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post #11 of 14
Quote:
Originally Posted by iamatechnoob View Post


Great informative reply! Thanks for the links.

Hmm, I'm not very good with all these but from what I've read, shouldn't a 90% efficient psu draw 427w to supply a need for 384w? I apologise if I'm mistaken. Which are some of the better brands for PSU? I can get any brand actually, we have everything here that you have in the States (:

 

Nope, that's backwards. If a PSU is 90% efficient while pulling 384W from the wall outlet, then that means the computer is only pulling 345W from the PSU. What you're saying is that the computer is pulling 384W from the PSU, but it's not: it's the PSU pulling 384W from the wall outlet. Therefore, we have to estimate an efficiency in order to estimate how much power the computer is pulling from the PSU. Since it seems to me that no one really wants a Bronze-rated PSU anymore (even though the 80+ Certification is just marketing hype), I just assume 90% efficiency instead of 85%.

 

Anyway, when it comes to PSUs, it's not about brands; it's about the individual units. Going just by the brand name is just about as good as going by the color of the PSU or something like that.


Edited by TwoCables - 5/23/13 at 2:58pm
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It's a computer!
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CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
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Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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post #12 of 14
Thread Starter 
Quote:
Originally Posted by shilka View Post

You dont look at the brands you look at the models the brands have

The Reason for this almost every brand does not make their own PSU´s they buy from OEM´s and some brands can have 4-6 OEM´s they buy from
Ahh okay. I read on some forum that I should look out for more 'trustworthy' brands when getting PSU. What are some decent models that you would recommend?
Quote:
Originally Posted by Schmuckley View Post

If you're not in US...Superflower is a good maker biggrin.gif
Make sure most of the watts are on a single 12v rail.
I'd recommend 500-550 at least.
Haha Superflower.. okay I'll try to keep a lookout for it. What do you mean by "most of the watts are on a single 12V rail?
Quote:
Originally Posted by TwoCables View Post

Nope, that's backwards. If a PSU is 90% efficient while pulling 384W from the wall outlet, then that means the computer is only pulling 345W from the PSU. What you're saying is that the computer is pulling 384W from the PSU, but it's not: it's the PSU pulling 384W from the wall outlet. Therefore, we have to estimate an efficiency in order to estimate how much power the computer is pulling from the PSU. Since it seems to me that no one really wants a Bronze-rated PSU anymore (even though the 80+ Certification is just marketing hype), I just assume 90% efficiency instead of 85%.
Oh okay, thanks for clarifying that, though I'm still a little muddled tongue.gif

So I should try to get something that's higher than Bronze-rated?
post #13 of 14
Quote:
Originally Posted by iamatechnoob View Post

Ahh okay. I read on some forum that I should look out for more 'trustworthy' brands when getting PSU. What are some decent models that you would recommend?
Haha Superflower.. okay I'll try to keep a lookout for it. What do you mean by "most of the watts are on a single 12V rail?
Oh okay, thanks for clarifying that, though I'm still a little muddled tongue.gif

So I should try to get something that's higher than Bronze-rated?

PSU efficiency has nothing to do with quality you can find crappy 80 plus gold rated PSU´s

Again never look at the brand of the PSU you might as well look at the color of the PSU brand means nothing
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Seravee
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post #14 of 14
Quote:
Originally Posted by iamatechnoob View Post


Ahh okay. I read on some forum that I should look out for more 'trustworthy' brands when getting PSU. What are some decent models that you would recommend?

 

It's not about brands, but it's about the individual units. You may begin noticing over time that when some of us recommend PSUs, we aren't being loyal to any brands. Sometimes it will seem like it, but that's always a coincidence and it's usually due to prices. For this reason, I try to avoid even considering Corsair's PSUs when I make a list of recommended PSUs. ;) Yep, I'm saying that Corsair's PSUs are usually overpriced and you can usually get something as good as or better for the same price or less (you can usually get more for less by avoiding Corsair's PSUs).

 

 

Quote:
Originally Posted by iamatechnoob View Post

Haha Superflower.. okay I'll try to keep a lookout for it. What do you mean by "most of the watts are on a single 12V rail?

 

With all due respect to my friend Schmuckley, I don't think he fully understands what he's saying. At the risk of being wrong (regarding what he might be saying), I think he's trying to say to look for a PSU that has a single +12V rail where that +12V rail's capacity is very close to the total wattage rating of the PSU (almost all good quality-made PSUs have a +12V capacity that's extremely close to the total wattage rating of the PSU, like a difference of only a few watts in some cases). I think that this aspect is not important enough to mention, especially when you can just sit back, relax, and allow us to recommend PSUs. ;) Besides, it's also not entirely correct either to look for single-rail units unless we're talking about PSUs with a very large wattage capacity of like maybe 850W or more. Then, and only then is it slightly better to have a single +12V rail. When you get below like 750W or so, it doesn't matter if it's a multi-rail unit.

 

Here's more info on that in a playfully-written article by our good friend Phaedrus2129:

 

Single Rail vs. Multi Rail *Explained*

 

The article below explains what's usually powered by each rail (+3.3V, +5V, +12V, etc.):

 

On PSU Voltages

 

The reason why something is powered by the +3.3V is that part runs on 3.3V power. So the reason why something would be powered by the +5V rail is it runs on 5V power, and anything powered by the +12V rail runs on 12V power.

 

 

Quote:
Originally Posted by iamatechnoob View Post

Oh okay, thanks for clarifying that, though I'm still a little muddled tongue.gif

 

What are you still a little muddled on? I want to clarify everything so that you can understand it just as well as I can.

 

 

Quote:
Originally Posted by iamatechnoob View Post

So I should try to get something that's higher than Bronze-rated?


I don't have a good answer for this question. I mean, it's better to ignore the 80+ Certification because it's just marketing hype.


Edited by TwoCables - 5/30/13 at 5:24am
It's a computer!
(18 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
CoolingOSMonitorKeyboard
Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
AudioAudio
X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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Reply
It's a computer!
(18 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
CoolingOSMonitorKeyboard
Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
AudioAudio
X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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Reply
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