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Power usage / per month, did I calculate this right?

post #1 of 15
Thread Starter 
I'm not sure I did this correctly, so if someone could double check these I would appreciate it. I basically just used a PC Power consumption calculator, then based it off the formula below.


Formula:

Wattage * hours used / 1000 * days * electricity rate

In my case:

Wattage (seen below) * 12 hours (way overkill, just to be on the safe side) / 1000 * 30 days * 0.0858 Per KwH

Overclocked:

414w (4.7Ghz / 1.52v - 1000mhz GPU) = $12.78 per month (30 days) 12 hours a day at full load.

_______________________________________________________________________________

Underclocked:

292w (2.8ghz / 1.05v - 1000mhz GPU) = $9.019 per month (30 days) 12 hours a day at full load.

_______________________________________________________________________________

Savings per month, $3.761 per month

Realistically, 50% average load per month:

414w (50% average, 207w) = $6.393 per month

292w (50% average, 146w ) = $4.509 per month

What I would realistically see on the bill, savings = $1.884 per month.


Is that correct, or am I wrong?
    
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post #2 of 15

wait, I asked a question that didn't need to be asked.

It's a computer!
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It's a computer!
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post #3 of 15
414 watts? seems like you got that number from a kill a watt or something?
Seravee
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Seravee
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post #4 of 15
Quote:
Originally Posted by shilka View Post

Your system does not draw 414 watts even when overclock so it seems like you got that number from a kill a watt or something?

 

A "PC power consumption calculator".

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 
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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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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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post #5 of 15
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

A "PC power consumption calculator".

Yeah, THIS one to be exact.
    
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OSMonitorKeyboardPower
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post #6 of 15
Quote:
Originally Posted by Ahnt View Post

Yeah, THIS one to be exact.
Forget what that one tells you its wrong so you just waste your time.
Your system draws around 200-250 watts not 414.
Seravee
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Seravee
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CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD40EZRX  WD Green WD60EZRX  WD Red WD80EFZX 8TB  
Hard DriveOptical DriveCoolingCooling
Seagate Ironwolf Pro 10 TB LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S 
OSMonitorMonitorKeyboard
Windows 7 64 Bit Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB 
PowerCaseMouseMouse Pad
EVGA SuperNova G2 750 watt Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor 
AudioAudioAudioAudio
Sennheiser HD 598 Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal 
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x2 Dali Opticon 2 CableMod E series PSU cable set CableMod LED Strips 
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post #7 of 15
Quote:
Originally Posted by shilka View Post


Forget what that one tells you its wrong so you just waste your time.
Your system draws around 200-250 watts not 414.

 

 

This ^ If its your sig rig there is no way you are pulling 400 watts. Maybe if you count your screen? But not rig alone.

post #8 of 15
It seems that you also don't take efficieny into account? This would mean your formula for calculating the $ costs is faulty.

Lets say your PSU uses 400w and has an efficieny of 90% at the given power consumption of 400w.
Your PC will use 400w, but your PSU will draw 400 / 0,9 x 100% = ~444,44w. ~44,44w is lost and generated as heat.

Your PSU has to transform the power from your wallsocket to actual usable power for your CPU etc. (DC -> AC).

Also the above posters are correct in terms of power consumption, online calculators are bogus.
Stin00
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Stin00
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post #9 of 15
Thread Starter 
Quote:
Originally Posted by shilka View Post

Forget what that one tells you its wrong so you just waste your time.
Your system draws around 200-250 watts not 414.

That seems more accurate. 414w did seem a little on the high side for an overclocked 2500K / HD7850 2GB system.
Quote:
Originally Posted by ozlay View Post


This ^ If its your sig rig there is no way you are pulling 400 watts. Maybe if you count your screen? But not rig alone.

Yep, sig rig. Plus 2 5,400 2.5" HDD's and one USB 3.0 HDD. Other than that, its all in the sig rig info.
Quote:
Originally Posted by stin0 View Post

It seems that you also don't take efficieny into account? This would mean your formula for calculating the $ costs is faulty.

Lets say your PSU uses 400w and has an efficieny of 90% at the given power consumption of 400w.
Your PC will use 400w, but your PSU will draw 400 / 0,9 x 100% = ~444,44w. ~44,44w is lost and generated as heat.

Your PSU has to transform the power from your wallsocket to actual usable power for your CPU etc. (DC -> AC).

Also the above posters are correct in terms of power consumption, online calculators are bogus.

I completely forgot about PSU efficiency tongue.gif Thanks!
    
CPUMotherboardGraphicsRAM
i7 2600 P8P67 Pro GTX 760 2GB 2x4 1866 
Hard DriveHard DriveOptical DriveCooling
Crucial RealSSD C300 128GB Random HDD's / SSD's Samsung Blu-ray  Stock intel 
OSMonitorKeyboardPower
W7 x64 42" Vizio TV. 1080p.  Logitec G15 630w Rosewill 
CaseMouseMouse PadAudio
Generic cheap ass case Dynex, lol Generic cheapy Sony wireless headphones.  
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 2600 P8P67 Pro GTX 760 2GB 2x4 1866 
Hard DriveHard DriveOptical DriveCooling
Crucial RealSSD C300 128GB Random HDD's / SSD's Samsung Blu-ray  Stock intel 
OSMonitorKeyboardPower
W7 x64 42" Vizio TV. 1080p.  Logitec G15 630w Rosewill 
CaseMouseMouse PadAudio
Generic cheap ass case Dynex, lol Generic cheapy Sony wireless headphones.  
  hide details  
Reply
post #10 of 15
Since you own a Rosewill Green and its 80 plus Bronze its max efficiency at 50% load is 86%.
Lets say your average efficiency is 85% which means if you use a kill a watt you have to take those 15% off.

Power draw with the efficiency off should be somewhere around 200-250 watts.
Seravee
(27 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD40EZRX  WD Green WD60EZRX  WD Red WD80EFZX 8TB  
Hard DriveOptical DriveCoolingCooling
Seagate Ironwolf Pro 10 TB LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S 
OSMonitorMonitorKeyboard
Windows 7 64 Bit Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB 
PowerCaseMouseMouse Pad
EVGA SuperNova G2 750 watt Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor 
AudioAudioAudioAudio
Sennheiser HD 598 Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal 
AudioOtherOther
x2 Dali Opticon 2 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
Seravee
(27 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD40EZRX  WD Green WD60EZRX  WD Red WD80EFZX 8TB  
Hard DriveOptical DriveCoolingCooling
Seagate Ironwolf Pro 10 TB LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S 
OSMonitorMonitorKeyboard
Windows 7 64 Bit Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB 
PowerCaseMouseMouse Pad
EVGA SuperNova G2 750 watt Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor 
AudioAudioAudioAudio
Sennheiser HD 598 Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal 
AudioOtherOther
x2 Dali Opticon 2 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
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