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 Choosing The Right PSU, Discussions about power supply units.

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vey99
post Feb 24 2007, 09:09 AM

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QUOTE(fo33il @ Feb 24 2007, 12:04 AM)
i wanna ask...wht is the diff between modular n non-modular psu?...
i wanna buy a psu for my rig...still figure between liberty 500w or silverstone st560f...
tongue.gif
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Well there's a RM90 price gap between the two you know.. but I'd probably go for modular for easier cable management (unless you DIY urself) and if I don't have too many power hungry components.
vey99
post Feb 24 2007, 01:08 PM

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QUOTE(fo33il @ Feb 24 2007, 12:07 PM)
yeah..i kno.. smile.gif
rite now,only st56f and liberty 500w in my list.. biggrin.gif so,u say that modular is just for easier cable management rite?is there any other option that i can take?
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I say that cos my ST56F has pretty long cables and my casing is not full tower, so its hard(er) to cable-manage. Gets pretty crowded. But its real value for money at Rm349...
vey99
post Feb 25 2007, 08:09 PM

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QUOTE(Clavicus @ Feb 25 2007, 04:32 PM)
I'm using an Enermax FMA II 460w and im planning to upgrade to 8800GTS. I just found out that eVGA's website stated that 8800 needs 26A 12V rails. 12V rails refer to this right?

user posted image

I would like to know that my PSU is enough for these specs.

AMD 64 X2 3600+
Seagate 250GB
Asus M2N-E
8800GTS
3 LED 120mm fans
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QUOTE(mashimarow @ Feb 25 2007, 06:46 PM)
Correct, you have 44A, enough to run 8800GTS
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Actually he has 32A (384W) calculate from combined 12V rails, not the sum of both...
vey99
post Feb 26 2007, 12:34 PM

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QUOTE(vassalle @ Feb 26 2007, 12:17 PM)
So is that enough to run the 8800GTS?

BTW, i just recently got a 8800GTS 320mb version and plugged it in my current setup (e6300,blablabala and Acbel 450w). So far (only 24 hours) its still ok. But reading about all the PC meletup stories got me abit worried. Is the Acbel 450w enough to run my 8800GTS + c2d (oc abit to but undervolt kaokao to 1.19v vs 1.325v default)
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Check voltages first. I feel the psu watt is a bit low to run the rig. For me I would have >500W if I wanna run higher end equipment.

http://extreme.outervision.com/psucalculator.jsp

IIANM, rough guideline to calc how much watts you need. Take note power supply efficiency is not 100% all the time. So if 400W PSu with 70% efficiency then I assume I have 400X0.7 = 280W max to play with...
vey99
post Feb 26 2007, 01:08 PM

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QUOTE(vassalle @ Feb 26 2007, 12:41 PM)
Thanks for the link. Played with it before but forgot to bookmark it doh.gif
anyway, it says that the power requirement is 418w.

Here's a snapshot on the details for my acbel PSU.[attachmentid=197530]

Aiyoo.. pengsan la if have to get a new PSU. What are the signs that I should look for if the PSU is not strong enough?
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Generally reboots/hang are a sign of problem. Check your voltages with speedfan or sth and what voltage is showing at the +12V, ppl say if too low means problem, need other sifu's to comment herelah... but I would be more comfortable to buy a new and sell the current psu off (combined 12V is 300W = 25A only... did i read somewhere that 8800 needed quite a lot? 26A / 30A I may be wrong)


vey99
post Feb 26 2007, 04:28 PM

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QUOTE(vassalle @ Feb 26 2007, 04:11 PM)
Hmm.. but from the pic i posted above, max of 300w from 12v translates to 25A. Just slightly below the recommended 26A minimum. Arrgghh.. Need to shell out some money for a new PSU. Dangg..

If i need to change, i'm planning to get the Seasonic S12 Energy+ 550W PSU. It has some 41A 12v rails. Is it an overkill?
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Seasonic 550 is around RM550, why not save 200 and get the Silverstone ST56F? On mine it says 12V is 40A... Of course if you want better quality, go for Seasonic / Fortron ...
vey99
post Feb 26 2007, 05:27 PM

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QUOTE(vassalle @ Feb 26 2007, 04:51 PM)
On mine it says 12v is 40A <- what are u referring to actually? The st56f or the seasonic?

Dont dare to use fortron coz there are rumours that my Mobo DS3 does not like fortron PSUs HERE
Doesnt say what model though.. But unless there's someone to prove otherwise, I wouldnt want to gamble on that brand for now.

As for the ST56F, i've been reading up a lot about it. The thing I like about it is the 36A and the price. But after reading a couple reviews, especially from SPCR (ironically i found this review from the product page), it was kindof a letdown tbh. Summore, there are ppl complaining about the buzzing sound in the silverstone bulk area. My PC is by no means silent, but i really cannot stand the buzzing mosquitoish sound. It drives me crazy especially because my PC is beside my bed. But i'm not writing it of just yet.
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My ST56F is at 40A for 12 V (the website says 36A, but actual unit I have is 40A, dunno why also)

Fortron incompatibility with PDS3 - unsurelah but Fortron Epsilon 600 price is around 435 and also approved for SLI at www.slizone.com...

ST56F noise - My unit doesnt have any buzzing sound, currently my rig is silent (zalman 9500 hsf + zalman vf900cu) and no diff after putting the ST56F. So far no one in Kingmakers bulk got problem (i got from him)

vey99
post Feb 26 2007, 07:37 PM

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QUOTE(vassalle @ Feb 26 2007, 05:48 PM)
There was one guy complaining about the buzzing sound in the moderno/zamree bulk. Your ST56F states 40A? Where does it say? On the sticker on the PSU is it? Really curious now hmm.gif Can take photo or not?
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Yep on the PSU itself.

This a screenie of the box (too trouble to open my case)

user posted image

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