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Choosing The Right PSU, Discussions about power supply units.
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fo33il
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Feb 24 2007, 12:07 PM
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QUOTE(vey99 @ Feb 24 2007, 09:09 AM) 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. yeah..i kno.. rite now,only st56f and liberty 500w in my list..  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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vey99
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Feb 24 2007, 01:08 PM
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QUOTE(fo33il @ Feb 24 2007, 12:07 PM) yeah..i kno.. rite now,only st56f and liberty 500w in my list..  so,u say that modular is just for easier cable management rite?is there any other option that i can take? 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...
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Clavicus
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Feb 25 2007, 04:32 PM
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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?  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 This post has been edited by Clavicus: Feb 25 2007, 04:45 PM
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mashimarow
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Feb 25 2007, 06:46 PM
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Correct, you have 44A, enough to run 8800GTS
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vey99
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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?  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 QUOTE(mashimarow @ Feb 25 2007, 06:46 PM) Correct, you have 44A, enough to run 8800GTS Actually he has 32A (384W) calculate from combined 12V rails, not the sum of both...
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Clavicus
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Feb 25 2007, 09:39 PM
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Thanks alot guys.
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vassalle
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Feb 26 2007, 12:17 PM
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QUOTE(vey99 @ Feb 25 2007, 08:09 PM) Actually he has 32A (384W) calculate from combined 12V rails, not the sum of both... 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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vey99
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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) 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.jspIIANM, 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...
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vassalle
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Feb 26 2007, 12:41 PM
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Thanks for the link. Played with it before but forgot to bookmark it  anyway, it says that the power requirement is 418w. Here's a snapshot on the details for my acbel PSU.
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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Kataro
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Feb 26 2007, 12:43 PM
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QUOTE(mashimarow @ Feb 21 2007, 08:44 PM) Yours is a AGP/PCI-E board right? The board mainly is for AGP slot with PCI-E as extra for future use. It is also great for people to switch to 775 socket to try out duo core while retain his AGP card, RAM and PSU. Yours is a special case Addition note : AGP is dead since 6 series card, but they keep it alive by adding a bridge chip to decode PCI-E signal to AGP. I didn't see the architech built out of your Asrock, I believe it is using the same technology. Correct me if I am wrong  So does it mean my PCI-e will not run at 16X, but run at 4X or 8X...as I can see from CPUz, the graphic transfer rate is only 4x while the max it support is 16x...don't know why...
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vey99
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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  anyway, it says that the power requirement is 418w. Here's a snapshot on the details for my acbel PSU.
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? 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)
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Clavicus
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Feb 26 2007, 02:39 PM
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400w + 26A 12v rail.
EDIT: How much of +12V in considered low?
This post has been edited by Clavicus: Feb 26 2007, 02:40 PM
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mashimarow
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Feb 26 2007, 03:07 PM
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Acbel is a strong 12V PSU, your 450W should enough to run 8800GTS under minimal setup but not GTX. For safety, you can use a program to check the 12V rail, if it is running lower than 11.60, consider your PSU is overwork. Normally a strong PSU should maintain around 11.90
In term of modern usage, A 26A on 12V rail consider healthy. However depends on your usage, such as using 8800, 26A may not enough.
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SUSMatrix
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Feb 26 2007, 03:09 PM
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I'm having hang/reboot problem recently....i'm not sure if it's after my upgrade to AMD X2 or since i add in the Creative X-Fi card. Occasionally it'll auto-reboot on bootup, maybe hangs at startup or after startup. It's not too frequent, but enough to annoy and worries me.
My main rig in sig. I don't think this rig use too much power...my current PSU is quite a decent PSU, costing RM200 2 or 3 years ago. However it's only 20pin and i'm using a 24-pin mobo (meaning 4 pin has no power)....could this be the cause of problem??
I'm also looking into buying a new PSU but i wonder if it's really the problem as the software shows my power quite stable and the 12v rail is never below 12v. Hmmmm....
This post has been edited by Matrix: Feb 26 2007, 03:15 PM
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mashimarow
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Feb 26 2007, 03:37 PM
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Why not use a 20->24pin convertor socket to plug in your mobo?
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cloudwan
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Feb 26 2007, 03:44 PM
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QUOTE(Matrix @ Feb 26 2007, 03:09 PM) I'm having hang/reboot problem recently....i'm not sure if it's after my upgrade to AMD X2 or since i add in the Creative X-Fi card. Occasionally it'll auto-reboot on bootup, maybe hangs at startup or after startup. It's not too frequent, but enough to annoy and worries me. My main rig in sig. I don't think this rig use too much power...my current PSU is quite a decent PSU, costing RM200 2 or 3 years ago. However it's only 20pin and i'm using a 24-pin mobo (meaning 4 pin has no power)....could this be the cause of problem?? I'm also looking into buying a new PSU but i wonder if it's really the problem as the software shows my power quite stable and the 12v rail is never below 12v. Hmmmm.... Hmmmm last time when my rig used the same mobo as yours n an enlight 420Watt PSU i faced the same prob as yours.. My PC sometimes reboots or hangs suddenly or wont start at all.. After i change the mobo n PSU the prob disappear.. Not really sure which is the culprit.. The mobo or the PSU..
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vassalle
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Feb 26 2007, 04:11 PM
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QUOTE(mashimarow @ Feb 26 2007, 03:07 PM) Acbel is a strong 12V PSU, your 450W should enough to run 8800GTS under minimal setup but not GTX. For safety, you can use a program to check the 12V rail, if it is running lower than 11.60, consider your PSU is overwork. Normally a strong PSU should maintain around 11.90 In term of modern usage, A 26A on 12V rail consider healthy. However depends on your usage, such as using 8800, 26A may not enough. 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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vey99
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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? 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 ...
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Kataro
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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? I think it is not overkill as it will be sufficient to support in case nVidia come out with another more power hunger gc in the future or in case you wanna add more hardware such as hdd, optical drive, high amp fan or what ever you name it...
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SUSMatrix
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Feb 26 2007, 04:48 PM
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QUOTE(mashimarow @ Feb 26 2007, 03:37 PM) Why not use a 20->24pin convertor socket to plug in your mobo? okay, will try to get one of those thing...hopefully can get it around my office. I'll also try to move my X-Fi to another PCI slot and see what happens.
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