Do I have a large enough power supply for my Dell Vostro Quad Desktop?

I have a Dell Vostro 220 mini-tower with these specs:
CPU: Core2Quad Q8400 2.66
2GB Non-ECC 800MHz DDR2, 2X1GB
Two 250GB Serial ATA Hard Drives 7200RPM, 8MB
16X DVD+/-RW Drive 8X DVD+/-RW with double-layer DVD+/-R write capability,
I’ve also added a NVIDIA GEFORCE 8600 GT 512MB PCI-E Video Card
A Creative Audigy 2 ZS soundcard
And a 56K PCI Modem.
I have a labtec mic going into the Audigy card,
Microsoft 6000 Wireless Keyboard and Mouse
and a Logitech 9000 Pro Webcam.
There is a case fan and the CPU fan.

The power supply is a HIPRO HP-P3017F3 with a max output of 300W.
Is this enough of a power supply for what I am running?  
Alan SilvermanOwnerAsked:
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It is a little on the low side, but for those specs as is, it is enough.  I'd increase it to at least 500W if you can, but even on the 300W it should run fine.  your CPU uses 95 watt, hdd's probably roughly 8watts in read/write.  The rest of the stuff won't be using more than +- 140w.

Still instead of just enough, I'd personally go for more than enough.

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Mino DCCommented:
With a 300W power supply unable to meet the power demands of your PC.

Going to the website of, you can see how Dell Vostro 220 and above, with characteristics similar to yours, have 300W power supply.

View here in Tech Specs tab:

The minimum requirement for your video card is 300w.  But, as your card doesnt require an extra 6pin power cable, you should run fine.  Although I would take Kruger monkey's advice and go with a 500w.  Gives you a little more flexiblility.  Good luck!
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Besides, if you are using a stock powersupply, it is probably garbage anyhow.
Tested on a similar rigs, the total system power is less than 200W so you are fine. No need to go for a 500W, because with a system like this the noise of the PSU fan is still acceptable.
calculate the power you need  with :
and allow for a fair margin !
Alan SilvermanOwnerAuthor Commented:
Thanks to you all.  Excellent analysis and suggestions.  
Thanks again,
just a last comment : with older PS - don't assume that they deliver the max output; it lowers with the aging (of the capacitors)
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