• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

dual 12v rails or single...

Page 3 - Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech.
all serious ocers use single fat 12.

I use Enermax eg651p-ve-fma 36A but cost may be a prob @135.. My next PSU will be a turbocool 510.
 
Originally posted by: wisdomtooth
Originally posted by: AnotherGuy
ribbon ur the first person who doesnt recommend an Enermax coz of noise... where that come from.... many plp use Enermax
Click to expand...

In a quiet PC, you are trying to eliminate as many fans as possible. A PSU with a single 120mm fan will ALWAYS be quieter than a unit with two 80mm fans. A 120mm fan can spin slower and quieter, while moving the same amount of air as a faster-spinning, noisier 80mm fan.

For quietness, definitely Seasonic over Enermax.
Click to expand...

Here, here Wisdom, touche ! 😀
 
Originally posted by: Zebo
I would seriously look into this PSU on your budget fat 35A 12 marketed by newegg (rosewill) read the reviews there. No PSU can touch this specs for price.
http://www2.newegg.com/OldVersion/app/V...Desc.asp?description=17-182-010&depa=0
Click to expand...

Who is this Rosewill anyway ? I notice their name on almost every PC component under the sun; P/S, LCD monitors, optical drivee, u name it.

Are they manufactured by someone we know and just have the Rosewill name stamped on them ?

Do they build quality components ???
 
It's neweggs name brand. They pick great manufactures to make stuff. You bypass middle man and all the associated middle man expenses.. marketing.. staff etc. There's only 4-5 PSU companies almost all sold at newegg are marketing cos.
 
I finally found what could be the right answer... or at least what I wanted to be answered in this thread...
This explains how Dual rail exactly works:

Originally posted by: syar2003

Eddie i guess we perhaps both have got it wrong . the dual 12v rails are independent and have seperate short circuit protections
as well as the current .

Looking again through the atx12v 2.03 design guide from page 35 .

This is how the design is specified :

+12v1
The +12v connectors in the 20/24 pin is +12vDC-1 rail
The SATA drive power connectors +12v is +12vDC-1 rail
The 4 pins molexes for drives and peripherals is +12vDC-1 rail
The floppy drive connector has +12v from +12vDC-1 rail

+12v2
The 4 pin / 8pin P4 connector has +12v from the +12vDC-2 rail .

http://www.formfactors.org/developer%5Cspecs%5CATX12V%20PSDG2.01.pdf


I was mistaking earlier , thinking the +12v in P4pin and 24pin shared the same rail , and peripherals the other .


So my conclusion is that 15A for the cpu and the other 15A for the rest is probably
less powerful than a single railed 30A if the P4 rail is cpu exclusive in the motherboard design using dual rail psu's.
Perhaps this design is for making it more futureproof than the older specs were , that have been changed a lot of times over the last years.
15A for cpu will sure be enough for a long time regarding single cores Athlon64's when the most wattage hungry
is at max theoretical thermal power @ 89w and 130nm technology , the math will then suggest 7-8A.
Click to expand...


This was taken from an MSI HQ Forum heres link http://forum.msi.com.tw/index.php?topic=76423.0
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top