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Kill a watt accuracy to measure total power required on max load - Page 2

Poll Results: Would you trust a "Kill a watt" power meter unit to get an average idea of your total PC power consumption ?

This is a multiple choice poll
  • 100% of voters (2)
    Yes totally
  • 0% of voters (0)
    No
2 Total Votes  
post #11 of 20
Thread Starter 
Quote:
Originally Posted by shilka View Post

Ah i can see the 12v rails are rated for 320 watts combined so it is a 320 watt unit.
But its not clear if they mean 320 watts peak or 320 watts continuous?

They dont say anything about the 5v and 3,3v rails and it even has a -12 rail which means this PSU is very very old.

 

Ok. i'll search more on it (model seems to be CFH0320AWWA)

post #12 of 20
Thread Starter 

SelfEdit: thread clean up. (post not relevant anymore)


Edited by marccoc - 9/21/15 at 12:27pm
post #13 of 20
If its a HP branded PSU then the OEM is probably Delta since they are the bigest OEM in the world and have made a ton for HP over the years.
Dont think i have ever seen a bad Delta PSU before.
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Seravee
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post #14 of 20
Thread Starter 
Quote:
Originally Posted by shilka View Post

If its a HP branded PSU then the OEM is probably Delta since they are the bigest OEM in the world and have made a ton for HP over the years.
Dont think i have ever seen a bad Delta PSU before.

ok I confirm. from the tech sheet (http://bit.ly/1iTzrKO)

So if i'm trying to reccap all this.. what exactly it means to me as to that 139 watt displayed on full load on my kill a watt .. ?

post #15 of 20
Quote:
Originally Posted by marccoc View Post

ok I confirm. from the tech sheet (http://bit.ly/1iTzrKO)
So if i'm trying to reccap all this.. what exactly it means to me as to that 139 watt displayed on full load on my kill a watt .. ?
On Efficiency
Seravee
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Seravee
(27 items)
 
  
CPUMotherboardGraphicsRAM
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LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
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Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
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Onkyo TX NR646  Dali Opticon Vokal x2 Dali Opticon 2 x2 Dali Opticon 1 
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post #16 of 20
Thread Starter 
Quote:
Originally Posted by shilka View Post


On Efficiency

 

Ok got it.

so basically, ... this below

 

by shilka
lets assume its the standard one and lets say it can do 75% efficiency which means you can take 25% off those 139 watts which give you 104 watts.
lets knock 30% off what they claim that PSU can max do and say it can do 225 watts which means you got about 120 watts left.

But how much of that is on the 12v rail i do not know          

 

 

 

So, I've got ~120W available for my GPU on worst load scenario (which doesnt happen very often since i'm a casual gamer...)

... I'm tempted to get that 120W TDP 960 GTX :)    even though it's little border line ...  a safer bet would be that new 950 GTX @90W TDP..

 

*Also, I forgot to unplugg the HDD. So i'm not sure how much I should remove from that 139 watt when the HDD would be off.

Your help is very much appreciated ! learned stuff here


Edited by marccoc - 9/21/15 at 12:50pm
post #17 of 20
A HDD is like 5 watts or less so it does not really matter, same with SSD RAM and fans those are like 2-3 watts.
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Onkyo TX NR646  Dali Opticon Vokal x2 Dali Opticon 2 x2 Dali Opticon 1 
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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 WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Dali Opticon Vokal x2 Dali Opticon 2 x2 Dali Opticon 1 
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Dali E12 F Subwoofer CableMod E series PSU cable set CableMod LED Strips 
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post #18 of 20
Thread Starter 
Quote:
Originally Posted by shilka View Post

A HDD is like 5 watts or less so it does not really matter, same with SSD RAM and fans those are like 2-3 watts.

 

ok. I think I will get more familiar with my system and that gpu before attempting such a risky upgrade.

 

Not to mention that every componant are stock right now.. I guess OCing that CPU from 3.4 to 3.8Ghz will increase power demand.. same for that 750 Ti gpu...

I'll try to play with those a little bit and see the overall Watt consumption before considering any gpu upgrade.. (yea that is a kind of self-advice... I just thought of)

 

would you agree ?

post #19 of 20
Quote:
Originally Posted by marccoc View Post

ok. I think I will get more familiar with my system and that gpu before attempting such a risky upgrade.

Not to mention that every componant are stock right now.. I guess OCing that CPU from 3.4 to 3.8Ghz will increase power demand.. same for that 750 Ti gpu...
I'll try to play with those a little bit and see the overall Watt consumption before considering any gpu upgrade.. (yea that is a kind of self-advice... I just thought of)

would you agree ?
Sounds fine.
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 WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Dali Opticon Vokal x2 Dali Opticon 2 x2 Dali Opticon 1 
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Dali E12 F Subwoofer CableMod E series PSU cable set CableMod LED Strips 
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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 WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Dali Opticon Vokal x2 Dali Opticon 2 x2 Dali Opticon 1 
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post #20 of 20

Let's say that your PSU is exactly 70% efficient while pulling 139W from the wall outlet. If that were the case,  then your computer was pulling 97.3W from the PSU (multiply 139 x .70). If it was 90% efficient while pulling 139W from the wall outlet, then that would mean that your computer pulled 125W from the PSU (multiply 139 x .90).

 

I feel that this pretty much sums it up. I see that it says "Standard Efficiency" on it. I don't know what they mean by that, but I would bet that it's not 90%! It might be 70 or 80%.

 

We also don't know what its +12V capacity is. Without knowing that, I don't know if this could be considered to be a Continuous or a Peak PSU. You see, I know that it shows two 16A +12V rails, but those are like trip points, which means that we can't just add the two rails together to find the +12V capacity. The only way to know the +12V capacity is by finding out from the OEM manufacturer of this PSU is, whoever it is (hopefully it's Delta!).

 

I can make some guesses though. If the 320W capacity is the PEAK capacity, then the +12V capacity is probably about 19 to 20A, which would be about 230-240W. If that were the case, then this would really be a modern-day equivalent to a 250W PSU since the biggest concern in a modern computer is the 12V power consumption.

 

If the 320W capacity is the continuous capacity, then the +12V capacity is probably closer to about 290W, or really, 24A which is 288W. Or, it might even be 25A, which is 300W. We will never know. If the 320W rating is a continuous rating though, then we could probably call this a 400W peak-rated PSU. However, I sincerely doubt that it has a 400W peak capacity. It's probably 320W, and a PSU's peak capacity can really only be pulled for a few seconds at most, unless it's a super high-end PSU.

 

I also find it to be suspicious or strange that they don't list the +3.3V and +5V capacities. heh

It's a computer!
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It's a computer!
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250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
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Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
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Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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