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Search: Posts Made By: cypherpunks
Forum: PC Power Supply Discussion 03-03-2014
Replies: 6
Views: 494
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: 509
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: 1,250
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: 2,538
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: 2,538
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: 1,069
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: 860
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: 1,109
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: 1,109
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: 772
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: 772
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: 2,602
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: 5
Views: 1,630
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 Hardware 09-20-2013
Replies: 8
Views: 1,879
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 09-03-2013
Replies: 59
Views: 11,129
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: 3,750
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: 445,209
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: 338
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 Hardware 07-29-2013
Replies: 2
Views: 1,938
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...
Forum: General Hardware 07-29-2013
Replies: 2
Views: 1,761
Posted By cypherpunks
No. That system should require about 400W...

No. That system should require about 400W running Furmark overclocked to 1400 MHz. Source; note this measured 480W at the wall, which is 384W output at 80% efficiency...
Forum: Site Suggestions & Forum Issues 05-16-2013
Replies: 2
Views: 1,188
Posted By cypherpunks
NDFAQs claims charset=ISO-8859-1, but is UTF-8

For example, the quote marks around efficiency are encoded as e2 80 9c and e2 80 9d, which are valid UTF-8 for U+201C (http://unicode.org/cldr/utility/character.jsp?a=201C) and U+201D...
Forum: PC Power Supply Discussion 04-10-2013
Replies: 46
Views: 5,734
Posted By cypherpunks
There is zero chance that they made electrically...

There is zero chance that they made electrically incompatible connectors physically compatible. If it fits without forcing it, it's compatible.

Also, the connector is clearly labelled...
Forum: PC Power Supply Discussion 03-30-2013
Replies: 38
Views: 3,252
Posted By cypherpunks
Thank you for bringing things back on topic. I...

Thank you for bringing things back on topic. I got trolled by westom's discussion of direct strikes, which is, as you point out, irrelevant to the original question.

Sorry about that.
Forum: PC Power Supply Discussion 03-30-2013
Replies: 38
Views: 3,252
Posted By cypherpunks
Because, although I had misplaced my sources, I...

Because, although I had misplaced my sources, I remembered that direct strikes (which is what we were talking about woth 50 kA currents) have longer tails.

To be precise, a direct strike is...
Forum: PC Power Supply Discussion 03-30-2013
Replies: 38
Views: 3,252
Posted By cypherpunks
Because you jumped into direct hit territory, and...

Because you jumped into direct hit territory, and there you have to worry about (typically) 3 or 4 re-strikes. I like to be give myself lots of margin there.
BTW, an 18 AWG wire is up to 61,000...
Showing results 1 to 25 of 436

 
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