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Not sure what voltage to pick?

  • Power Supplies
  • GPUs
  • Switch
  • World Of Warcraft
  • Components
Last response: in Components
February 20, 2011 8:05:14 PM

Hey guys last night i picked up a new GPU and PSU, the PSU is 650 w and the GPU needs 550w

i got ...


this is my PC if it helps...;rnav

but ok...theres a switch on the back of the PSU that says minimum and maximum on the manual it says


Select switch Minimum Nominal Maximum

1 103v 115v 132v

2 206v 230v 264v



Max output

so the thing is...what should i put it on MIN or MAX?

I notice the psu is getting a little loud..and the gpu is at like 80 C is this normal? This is my first time upgrading so im not really sure to be honest...for those of you that know about WoW i was right outside Stormwind watching people duel and my GPU was at almost 80 C and PSU was getting a little loud as soon as i closed WoW it went back to normal. Im not sure if this has to do with the GPU or the PSU or just it not getting enough power im not really sure any input would be helpful. Or is this all normal and im just thinking too much of it?

More about : voltage pick

a b ) Power supply
February 20, 2011 8:37:03 PM

Its a shame you bought an Ultra power supply they really are not good units, but you got it so nothing we can do about that. The LSP650 is powerful enough for that GPU so its not that.

The voltage you want it set at is min if you are in the states since we use 110 volt power grid, but just about every other country uses 220 volt power grid so this setting all depends where you live.

80C for the 400 series is about normal maybe a tad on the high side, but this will be more about your cases airflow then anything else.
a c 154 ) Power supply
a b Ý World of Warcraft
February 20, 2011 8:38:44 PM

I wouldn't risk my components to a PSU made by Ultra.
a b ) Power supply
February 20, 2011 8:39:42 PM


Well, first of all, I wouldn't recommend that PSU :

If possible, return it and buy a higher quality one. People often forget that all the other components of their computer is connected to their power supply. If it fries and doesn't have sufficient protection, then everything fries as well. As in the other thread, I'd recommend a Corsair PSU, or Antec (which is second-best, IMO).

As for the output of PSUs, here are two websites that explain it very well :

Now, as for your video card...The 550w value represents the minimal recommended wattage for your PSU. A GTX 465 on max load needs a maximum of 200 watts.
Also, the GTX 465 is obsolete, draws way too much power and runs very hot. You should buy a GTX 560Ti. It outpeforms the 465 in every possible way. Plus, it's only 60$ more for an EVGA Super-Clocked version :

Good luck,