PSU for GTX 660 SC Signature 2 (24A on +12Volt rail)

I have PSU fortron saga II 500W
http://www.mygarage.ro/attachments/teste-si-review-uri/109670d1283271339-mini-review-fortron-saga-ii-500-s7300427.jpg
and want to ask whether it can be enough for

EVGA GeForce GTX 660 3GB SC Signature 2
http://eu.evga.com/products/moreinfo.asp?pn=03G-P4-2665-KR&pwindow=specs&family=&sw=

I know that 500W should be enough, but requirements also state:
Minimum of a 450 Watt power supply.
(Minimum recommended power supply with +12 Volt current rating of 24 Amps.)

picture shows
+12V1 +12V2
18A 18A

so can this PSU support this card, or do I need one where there is 24A under +12Volt rail?

thank you
revro
6 answers Last reply
More about signature 12volt rail
  1. wait, if TDP of card is 140W and its on 12Volt rail, does it mean that 24A is needed for entire system and the 18 is enough as its more that 140W/12V?

    thank you
    revro
  2. Well 18A only gets 216w, 2 rails 18a gets 408w for the card alone, the 660 gtx max drawn is 140-150w.
    So it will do, although the brand is a shoddy one.
  3. FSP is fortron and its 80 PLUS Bronze Certified - it´s efficiency >82% (http://www.partis.cz/index.php?gid=1535)
    also my current setup with c2d e7500 @stock draws from wall cca 140W under full load in games
    (cpu itself has 77Watt TDP, 5750 has TDP of 86W and 660 SC S2 has TDP 140W)

    best
    revro
  4. djangoringo said:
    Well 18A only gets 216w, 2 rails 18a gets 408w for the card alone, the 660 gtx max drawn is 140-150w.
    So it will do, although the brand is a shoddy one.


    FSP is not a shoddy brand. Its AURUM and RAIDER series are better than most Corsair PSUs.
  5. with q9550 and gtx 660 ftw signature 2 i am having top power usage 226Watt, so i am really ok with it

    best
    revro
  6. The FSP unit can output 408w on the 12v rail which translates to 34 amps. 34 amps is more than capable enough for a single GTX 660 and a Q9550 along with some overclocking. It's a decent psu and you'll be fine with it.
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