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Type: Posts; User: cypherpunks

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    Sticky: 230V supply in North America

    This is actually acceptable if you:

    Reidentify the neutral wire as live by wrapping it with black electrical tape at each end. (as you already mentioned) and
    Use a NEMA 6 receptacle, which is...
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    Sticky: I may have misunderstood. Your English is...

    I may have misunderstood. Your English is somewhat stilted, and it's hard to be sure I understand. You are right that PWR_OK only applies in the case of AC power loss. In the case of malfunction...
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    Sticky: No, in addition to its role during power-on, the...

    No, the PSU's eventually existing OVP and/or UVP protections would cause it to shut own into Latch mode. If no such protections, the PC's components would receive the out of spec voltages for as long...
  4. Protection against crappy power

    As others have noted, if your computer isn't crashing during the brownouts, it's unlikely to be hurting your PSU.

    A typical PSU will operate with input voltages down to 90V (to handle the 100V...
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    Yes, I said so: "if a UPS has a fan, then you can...

    Yes, I said so: "if a UPS has a fan, then you can connect external batteries to it. Small fanless models depend on the batteries running out before they overheat."

    OP's XL model in particular is...
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    Just add your own batteries

    It's particularly easy on those models with an external Anderson SB50 connector like you have, but you can do it with any.

    The basic rule of thumb is that if a UPS has a fan, then you can connect...
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    Er, from the manufacturer's efficiency curve? ...

    Where does this nonsense come from?![/quote]
    Er, from the manufacturer's efficiency curve?

    I agree that a good PSU can indeed be run at its rating continuously, given good cooling, but if you...
  8. Wait until the cx 430 goes to $20 AR at NewEgg

    That system is going to pull 300W from the wall, max, meaning 240W output, so a 400W PSU will have no trouble at all.

    I usually haunt the deals on NewEgg and get a CX 430 for the shelf when the...
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    Check with a multimeter, immediately.

    It's entirely possible that the BIOS voltage measuring has gone bad.

    A properly working power supply, with a +12V that's that far out of spec, should drop the PWR_GOOD signal and not let the...
  10. Ah, thank you. Yes, I forgot that resonant...

    Ah, thank you. Yes, I forgot that resonant topologies are harder to modulate the duty cycle of.

    But this of course begs the question: if it's running as a DC transformer, what is there to...
  11. Request for clarification...

    Er... what's a "primary buck stage"? I'm used to "primary" and "secondary" referring to different sides of the main transformer and isolation barrier.

    On the primary side is the boost PFC and...
  12. Bettet to add batteries

    If your UPS has a fan, meaning that it doesn't depend on running out of power before it heats up dangerously, then you can very easily add external deep-cycle batteries. I've done this with a lot of...
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    Correct voltage under load necessarily implies...

    Correct voltage under load necessarily implies correct current. That's why PSU reviewers use load testers.

    If you measure a car battery's voltage while starting, you'll see that it nose-dives to...
  14. I started writing responses to these (e.g. if the...

    I started writing responses to these (e.g. if the adapter doesn't get too hot within 30 minutes of full load, that's as hot as isn't going to get), but then I realized that I was getting sidetracked....
  15. Yes, you can run LGA2011 + dual GPU on a 550W PSU

    I like to point out how people usually overestimate their PSU requirements, and very few people need more than a 500W supply.

    There's been a huge problem where people buy twice the wattage PSU...
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    The problem is, a generic no-name 400W PSU may...

    The problem is, a generic no-name 400W PSU may only be able to produce 250W of output. At that level, there's a lot of junk around.

    Or it may just be an old 5V-heavy PSU with a limited 12V supply...
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    Have you got a kill-a-watt or similar so you can...

    Have you got a kill-a-watt or similar so you can actually measure the power consumption? I have a hard time believing a dual-processor motherboard that actually draws more than 400W under load; the...
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    Well, the simple way to test is to do the...

    Well, the simple way to test is to do the paperclip trick to the PSU. Turn it on with a piece of wire (paper clips are often used, but not necessary) stuffed into the back of the green wire and any...
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    Budget 200W per PU and you're fine.

    My simple rule of thumb is 200W for each CPU and 200W for each GPU. If your PSU is honestly rated, that's all you need, and includes plenty of headroom for a few hard drives, CD-ROM, case fans, etc....
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    People usually get away with it, but it's tricky.

    Well, it depends on how safe you want it to be. Certainly many people get away with using the 7V trick on a couple of low-power fans. But there are some nasty gotchas.

    The bit about no...
  21. Thread: Corsair RM

    by cypherpunks
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    You can say that again. The reason I adore...

    You can say that again. The reason I adore Corsair PSUs is because there isn't a lemon among them. If someone aske me for a recommendation, "Get Corsair" is a whole lot easier to say than...
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    You need a better voltmeter...

    Beautiful unit, but you're praising it based on the last measured digit of a reading. That's just not okay. With any reading, fluctuation in the last digit is meaningless; it can be caused by an...
  23. Sticky: Yes, no problem. The actual card draws only 170W...

    Yes, no problem. The actual card draws only 170W (14A) of power; the 30A number is a recommended total for the entire system. And the Thunder 500 can deliver 34A (408 W) at +12V.

    So you meet all...
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    Input filtering and EMC

    "Electromagnetic compatibility" is the general term for two related issues: the susceptibility of a device to external electromagnetic signals, and the amount of interference generated by the device....
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    Not particularly. Obviously, you'll need a large...

    Not particularly. Obviously, you'll need a large one. It should fit the board *comfortably*, since you want good cleaning over the whole surface, and you can't fold the board.

    They're generally...
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