is this PSU sufficient?

So i am buying a EVGA 680i mobo and it requires a 8pin CPU connector. My PSU i used to use up until December of 07 has that 8pin connector (i got a new case with a PSU in it that was more effiicient in ampage) This PSU is 500watt and powered all i had back i ndecember which i still have the same stuff except more fans and diffrent RAM (E6750 cpu, 8800GT, 2 SATA HDD's, 2 dvd drives) and i am wonderign if this wil lbe enough when i put the 680i in because i will be Overclocking as well. I also foudn this PSU which supports 2 9800GX2's and thought it would be god to have for the future

http://www.newegg.com/Product/Product.aspx?Item=N82E16817815001

should i get this or just use my old ne with a 8 pin conenctor?
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  1. or could i use that and get oen of those VGA PSU's ? take sum load off of the main PSU?
  2. I wouldn't buy a 680i motherboard these days. I'd look at 750i and 780i.

    I doubt that the 650W PSU supports two 9800GX2s. I've seen nVidia's list of certified PSUs for that combination. The smallest thing on it was the TurboCool 860W IIRC, and the rest were mostly 1000W or higher.
  3. lol whats wrong with a 680i? its practicly identical to the 750i FTW. Only diff i see is that the 750i supports a defualt of DDr2 1067. Also when i mean 2 9800GX2s i just mean it has those 2 power conencters, 2x 6pin and 2x 8pin or w\e it is.
  4. Here's links to power calculators you can use yourself. The first "lite" version is free and calculates only total wattage while the second has a nominal fee but gives you the requirements for the rails with different power level.

    http://www.extreme.outervision.com/psucalculatorlite.jsp

    http://www.extreme.outervision.com/psucalculator.jsp

    You can use them to see what might be required for later modifications as well.
  5. well i did sum of those a while ago and my old one is good enugh but idk it just doesnt feel right, idk im sure itll work it just feels like it needs more if i plan on doing sum overclocking.

    Also off topic but im lookin at the 750i FTW or 680i SLi, friend is gettign the 750 and im gonan see how it runs for him 1st.
  6. @OP: If planing to run even a single 9800GX2 you probably will need a good 610-750W. (ie PP&C 750)
  7. phantom93 said:
    well i did sum of those a while ago and my old one is good enugh but idk it just doesnt feel right, idk im sure itll work it just feels like it needs more if i plan on doing sum overclocking.


    The calculator has a section to include overclocking - so you will know total with it.

    Also if using an older PSU, bear in mind that they slowly lose effectiveness over time.
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