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Need to know TX650w real word power consumption

post #1 of 11
Thread Starter 
Hello.

I recently purchassed a Corsair TX 650 Watt power supply with the knowledge that Watts divided by Volts equals Amps. By this calculation the maximun input in amperage should be 5.6 useing a standard 115V outlet. Yet for some reason they say 9 Amps in their specs, a number far too high for sustained use. I sent an inquary to them about this last night, but have yet to recive a responce. I also tried calling them, and was told to Email Ramguy, which I did. My PSU is supposed to arrive tommorow, and I need this information ASAP. So it is that I am asking all of you TX650w owners to share what information you might have with me.

Thank you.
    
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post #2 of 11
You need to factor in efficiency. 650W DC / ~0.8 = 812.5W AC. Also it can run on as low as 100VAC so 812.5W/100VAC = 8.125A. Seems close enough to me.
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post #3 of 11
Quote:
Originally Posted by Froger The Third View Post
Hello.

I recently purchassed a Corsair TX 650 Watt power supply with the knowledge that Watts divided by Volts equals Amps. By this calculation the maximun input in amperage should be 5.6 useing a standard 115V outlet. Yet for some reason they say 9 Amps in their specs, a number far too high for sustained use. I sent an inquary to them about this last night, but have yet to recive a responce. I also tried calling them, and was told to Email Ramguy, which I did. My PSU is supposed to arrive tommorow, and I need this information ASAP. So it is that I am asking all of you TX650w owners to share what information you might have with me.

Thank you.
BTW, you do know that your system only draws what it needs?
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post #4 of 11
Heh, forgot to mention the psu will only draw what it needs to power your components, the numbers I listed are the max the psu is able to draw from the outlet.
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post #5 of 11
Thread Starter 
Okay... so what should be the amperage at 400 and 500 watt requriements? I heard that higher watt powersupplies are more efficent at lower requirements thus reduceing power consumption. Never knew their was a trade off converting from AC to DC... would think that would be included in the 80 plus percent power efficenecy
    
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post #6 of 11
Quote:
Originally Posted by Froger The Third View Post
Okay... so what should be the amperage at 400 and 500 watt requriements? I heard that higher watt powersupplies are more efficent at lower requirements thus reduceing power consumption. Never knew their was a trade off converting from AC to DC... would think that would be included in the 80 plus percent power efficenecy
(400w/.8)/115VAC = 4.34A
(500w/.8)/115VAC = 5.43A

PSU generally are most efficient at 50-70% load.

All forms of real world conversion are never 100% efficient. The 80+ Program is exactly that. 80%+ efficiency at 20%, 50%, and 100% loads and .9+ PFC.
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post #7 of 11
Thread Starter 
Thanks guys. I was realy worried their for a moment. But now it say's on their website that the thing takes in 10 Amps! How in the world are they getting this number?
    
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CORSAIR CMPSU-650TX 650W ATX12V COOLER MASTER Centurion 534 Black 
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post #8 of 11
Quote:
Originally Posted by Froger The Third View Post
Thanks guys. I was realy worried their for a moment. But now it say's on their website that the thing takes in 10 Amps! How in the world are they getting this number?
worst case scenario for liability reasons.
Once again...
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Once again...
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post #9 of 11
Quote:
Originally Posted by shinji2k View Post
You need to factor in efficiency. 650W DC / ~0.8 = 812.5W AC. Also it can run on as low as 100VAC so 812.5W/100VAC = 8.125A. Seems close enough to me.
This is accurate. You're talking about AC, not DC, which is typically 0.8 times greater than the DC output. Also, the power is rated continuous, not peak, but the input components have to be rated at at least peak in order to ensure that it will not have a melt down under heavy use.
post #10 of 11
Thread Starter 
Allright then. Another question: what does CMPSU mean?
    
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PowerCase
CORSAIR CMPSU-650TX 650W ATX12V COOLER MASTER Centurion 534 Black 
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Reply
    
CPUMotherboardGraphicsRAM
Q6600 GA-EP35-DS3L XFX GeForce 8800GTS (G92) G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 
Hard DriveOptical DriveOSMonitor
Western Digital Caviar SE16 WD5000AAKS 500GB 7200 LITE-ON 20X DVD±R DVD Burner With 12X DVD-RAM Vista Premium 64bit OEM Hanns·G HW-191DPB Black 19" 5ms Widescreen 
PowerCase
CORSAIR CMPSU-650TX 650W ATX12V COOLER MASTER Centurion 534 Black 
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