I have an HP Pavillion and my power supply is only 300w. I would like to upgrade my vid card (I have a PCI express x16 port) and was curious to run the high end cards how big of a power supply should I go? Also do you know are most power supplies standard in size, will they all fit in my tower?
Your case should be able to fit a standard ATX size power supply in it. Most power supplies come in this form factor, so no worries! And for high to ultra-high end cards, I'd go with no less than 700W, like the guy before me said. Just make sure you have decent amp ratings across the +12V rails in the PSU.
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