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Most accurate PSU calculator out there?

post #1 of 16
Thread Starter 
The psu calculator's i have tried all ended up as wrong since the one i tried estimated that the current Coolermaster GX 750w should only use 630 or 660w out of 750, but when i connected the 4'th harddrive, the pc ended many times up at shutting down itself as a "psu sparing" function to not damage the psu with over wattage.

Which calculator is the best one you can suggest?

I have tried:

http://www.extreme.outervision.com/psucalculatorlite.jsp
And
http://www.thermaltake.outervision.com/
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post #2 of 16
Try this one.
http://www.overclock.net/t/1140534/psu-calc-final-release
    
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post #3 of 16
you were trying to run 2 680's on a 750w...
http://www.legitreviews.com/article/1891/12/ 573W just for SLI.
And plus the gx series aren't that great when it comes to power, so it would likely only handle 80% eff
around 675W tops.
post #4 of 16

Those two calculators are identical.

 

I don't recommend calculators, but instead I recommend asking the PSU experts on here.

 

I'm not one of them, but I will say that if you have the plain GX (as opposed to the GX Bronze Series), then I wouldn't be a bit surprised if it is at its limit even though you only have two GTX 680s in your system.  I mean, a quality 750W PSU (as opposed to the plain GX series) would have enough power for your system with three GTX 680s:

 

http://www.guru3d.com/articles_pages/geforce_gtx_680_3_way_sli_review,4.html

 

With three GTX 680s in SLi under full load, their system pulled about 550W from the PSU (649W from the wall).  The CPU was idling, so let's just add 200W to their "at the wall" power draw which was 649W.  That makes 849W which would make the system pull about 721W from the PSU at the most.

 

For two GTX 680s, all of those calculations would come out to be about 572W being pulled from the PSU at the most (or 575W to round it up).

 

I will say here that I've heard nothing but bad things about the plain GX series, so I would replace it if that's what you have.

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post #5 of 16
Quote:
Originally Posted by TwoCables View Post

Those two calculators are identical.

I don't recommend calculators, but instead I recommend asking the PSU experts on here.

I'm not one of them, but I will say that if you have the plain GX (as opposed to the GX Bronze Series), then I wouldn't be a bit surprised if it is at its limit even though you only have two GTX 680s in your system.  I mean, a quality 750W PSU (as opposed to the plain GX series) would have enough power for your system with three GTX 680s:

http://www.guru3d.com/articles_pages/geforce_gtx_680_3_way_sli_review,4.html

With three GTX 680s in SLi under full load, their system pulled about 550W from the PSU (649W from the wall).  The CPU was idling, so let's just add 200W to their "at the wall" power draw which was 649W.  That makes 849W which would make the system pull about 721W from the PSU at the most.

For two GTX 680s, all of those calculations would come out to be about 572W being pulled from the PSU at the most (or 575W to round it up).

I will say here that I've heard nothing but bad things about the plain GX series, so I would replace it if that's what you have.

Pretty much this - quality 650W should be enough for SLI GTX 680s.
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post #6 of 16
Thread Starter 
Ok, cause you see the specs i my signature, and with those the pc works just tine at mostly full load, but when i add my fourth hdd, then the motherboards safe mode comes in...

Till im gettin the money to buy a new psu, which psu could you guys recommend from this site?

(atleast 1000w, cause im soon goin to have 8 storage drives in my pc (2x ssd in raid for OS and 2x caviar black in raid 0 for gaming)and 4 for storage and later another third 460 which my brother borrows atm which im goin to have as physx engine (cannot have tripple sli cause then i have to use the third 680 in an pci-e 2.0 slot))

http://www.komplett.no/k/kl.aspx?mfr=&bn=10061&sortBy=p&zbo2=true&filter=A00526.700-1199.
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post #7 of 16
Hard drive causes the fault? HDD's use around 5W i don't think it's that really, have you tested the drive in another system?
post #8 of 16
Quote:
Originally Posted by sonarctica View Post

Ok, cause you see the specs i my signature, and with those the pc works just tine at mostly full load, but when i add my fourth hdd, then the motherboards safe mode comes in...
Till im gettin the money to buy a new psu, which psu could you guys recommend from this site?
(atleast 1000w, cause im soon goin to have 8 storage drives in my pc (2x ssd in raid for OS and 2x caviar black in raid 0 for gaming)and 4 for storage and later another third 460 which my brother borrows atm which im goin to have as physx engine (cannot have tripple sli cause then i have to use the third 680 in an pci-e 2.0 slot))
http://www.komplett.no/k/kl.aspx?mfr=&bn=10061&sortBy=p&zbo2=true&filter=A00526.700-1199.

 

All that would be needed is a quality 750W power supply.

 

Do you have the GX Bronze, or the plain GX series?

 

The GX Bronze series is a decent quality line while the plain GX is, from what I understand, junk.

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It's a computer!
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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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post #9 of 16
Thread Starter 
Lol, seems like the psu was the problem..

http://www.komplett.no/k/ki.aspx?sku=593204

That is the one i have, so as long as i choose lets say an 850W gold psu, it should use the watts im actually paid for?

(had to buy a good psu when i upgraded from an pentium 4 to a i5-760 then the 450w psu i had died, so had to buy one quickly, so ended up buying the bronze psu from a local computer store )

Is this one a good psu to choose?

http://www.komplett.no/k/ki.aspx?sku=657124#extra $319,13
Edited by sonarctica - 10/24/12 at 4:19am
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post #10 of 16
Quote:
Originally Posted by sonarctica View Post

Lol, seems like the psu was the problem..
http://www.komplett.no/k/ki.aspx?sku=593204
That is the one i have, so as long as i choose lets say an 850W gold psu, it should use the watts im actually paid for?

 

The efficiency refers to how much power is lost as heat.  So, it doesn't have anything to do with how much power it can deliver.

 

Check out this review of the PSU you have:

 

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=188

 

It is basically a "decent 600W unit":

 

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=188 (the last page)

 

This isn't because it's just an 80+ instead of 80+ Gold, but it's just that it's not a very good power supply.

 

 

All that your system needs is a quality 750W power supply at the most:

 

http://www.guru3d.com/articles_pages/geforce_gtx_680_3_way_sli_review,4.html

 

With three GTX 680s in their system under full load, their system caused their PSU to pull 649W from the wall outlet.  The CPU was idling, so let's add 200W and then let's assume the PSU is 85% efficient.  So, if the PSU is 85% efficient while pulling 849W from the wall, then that would mean the system is pulling about 721W from the PSU.


Edited by TwoCables - 10/24/12 at 4:23am
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) 
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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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 
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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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