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Forum: PC Power Supply Discussion 11-11-2017
Replies: 15
Views: 122,504
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 12-21-2016
Replies: 41
Views: 18,511
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 12-20-2016
Replies: 41
Views: 18,511
Posted By cypherpunks
No, the PSU's eventually existing OVP and/or UVP...

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...
Forum: PC Power Supply Discussion 12-20-2016
Replies: 18
Views: 2,647
Posted By cypherpunks
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...
Forum: General PC Hardware 06-23-2015
Replies: 4
Views: 1,827
Posted By cypherpunks
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...
Forum: General PC Hardware 06-21-2015
Replies: 4
Views: 1,827
Posted By cypherpunks
Just add your own batteries

It's particularly easy on those models with an external Anderson SB50 connector (https://www.amazon.com/dp/product/B004KNFTI6) like you have, but you can do it with any.

The basic rule of thumb is...
Forum: PC Power Supply Discussion 03-03-2014
Replies: 6
Views: 1,620
Posted By cypherpunks
Where does this nonsense come from?![/quote] ...

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...
Forum: PC Power Supply Discussion 02-23-2014
Replies: 6
Views: 1,652
Posted By cypherpunks
Wait until the cx 430 goes to $20 AR at NewEgg

That system is going to pull 300W from the wall, max (http://www.tomshardware.com/reviews/nvidia-gtx-280,1953-25.html), meaning 240W output, so a 400W PSU will have no trouble at all.

I usually...
Forum: PC Power Supply Discussion 02-06-2014
Replies: 20
Views: 3,965
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 01-16-2014
Replies: 22
Views: 7,142
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 01-16-2014
Replies: 22
Views: 7,142
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 11-28-2013
Replies: 15
Views: 4,838
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 11-02-2013
Replies: 12
Views: 2,575
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 10-07-2013
Replies: 6
Views: 3,833
Posted By cypherpunks
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....
Forum: PC Power Supply Discussion 09-30-2013
Replies: 6
Views: 3,833
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 09-28-2013
Replies: 8
Views: 2,386
Posted By cypherpunks
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 (http://www.hardwaresecrets.com/article/534). At that level, there's a lot of junk around.

Or it may just be...
Forum: PC Power Supply Discussion 09-28-2013
Replies: 8
Views: 2,386
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 09-28-2013
Replies: 36
Views: 6,189
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 09-20-2013
Replies: 7
Views: 5,045
Posted By cypherpunks
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....
Forum: General PC Hardware 09-19-2013
Replies: 8
Views: 4,788
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 09-02-2013
Replies: 131
Views: 36,576
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 09-02-2013
Replies: 44
Views: 9,321
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 08-01-2013
Replies: 184
Views: 558,341
Posted By cypherpunks
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...
Forum: PC Power Supply Discussion 07-29-2013
Replies: 0
Views: 968
Posted By cypherpunks
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....
Forum: General PC Hardware 07-29-2013
Replies: 2
Views: 2,873
Posted By cypherpunks
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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