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Do i have enough power???

post #1 of 17
Thread Starter 
Hello i just bought a thermaltake toughpower 850 gold,
please check out my rig and let me know what you all think.

If i don't have enough power can i safely run a second psu?
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Thermaltake
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post #2 of 17
850 Watts is fine. You have more than enough power to run everything. thumb.gif
post #3 of 17

You have enough power to have three GTX 470s in your system:

 

http://www.guru3d.com/articles_pages/geforce_gtx_470_2_and_3_way_sli_review,23.html

 

With just one GTX 470 under full load in their system, their power supply pulled 411W from the wall outlet.  The CPU was idling, so let's add 150W, which makes the power supply pull 561W from the wall outlet.  If the PSU is 85% efficient while pulling 561W from the wall, then that means the system is pulling about 477W from the PSU.  This power draw of 477W is with both the GTX 470 and the CPU under full load simultaneously.

 

With two GTX 470s and the CPU under full load simultaneously, the power draw from the PSU would be 610W.

 

With three GTX 470s and the CPU under full load simultaneously, it would be about 802W.

 

Your PSU is designed to be able to deliver 850W continuously.  ;)

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It's a computer!
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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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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #4 of 17
should be more then enough smile.gif of my systems is using 3 gtx 470s and draws a bit more then 900 watts from the wall, (907 i think it was?) so more then fine biggrin.gif
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post #5 of 17
Quote:
Originally Posted by DNytAftr View Post

should be more then enough smile.gif of my systems is using 3 gtx 470s and draws a bit more then 900 watts from the wall, (907 i think it was?) so more then fine biggrin.gif

 

That sounds about right because if your PSU is 90% efficient while pulling 907W from the wall, then that would mean your system pulls 816W from the PSU when the PSU pulls 907W from the wall.

It's a computer!
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It's a computer!
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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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #6 of 17
Thread Starter 
I am running 8 hard drives two, how much strain does that add?
Thermaltake
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Thermaltake
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post #7 of 17
Quote:
Originally Posted by Agusta0750 View Post

I am running 8 hard drives two, how much strain does that add?

 

Anywhere from about 5 to 9W per hard drive, depending on how much work the hard drive is doing:

 

http://www.tomshardware.com/reviews/4tb-3tb-hdd,3183-15.html

 

(I am assuming that this can give a general idea that can be applied to most hard drives)

 

So, if you were to make all 8 hard drives completely maxed out to their limits, then the total amount of power being consumed would probably come to 60-80W.  I have to assume that this never happens, so the maximum amount of power all 8 of your hard drives consume at any given time probably doesn't even ever exceed 50W - if that.

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 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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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 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #8 of 17
Thread Starter 
The eXtreme Power Supply Calculator Pro said at 20% capasitor aging i will be pulling 849w.


Also at 120v input from my wall outlet the psu only gets around 88% efficiancy wich gives me only 749 true wattage.

and what about the power in my house, my outlet is running on a 15 amp circut, in wich my psu pulls 11 amps.
So lets say i am pulling another 8 amps off the line with lights, tv and other such things. now the psu isn't getting enough amps.
How much does that effect the life and performance of my psu?

I am considering adding a dedicated 20 amp circuit for my computer.
Thermaltake
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Thermaltake
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post #9 of 17
Quote:
Originally Posted by Agusta0750 View Post

The eXtreme Power Supply Calculator Pro said at 20% capasitor aging i will be pulling 849w.

 

But 20% capacitor aging is unrealistic unless your PSU has been under full load 24/7 for the past few years.  A more realistic figure is about 5-10%, but the problem is that you have a quality-made power supply, so this isn't that much of an issue.

 

Not only that, but the "System Load" in this PSU calculator must be set to about 70% or so unless you are Folding or BOINC'ing 24/7.

 

So, can you use the calculator again?  Except, this time click the calculator's built-in Print button and then post a screenshot of that page in your browser.  I want to show you what the PSU experts on here taught me regarding how to use this calculator correctly so that you don't get extremely over-inflated results like 849W.

 

 

Quote:
Originally Posted by Agusta0750 View Post

Also at 120v input from my wall outlet the psu only gets around 88% efficiancy wich gives me only 749 true wattage.

 

The efficiency works like this:  if your system needs 600W, and if your PSU is 90% efficient, then it has to pull about 667W from the wall outlet in order to deliver 600W to the system.  If the PSU is 85% efficient, then it has to pull about 706W from the wall outlet in order to deliver that 600W to the system.  If the PSU is only 80% efficient, then it has to pull 750W from the wall in order to deliver 600W to the system.

 

So, the efficiency isn't related to the PSU's capacity at all.  Your PSU can continuously deliver 850W because that's how it has been designed.  It is a quality-made 850W power supply.  The efficiency doesn't enter into the capacity rating at all.  In other words, you do not have a 765W power supply because it can be about 90% efficient, nor do you have a 748W power supply because of this assumed 88% efficiency.

 

 

Quote:
Originally Posted by Agusta0750 View Post

and what about the power in my house, my outlet is running on a 15 amp circut, in wich my psu pulls 11 amps.
So lets say i am pulling another 8 amps off the line with lights, tv and other such things. now the psu isn't getting enough amps.
How much does that effect the life and performance of my psu?
I am considering adding a dedicated 20 amp circuit for my computer.

 

I don't know, but why are you asking?  Are you having computer problems?  If not, then everything is fine.

It's a computer!
(19 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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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It's a computer!
(19 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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #10 of 17
I agree that you should be fine on power. It's hard to convince people that you don't always need a huge power supply for a gaming rig. I finally got rid of my 1200w a month ago, haven't used 4 GPUs in years and was still using it.
My new system runs on a 450w. thumb.gif
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