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Seasonic S12ii-520 80plus bronze 520watts enough??

Hello guys!! I've already bought the following components:

Intel I7 4770
Asus Z87a (i know i didn't need a Z motherboard, but I got a good price combo)
2x4gb Team Vulcan 1600 mhz RAM (will get 2 more in the future)
2 (3 or 4 in the future) HDDs mostly WD Black
1 dvd/cd writer/reader
1 ssd 120 gb
1 usb audio interface
1 or 2 USB midi controllers
1 old 9800gt which i' ll probably not use.
The case is a sentey DS1-4243

I only need the power supply now so, my question is if you think this power supply will be enough for my system since I don't plan on overclocking or hardcore gaming. Im mostly a music (and sometimes video) producer.

I also have in mind a 650w or 750w Sentey sdp which is 80plus. Take in mind that where I live we don't usually get good brands (antec, corsair, high end coolermaster), or they are insanely costly, so its really nice to be able to get a seasonic at decent price. We also have some thermaltake ann extreme power cooler master for example.

Thank you very much!
8 answers Last reply Best Answer
More about seasonic s12ii 520 80plus bronze 520watts
  1. yea its more then enough if you are not using a high end graphics card (or no graphics card), and its also a great psu
  2. For a system using a single GeForce 9800 GT graphics card NVIDIA specifies a minimum of a 400 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 26 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

    Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

    The Seasonic S12II-520 Bronze power supply unit, with its maximum combined +12 Volt continuous current rating of 40 Amps and with one 6-pin and one (6+2)-pin PCI Express supplementary power connectors, is way more than sufficient to power your system configuration with a single GeForce 9800 GT graphics card. Although this power supply unit doesn't have Haswell certification it may still work with Haswell's C6/C7 power states.
  3. Thank you very much both of you for your answers. I may get something like a gtx650 or below but not for some time. Id like to know what do you mean with the haswell certificiation and the "MAY STILL work with C6/C7 power states" that got me really worried. Also I'm linkin to the Sentey so you can give it a look :) http://www.sentey.com/en_productos_details.php?tipo=Fuentes&ctg=Solid%20Power%20SS&prod=sdp750-ss
  4. martinmaroni said:
    Thank you very much both of you for your answers. I may get something like a gtx650 or below but not for some time. Id like to know what do you mean with the haswell certificiation and the "MAY STILL work with C6/C7 power states" that got me really worried. Also I'm linkin to the Sentey so you can give it a look :) http://www.sentey.com/en_productos_details.php?tipo=Fuentes&ctg=Solid%20Power%20SS&prod=sdp750-ss



    Sentey doesn't provide any information about Haswell compatibility.

    Based on the link to the model you are looking at it should be Haswell compatible since that model uses modern DC to DC convertor circuitry for the +3.3V and +5V rails.
  5. Thank you ko888. Just to be clear, can you explain what you meant with c6/c7 power states??
  6. martinmaroni said:
    Thank you ko888. Just to be clear, can you explain what you meant with c6/c7 power states??


    Haswell processors can enter a sleep state called C6/C7 that can drop processor power usage as low as 0.05A. Even if the sleeping CPU is the only load on the +12V rail, most power supplies can handle a load this low. The potential problem comes up when there is still a substantial load on the power supply's non-primary rails (the +3.3V and +5V). If the load on these non-primary rails are above a certain threshold (which varies by PSU), the +12V can go out of spec (voltages greater than +12.6V). If the +12V is out of spec when the motherboard comes out of the sleep state, the PSU's protection may prevent the PSU from running and will cause the power supply to "latch off". This will require the user to cycle the power on their power supply using the power switch on the back of the unit.

    A suggested work around (i.e. not a solution) was to disable the advanced C6/C7 sleep states in the motherboard's BIOS Setup.
  7. Thank you again Ko888. So, finally, what would you choose?? As I said I may change my 9800gt for a gtx650 (or lower). I need it to be the more silent as possible too.
  8. Best answer
    The Seasonic S12II-520 Bronze will behave detrimentally when the load is greatly misbalanced towards the +5V and +3.3V rails (i.e. heavily cross-loaded) then the output voltages will deflect more than the acceptable 5% allowed by the ATX12V specifications. This is the drawback of group regulated power supplies.

    The Sentey Solid Power SS SDP650-SS or SDP750-SS shouldn't react that way. The only drawback of those two Sentey models is the low quality of the electrolytic capacitors (i.e. CapXon) used in its construction. The manufacturer's 5 year warranty should cover that though.
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