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Windows 7: PSUs single 12v Rail or more?

23 Oct 2010   #21
Zepher

Windows 7 Ultimate 64bit
 
 

What size PSU would you recommend for a system with the following:
9 7200RPM hard drives, Q6600 Quad Core OC'd to 3Ghz, 8GB of ram (4x2GB), GTX285 and 9600GT, 2 120mm fans, 2 90mm fans, BD/HD-DVD/DVD-RW Drive?


My System SpecsSystem Spec
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23 Oct 2010   #22
sygnus21

Windows 10 Pro
 
 

You could use one of these calculators to help determine what you want/need

- Welcome to Corsair :: Power Supplies
- Antec Power Supply Calculator
- eXtreme Power Supply Calculator

Some people don't like/trust them, but they're fairly accurate. Some people add 100watts for "breathing" room, but...
My System SpecsSystem Spec
23 Oct 2010   #23
LiquidSnak

W7 Professional x64
 
 

I would recommend 1100W for your system, but I do add 50-100 watts for breathing room.

If I need a good recommendation on the fly, I'll take somewhere between Newegg's PSU calculator and Antec's
My System SpecsSystem Spec
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24 Oct 2010   #24
sygnus21

Windows 10 Pro
 
 

I really don't think he needs an 1100 watt power supply for that system.

Playing aorund with those calculators and plugging in his system specs, plus adding a few extras like a floppy, and giving him 2 GTX285's 2gig models, I couldn't reach 850watts!

And doing this without SLI I gave me about 513ish watts.

My two cents.
My System SpecsSystem Spec
24 Oct 2010   #25
Joshatdot

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by sygnus21 View Post
You could use one of these calculators to help determine what you want/need

- Welcome to Corsair :: Power Supplies
- Antec Power Supply Calculator
- eXtreme Power Supply Calculator

Some people don't like/trust them, but they're fairly accurate. Some people add 100watts for "breathing" room, but...
I used the Antec one to see what I would need for my rig once I get the GTS 450 OC. It said I needed 400w.

I just tried it again for Zepher .. Antec says 868w PSU .. so 1000w
My System SpecsSystem Spec
24 Oct 2010   #26
LiquidSnak

W7 Professional x64
 
 

Ah. Antec says this for me:


Attached Images
PSUs single 12v Rail or more?-psucalc.png 
My System SpecsSystem Spec
24 Oct 2010   #27
thefabe

Windows 7 ultimate 64 bit / XP Home sp3
 
 

One thing I've noticed is a lot of people try to save money on their power supply. To me it is one of the most important pieces of hardware you purchase when doing a new build. It's the heart and soul of your system.

So I always recommend that they purchase a Quality Branded PSU with a minimum of 80% efficiency rating.
I also think a modular power supply is the way to go for several reasons one not just being cable management, but not having to charge (send power through) cables your not using.
having said that we also know it's more about the amps than the wattage.

So if your going to use a calculator, then I would add 20% above what is suggested, this would leave you some room to expand your systems hardware.

I like to try and stay around 28 to 32 amps on the 12v rail(s).
Also with any purchase read reviews and find all the information you can before you buy, try to anticipate any upgrades you may make to your system in the future and include them when purchasing your power supply.

Antec. Corsair, OCZ, Silverstone are all quality power supplies.

IMO a 1100w PSU for the above is a little over kill maybe if he was running quad slid or something then yes.
Having 9 hard drives requires more power but their all not being accessed at the same time so the draw would be less then a quad SLI system for instance.

I would have to agree a 850-900w would be more than enough.
Also if you research deep enough you'll find that quite a few lesser known power suppiies are built by the same company as some branded ones we know and love. but to different specs and usualy with lower quality parts.

I ususally figure if I stay around 650 to 800w then your in pretty good shape for future proofing your system in case you decide to add another GPU or Hard drives or more memory.
JMO Fabe
My System SpecsSystem Spec
24 Oct 2010   #28
madtownidiot

 

There's nothing wrong with multiple rail power supplies. but IMO for most home built systems, a single rail PSU is usually the best choice. In the OP's system.. I would recommend using a 850w PSU with a 70A 12v rail, just to have some leeway for the planned upgrades.
My System SpecsSystem Spec
24 Oct 2010   #29
linnemeyerhere

Microsoft Community Contributor Award Recipient

Windows 7 Ultimate 64
 
 

Zepher,
"What size PSU would you recommend for a system with the following:
9 7200RPM hard drives, Q6600 Quad Core OC'd to 3Ghz, 8GB of ram (4x2GB), GTX285 and 9600GT, 2 120mm fans, 2 90mm fans, BD/HD-DVD/DVD-RW Drive?"

Any type of amplification means that having extra head room or current available above and beyond the max draws allows the whole process to work with less strain and this has a profound benefit on the components being driven by the amp. For this reason "I" would look at 1000+ as my starting point for your system and possibly higher I you think at a later date you may get into even more current drawing components.
My System SpecsSystem Spec
24 Oct 2010   #30
sygnus21

Windows 10 Pro
 
 

Quote   Quote: Originally Posted by Joshatdot View Post
Quote   Quote: Originally Posted by sygnus21 View Post
You could use one of these calculators to help determine what you want/need

- Welcome to Corsair :: Power Supplies
- Antec Power Supply Calculator
- eXtreme Power Supply Calculator

Some people don't like/trust them, but they're fairly accurate. Some people add 100watts for "breathing" room, but...
I used the Antec one to see what I would need for my rig once I get the GTS 450 OC. It said I needed 400w.

I just tried it again for Zepher .. Antec says 868w PSU .. so 1000w
Whatever power supply you get, make sure it's a good quality one! I can't state this enough!

Good luck
My System SpecsSystem Spec
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 PSUs single 12v Rail or more?




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