450W for 350W system?

[borko3fkovix]

I have a good PSU, corsair vx450w, and I was about to buy a Xeon X5492, but i saw that it has 150W TDP, and i did a quick "Total system power consumption calculator" thingy, and it measured that my total system power would be:

Load Wattage: 349 W
Recommended UPS rating: 700 VA
Recommended PSU Wattage: 399 W

Amperage (combined)
+3.3V +5V +12V
8.9 A 11.2 A 26.2 A
86 W 314 W

Ive heard that its best for PSU's to run at around 50% of their total wattage, and mine is already running at 300W as it is already, is this too much, or should i get a better PSU if i get a get the Xeon ( i might not be able to afford it more than likely), or is it fine if its "under 80%"?
(my system is modded to support 771 xeons, and im running one currently, so no worries there)

 

[weberdarren97]

Online power supply calculators should not be trusted. Please list full system specs so I know what you're trying to power.

 

[badboyrog2]

your psu will work if no overclocking is done

 

[pete_101]

You're fine. The calculation is based on a worst case scenario, how much is required.....this isn't to say you won't use that much, but if you do it will only be for a few seconds. Most of the time you won't even be using half of that.

 

[borko3fkovix]

Online power supply calculators should not be trusted. Please list full system specs so I know what you're trying to power.

i got a 7850 2gig, 2x2gb ddr2 memory, 2 hdd's, and ssd, and a custom, not too big cpu cooler, i dont know if that matters too, and my current cpu is the xeon e5430

 

[weberdarren97]

I think you'll be plenty fine with the one you have now.