two random power supplies together?(Electrically parallel)
I would be very surprised if it did.

The point being if you joining two transformers together, the need to be identical.
PSUs in computers are not transformers, they are switch mode power supplies.

Any adapters I have seen are simply for triggering the power on multiple independent PSUs.

OT: Generally speaking, hooking non-identical transformers together is a bad idea and at the very least should be protected by some diodes. Same for switch mode power supplies, diodes in addition to load balancing resistors should be used at a minimum. Also conventional tansformers must absolutely be in phase.

If you want to use two power supplies, only join them by their trigger wires. Example one PSU powers the motherboard and drives, the other PSU powers the graphics card and fans.

Maybe that's what the OP intended, I am not sure, just wanted to clarify that for anyone reading this.
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post #17 of 26
Quote:
Originally Posted by JohnyRadio View Post

While a PSU isn't a battery, it is basically nothing but a transformer. With a good understanding of Ohms Law, atomic theory, math, electronics, I'm pretty sure I could run my computer with bits and pieces of a bunch of old cell phone chargers.
The dilemma was that I don't have the time between work and my own kids to help my nephew out with his little Frankenstein project, and his parents didn't actually think he could build it in the first place. I figure, I'll just buy him a whole new one, foster his love of electronics, and they'll get over it. The kid was clever enough to put together a working rig out of scraps ranging from two to ten years old, it runs fine with a less power-hungry graphics card. He could probably handle splicing PSUs with a good guide, but I don't want him doing anything by the advice of a youtube video with a warning that says "if there's no smoke, you did good".
Thanks for the kind offers, but if my sister's going to be mad at me anyway, I may as well get him a whole new machine to build. At least then the argument will be worth it.


Nope. Not even a little bit. A transformer is to an SMPS as a bicycle is to a truck. You might be able to cobble a dirtbike together from the parts of a dozen bikes, but you won't make a turbine-engine Peterbilt by combining parts from old Fords.
post #18 of 26
You're a cool uncle. If you have the cash to buy him a new rig power to you man! If not, buy him a new graphics card or a power supply. I'm sure he would be greatly appreciated either way.
Once the rig is complete he must post on the forums and tell the story about his rig! My parents helped me when I was 13 to build my first computer, and it's lead me to a successful career in the IT field and also many national competitions won in high school. +rep to you sir! thumb.gif
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post #19 of 26
Quote:
Originally Posted by SmokinWaffle View Post

Bad idea. I've killed GPU's using two PSU's, and it can be quite unstable/unreliable. Get a single, good PSU. thumb.gif

I'm a bit unsure about this since it's something done by many enthusiasts. I'm considering it for 4x 7970 Lightning BE's, as i'm unsure any single unit would be upto the task.
 
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post #20 of 26
buy a psu, hide it somewhere, and let him find it?
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