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 The newbie guide to power supply units, Questions and comments are welcomed

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jonnyGURU
post Nov 9 2014, 08:56 AM

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From: California
QUOTE(iyz96 @ Nov 7 2014, 06:25 AM)

He is so fussy that he is confused about the efficiency of both power supply..
You know that a power supply is at its best at >50% load..
So he is afraid that if he buy the HX850i now, he will waste on his electrical bill before getting a second GTX 970..
And if its the HX750i, he is afraid of not enough power in the future..
Like TristanX said.. the 750W would be enough.

And PSUs aren't only efficient at 50%+ load anymore. Now that 99% of the (quality) PSUs out there use a resonant LLC topology, the efficiency is fairly flat line across all loads.
jonnyGURU
post Dec 14 2014, 03:26 AM

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From: California
QUOTE(regiuseven @ Dec 13 2014, 04:33 AM)
Do laptop power adapters fit in here ?

A question: If a laptop shuts down in a sudden, is it due to the adapter or the components in the laptop ?

Hint: LED on adapter shuts off as well (most of the time)
Hint 2: LED on adapter stays lit (very rarely)

Went to shops and they don't know a thing about this (young technicians).

Plug off the power, plug it back in, adapter is on (LED is lit), and laptop on as usual (no software probs whatsoever).
Stays on for depends, on a lucky day >48hrs, right now on for about 15 mins max only before shutting down again.
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Does the battery in the laptop hold a charge otherwise? In other words: If the adapter isn't plugged in at all, does the laptop run normally?

Thing is, laptops work differently because you have a battery that sort of works like a large cap. If that battery isn't working, then ANY discrepancies in power from the adapter is going to affect the stability of the laptop.
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