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Need Help! PSU and Amps, should i be worried?

  • Power Supplies
  • Seagate
  • Components
Last response: in Components
July 30, 2009 12:12:31 PM

Hi there

I have a question about my psu. I own a Gigabyte Odin GT 800watt(

It comes with a nice little app called Ptuner to measure your voltages etc.

Here's my system specs:

Intel i7 920 @ 3.8ghz and 1.2 vcore
Zalman 9700Led cooler (temps underload never go over 69 celcius)
Asus P6T Deluxe v1
3x 2gig Kingston HyperX(X.M.P)
MSI Radeon 4870 1Gig @ core 790mhz and mem 1100mhz
1x 750gig Seagate sata
4x 1Tb Seagate sata
6x 1.5Tb Seagate sate
1x LG Dvd writer sata

I've used Extreme Power Supply Calculator and it says that my Wattage is fine.

When I use Ptuner however I'm not so sure. My wattage hits 500 very seldom so that's fine, but I'm worried about my Amp usage on my 12v rails.
Ptuner says that my 12 rails run as follows:
Rail 1 runs at 4.5amps, Rail 2 runs at 5.5amps, Rail 3 runs at 11-17amps, and Rail 4 runs at 5amps.

My 5volt runs at 8amps and my 3.3volt runs at 8.3

These measurements were taken running Prime95(8 threads) and Folding@Home gpu client

Ptuner says I have a max of 18amps per 12v Rail.

Is my pc at risk? Is my psu too "light" for the job?

Please Help!

More about : psu amps worried

a c 144 ) Power supply
July 30, 2009 1:38:18 PM

No. No.

Minus 9 hard drives, I have a similar system being powered by a 550 watt Antec. Adding nine more hard drives will increase power consumption by no more than 160 watts. You have plenty of power.

Are you having anything that could be considered "power problems"? Or are you just concerned?
July 30, 2009 2:20:13 PM

I'm not worried about wattage, I'm worried about amps.
My 12v rails all have 18amps, my 5v has 28 and my 3.3v has 30amps max.

I'm worried about what could happen if the one 12v rail constantly runs at 16-17amps or what could happen if it exceeds the maximum 18amp of the rail.

Could that cause problems?

I have had a couple of drives die on me lately, but they were all the seagate drives with that "known" firmware problem.

As i turned my pc on it fried 2 of the drives. that's about 2 weeks ago. It hasn't happened again and the pc is running rock solid even at full load for 2 days now.
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a b ) Power supply
July 30, 2009 4:21:53 PM

It is generally best to use a PSU which has enough native connectors for your components.

BTW your 12V rails are not all 18A; 3 and 4 are 25A.
July 30, 2009 4:36:36 PM

How do you know that 3 and 4 are 25A?
July 30, 2009 4:46:17 PM

Sorry I was being a noob... I went to gigabytes site and saw that indeed rails 3 and 4 are 25A each.

Thank you for pointing that out for me.

Now I'm satisfied that my system is safe and stable with my current hardware.
a b ) Power supply
July 30, 2009 4:48:34 PM

Ram_85 said:
How do you know that 3 and 4 are 25A?

From the PSU specs on Gigabyte's website.

Too late. :) 
July 30, 2009 4:57:25 PM

Lol. Thanks a lot for your effort bud :)