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Originally posted by MadDogMe
coils?, ect. do they get HOT or do they get hot ?...
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Coils are made of great lengths of wire, huuhhhh.... COILED around a core. Just any wire, even pure copper, has resistance... Basically this makes a transformer an equivalent of a coil + a resistor in series. If the material used for the coil was a supraconductor it wouldnt heat (ask your neighbour particle accelerator). But the smallest supraconductor coil i've seen was helium cooled and tall as a house.
So as a resistor it gets hot, with the good ol' formula P=RI^2. Since all the PSU current passes through one coil (in our small ATX units) thats a lot of heat, so yes they can get *uncomfortably* hot.
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A quick question on my Enermax 350watt PSU, my 5&12v rails are slowly detiorating
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Life is a b*tch, aint it.. The same here. Even had to reduce the OC.. :/
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What would cause them 'both' to deteriorate?, I could understand one or the other from a poor ATX connection , but both?. I understand the 12&5v rails are somehow tied together. would the common earth having a poor conection cause this?, or is it the PSU giving up the ghost?, OR is it just a bad ATX block?(gold plated Ennermax jobbie).
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Well firstly Enermax arent known for 'voltage fidelity'. For their price they're even quite imprecise. They're very good at marketing products and make shiny golden plated grilles, but their electronics are just about average. The PSU i got is another 'average' product, and it's been several months since i've seen that.
I think it's because of consumer-level rated components, slowly 'burning in' as we OCers would call that. But 'burning in' for a power component is bad...
The original reason ? Heat, and lower quality components. Guess why you pay only $100 for a 400W PSU, and to have a real linear lab PSU (which wont die or degrade in 2 years) of the same power you have to shell out $800 to $1000...
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(mobo mod)
what do you think?
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Bypassing the ATX connector by soldering directly another connector to its back pins *could* work, provided that:
- you've got good soldering skills
- the other connector is good enough
- you use shorter, thicker wires
Don't forget shrink wrap and soldering flux.. make a decent work
Now bypassing mobo MOSFETs is a dangerous proposition. Make sure you know where you're going. What you are bypassing. And what you're powering, really. Make sure the components you'll power that way can endure the variations or power surges of your direct-to-consumer mod.
Ferrous cores (with coils around) are there to balance the effect of capacitors. Even common PSU wires going to your mobo have a small capacitance (along with connectors), and it may be a good thing (for CMOS components) to cancel it. Usually the power part of the mobo has an impedance adapter to nullifiy the impedance of PSU wires and connectors.
In the end you may lose hardware for a sum greater than that of a shiny new PSU... You've been warned.