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 PC Power Supply Discussion Troubleshooting and discussion of computer power supplies

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#11
12-17-2008
 Merman 200W User Join Date: Sep 2008 Posts: 22 Thanks: 0 Thanked 0 Times in 0 Posts

Quote:
 Originally Posted by Travis I don't quite understand the algorithm here.

I was confused too until I divided estimated amps by estimated duty cycle. 72/.6=120. Total amps 4*30=120amps.

60/.4=150amps which doesn't make sense.

Now 60/ (1-.03)=86 amps makes more sense but I don't know how the duty cycle is estimated.

Quote:
 1. Math for calculating the maximum theoretical current supported by the rectifiers Computer power supplies are based on “step-down buck topology”. On this topology the minimum rating for the rectifying diode can be calculated thru the formula I = Io x (1 – D), where Io is the output current and D is the duty cycle from the waveform used to control the switching transistors. Thus if we know the maximum current supported by the diode, we can find the maximum output current using Io = I / (1 – D). http://www.hardwaresecrets.com/blog/112
#12
12-17-2008
 Oklahoma Wolf Heh. Two threes... what was he thinking? Join Date: Oct 2006 Location: Moderator Posts: 5,315 Thanks: 11 Thanked 22 Times in 18 Posts

I'm a bit fuzzy on it too, which is why I pulled the info from the review until I can figure that out
#13
12-17-2008
 burebista Manic Miner Join Date: Oct 2006 Location: Romania Posts: 1,097 Thanks: 1 Thanked 0 Times in 0 Posts

Quote:
 Originally Posted by burebista And for Wednesday if it's not Corsair TX850 maybe some sparkles from no-names PSU's?
Yay, bullseye.
Thanks OW, nice review as usual.
#14
12-17-2008
 Merman 200W User Join Date: Sep 2008 Posts: 22 Thanks: 0 Thanked 0 Times in 0 Posts

Quote:
 Originally Posted by Oklahoma Wolf As for the duty cycle thing, I'm learning more stuff from Gabe Torres' work.
To give credit where it's due, Travis originally brought up the idea.

#15
12-17-2008
 Oklahoma Wolf Heh. Two threes... what was he thinking? Join Date: Oct 2006 Location: Moderator Posts: 5,315 Thanks: 11 Thanked 22 Times in 18 Posts

Right - I'd forgotten about that. I had nine hours to get this review done... barely remembered my own name by the end
#16
12-17-2008
 Merman 200W User Join Date: Sep 2008 Posts: 22 Thanks: 0 Thanked 0 Times in 0 Posts

Quote:
 Originally Posted by Oklahoma Wolf Right - I'd forgotten about that. I had nine hours to get this review done... barely remembered my own name by the end
Doesn't matter the review is still excellent and the reviews have gotten progressively better from the VX550W review that was the basis for my purchase. Thanks for all your effort.

http://www.jonnyguru.com/modules.php...=Story&reid=62
#17
12-17-2008
 Redbeard Corsair Rep - Cases and Cooling Join Date: Mar 2007 Posts: 491 Thanks: 1 Thanked 23 Times in 14 Posts

Quote:
 Originally Posted by HOOfan_1 Here is a question for Redbeard. I noticed on Corsair's site that the HX450 has a 7 year warranty, yet all the other Enthusiast series PSUs only have a 5 year warranty. Why is that? Also what are the prospects of a modular supply between 620W and 1000W?
Our long term strategy is to have a High-end modular line and a mid-range fixed cable line. Much like our HX series and TX/VX series.

The HX450 is the first product in the high-end modular line, being that it's Bronze certified 80 Plus, exceptionally quiet with good voltage regulation and ripple/noise suppression, and the 7 year warranty. It was designed from the beginning with the 7 year warranty in mind so we are comfortable making the promise.

We're looking at future products that will meet that. The HX520 and HX620 are getting a bit long in the tooth, they were launched August of 2006. So we're looking at revisiting those wattage and price areas, as well as addressing the quite obvious gap in our modular line between the HX620 and the HX1000.

Eventually, the goal's going to be to have every wattage and price point covered. For the last 2.5 years, if somebody wanted to have a modular 750 or 850W PSU, we've had nothing to sell them.

Which means they've all been buying our competition's products in that area. So we'd be foolish not to have something in that range eventually.

Since the modular line is our high-end, we didn't feel comfortable using the PSH platform for that. While our modifications were extensive to the TX850, and it's well within ATX specs across the board and meets our aggressive specs for our mid-range PSUs, it couldn't be brought to the specs we wanted for audible noise and ripple/noise and efficiency that we're demanding for our next-gen high-end products.

That being said, the high-end modular cable line will definitely be more expensive. The TX750 is one of the best values in the market right now, and I think the TX850 is going to be a big seller as well.
#18
12-17-2008
 HOOfan_1 Flux Capacitor User Join Date: Nov 2007 Location: Richmond VA Posts: 1,492 Thanks: 0 Thanked 0 Times in 0 Posts

HMM so I am wondering if that means the newer high-end modular units will be based on a new CWT platform like the DSR, or a new OEM like Enhance or Impervio will be picked up.
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#19
12-17-2008
 Oklahoma Wolf Heh. Two threes... what was he thinking? Join Date: Oct 2006 Location: Moderator Posts: 5,315 Thanks: 11 Thanked 22 Times in 18 Posts

The DSR units would be absolutely fantastic around 800W if the Ikonik units are any indication
#20
12-17-2008
 EaGle1337 :/ Join Date: Nov 2008 Posts: 167 Thanks: 0 Thanked 0 Times in 0 Posts

DSR does look great, what about seasonic's new line of psus? the m12 i believe.

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