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PC power use jumps from 280W to 340W, why?

post #1 of 9
Thread Starter 
I did not know where this would fit best and since it relates to power I decided to put it here.

I have a APC BR1500G that has an LCD display that shows have many watts are being used at a point in time. I also have a Kill-A-Watt that shows how many watts are being used at a given point in time.

Only having the PC plugged into the Kill-A-Watt and the Kill-A-Watt plugged into the BR1500G give me two readings that are close enough to say that they are valid.

So on to the question, I can start my PC and it draws 230W at idle. Some days it will idle at 230W all the time and some days all the sudden it will jump to 290W at idle. So why does my PC start drawing an extra 60W all the sudden. Keep in mind that I am monitoring this with both the BR1500G display and the Kill-A-Watt so it is not a faulty reading. Sometimes if will drop back to 230W, but usually once it jumps to 290W it stays there.

Looking at RealTemp the temp of the CPU at idle does not change the the CPU load is the same, 0.03%. Looking at CPU load in Task Manager tells the same story, according to TM the CPU load is 0% at both the 230W reading and the 290W reading.

Any ideas why this is. I am just curious, everything is running fine.
Edited by idahosurge - 6/11/11 at 2:55pm
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OS SSD 840 Pro 256GB / FSX SSD 840 Pro 256GB LG DVD Thermalright SB-E x2 Win7 Ult 64b 
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post #2 of 9
Maybe the cpu throttling is moving your CPU up and down a speed step.
post #3 of 9
Thread Starter 
Quote:
Originally Posted by thrasherht View Post
Maybe the cpu throttling is moving your CPU up and down a speed step.
That is a thought, but in BIOS all of that stuff is disabled. Win7 is set to high performace mode.
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OS SSD 840 Pro 256GB / FSX SSD 840 Pro 256GB LG DVD Thermalright SB-E x2 Win7 Ult 64b 
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Hard DriveOptical DriveCoolingOS
OS SSD 840 Pro 256GB / FSX SSD 840 Pro 256GB LG DVD Thermalright SB-E x2 Win7 Ult 64b 
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post #4 of 9
Is it only the tower or is anything else on it?
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post #5 of 9
is your graphics card downclocking/upclocking itself?
normally when graphics cards are idling they downclock themselves to use less power, the 60watt jump may be from the graphics card clocking itself back at stock clocks.
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post #6 of 9
Quote:
Originally Posted by patawic View Post
is your graphics card downclocking/upclocking itself?
normally when graphics cards are idling they downclock themselves to use less power, the 60watt jump may be from the graphics card clocking itself back at stock clocks.
Was just about to say this, sometime my 3850 will get stuck in 3D clocks.
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post #7 of 9
Maybe the CPU/GPU thinks that you are doing something CPU/GPU intensive and bumps up the CPU/GPU vcore in case you do, you don't and it causes a sudden spike of power draw?
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Yuki
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Illya
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Neptunia
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CoolerMaster Swift-RX XL ASUS Xonar DX Schiit Magni Sennheiser HD650 
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Ducky Shine CoolerMaster V1000 Corsair 760T Artic White Logitech G502 
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post #8 of 9
Thread Starter 
Quote:
Originally Posted by patawic View Post
is your graphics card downclocking/upclocking itself?
normally when graphics cards are idling they downclock themselves to use less power, the 60watt jump may be from the graphics card clocking itself back at stock clocks.
This maybe it, I will start Afterburner in the morning and check about the GPU since when I start it up it is usually at 230W, After it jumps to 290W see what Afterburner has to say about the GPU.
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
4770K @ 4.7GHz / 4400MHz Asus Sabertooth Z87 Gigabyte GTX 780 OC 8GB G.Skill Trident X 9-11-11-31-1T @ 2400MHz 
Hard DriveOptical DriveCoolingOS
OS SSD 840 Pro 256GB / FSX SSD 840 Pro 256GB LG DVD Thermalright SB-E x2 Win7 Ult 64b 
MonitorKeyboardPowerCase
Viewsonic VP2655wb 25.5" IPS LCD Logitech Wireless EX1110 w/Mouse Corsair AX860i CM HAF-X 
  hide details  
Reply
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
4770K @ 4.7GHz / 4400MHz Asus Sabertooth Z87 Gigabyte GTX 780 OC 8GB G.Skill Trident X 9-11-11-31-1T @ 2400MHz 
Hard DriveOptical DriveCoolingOS
OS SSD 840 Pro 256GB / FSX SSD 840 Pro 256GB LG DVD Thermalright SB-E x2 Win7 Ult 64b 
MonitorKeyboardPowerCase
Viewsonic VP2655wb 25.5" IPS LCD Logitech Wireless EX1110 w/Mouse Corsair AX860i CM HAF-X 
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post #9 of 9
Thread Starter 
It is the GPU. At idle it is running at 510MHz. As soon as I start FSX it jumps to 756MHz and the BR1500G display jumps up 60W as soon as the GPU jumps to 756MHz.
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
4770K @ 4.7GHz / 4400MHz Asus Sabertooth Z87 Gigabyte GTX 780 OC 8GB G.Skill Trident X 9-11-11-31-1T @ 2400MHz 
Hard DriveOptical DriveCoolingOS
OS SSD 840 Pro 256GB / FSX SSD 840 Pro 256GB LG DVD Thermalright SB-E x2 Win7 Ult 64b 
MonitorKeyboardPowerCase
Viewsonic VP2655wb 25.5" IPS LCD Logitech Wireless EX1110 w/Mouse Corsair AX860i CM HAF-X 
  hide details  
Reply
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
4770K @ 4.7GHz / 4400MHz Asus Sabertooth Z87 Gigabyte GTX 780 OC 8GB G.Skill Trident X 9-11-11-31-1T @ 2400MHz 
Hard DriveOptical DriveCoolingOS
OS SSD 840 Pro 256GB / FSX SSD 840 Pro 256GB LG DVD Thermalright SB-E x2 Win7 Ult 64b 
MonitorKeyboardPowerCase
Viewsonic VP2655wb 25.5" IPS LCD Logitech Wireless EX1110 w/Mouse Corsair AX860i CM HAF-X 
  hide details  
Reply
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