General question about PSU's and 2x cards

  wundahorse 19:34 11 May 2008

hi community. General question about PSU's, im looking at getting a 600w PSU tho i only need max 500w for now but thinking about if i upgrade to SLI 2x cards in a year or two.
Id like to know if there is such a thing as having too much power tho i guess you only use what you need?

Also if i did go SLI at a later date do i need 2 of the exact cards ie part no. maker or will 2 of the same spec cards do the job ie any 2 8800gt's with different manufacturers?.
Im just thinking what if i couldnt find the same one in the future

  wundahorse 19:42 11 May 2008

also would like to know if a 550w supply would be enough to carry 2 cards in a mid range spec PC.

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