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Want to buy 550 ti but power supply has just one 6-pin power connector

Hello,
I have a circle power supply of 400 W, which came preinstalled in a circle cabinet, and it has a power supply wattage of 400W
However, there is only one 6-pin connector which supplies power to the motherboard.
I know GTX 550 Ti needs an additional 75 W power connector. Can anything be done ? I dont want to spend additional money buying a new power supply...
Is it essential for me to have a power supply with two 6-pin power connectors ?
and WT* are power rails ??
13 answers Last reply Best Answer
More about want power supply power connector
  1. http://www.google.co.za/imgres?q=PCI-e+power+to+molex&um=1&hl=en&sa=N&tbo=d&biw=1440&bih=775&tbm=isch&tbnid=9zhRIS1EwgZIWM:&imgrefurl=http://www.avforums.com/forums/graphics-cards-internal-video-devices/1047854-installed-geforce-9800gt-info-shows-no-enough-power.html&docid=5r3Ge-CD25wa2M&imgurl=http://www.avforums.com/forums/attachments/graphics-cards-internal-video-devices/131465d1248975574-installed-geforce-9800gt-info-shows-no-enough-power-molex_pci-e.jpg&w=350&h=350&ei=RzXEUL_cEYrRhAfAyICYAQ&zoom=1

    You can purchase one of those to convert molex to a PCI-e 6pin connector. (this is not really suggested if your PSU does not have sufficient amps on the 12v rail).

    A rail is like a lane that power can move through.

    Open up your case and post a photo of the specs on the side of the PSU. I will tell you if it has enough power to run a GTX550ti, but I doubt it will. 400W built in PSUs are usuall junk and do not deliver the rated wattage most of the time...
  2. For a system using a single GeForce GTX 550 Ti graphics card NVIDIA specifies a minimum of a 400 Watt or greater power supply that has a combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

    Your Circle 400W SMPS will most likely have a combined +12 Volt continuous current rating of 16 or 17 Amps which is grossly insufficient to power a system with a single GeForce GTX 550 Ti.
  3. ko888 said:
    For a system using a single GeForce GTX 550 Ti graphics card NVIDIA specifies a minimum of a 400 Watt or greater power supply that has a combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

    Your Circle 400W SMPS will most likely have a combined +12 Volt continuous current rating of 16 or 17 Amps which is grossly insufficient to power a system with a single GeForce GTX 550 Ti.


    LOL really? Give me a chance to confirm first... LOL

    He may have been lucky with his PSU, but as I said, I doubt it...
  4. Novuake said:
    LOL really? Give me a chance to confirm first... LOL

    He may have been lucky with his PSU, but as I said, I doubt it...

    Circle is one of those low end brands available only in India. They are usually based on old obsolete power supply designs that are biased towards the +3.3V and +5V rails and lack APFC and automatic input voltage detection.
  5. ko888 said:
    Circle is one of those low end brands available only in India. They are usually based on old obsolete power supply designs that are biased towards the +3.3V and +5V rails and lack APFC and automatic input voltage detection.


    Cool I don't know the brand...
  6. Thank you all for your answers,here is an image of my PSU ( sorry for poor image quality :( )


    Anyway, Can you please suggest a few good brands of 500W PSU, that wont be too costly for me to buy.
    Thanks a lottt..

    (Budget around 4000 Rupees (INR) or < 100$ )
  7. friendz101 said:
    Thank you all for your answers,here is an image of my PSU ( sorry for poor image quality :( )
    http://i461.photobucket.com/albums/qq331/friendz10101/IMG_20121209_112233_zps97b4d3b8.jpg

    Anyway, Can you please suggest a few good brands of 500W PSU, that wont be too costly for me to buy.
    Thanks a lottt..

    (Budget around 4000 Rupees (INR) or < 100$ )


    Ok that PSU is VERY underpowered.

    Try and find a Antec NEO ECO 520W. Those are very cheap but very good.
  8. The Corsair Builder Series VS450 (CP-9020009), with its combined +12 Volt continuous current rating of 30 Amps and with one 6-pin PCI Express supplementary power connector, is sufficient to power your system configuration with a single GeForce GTX 550 Ti.

    Rs. 2428 (Price inclusive of taxes)
    http://www.flipkart.com/corsair-vs450-450-watts-psu/p/itmdbfa3kaffmum3?pid=PSUDBF9ZBHSJVGJ8&ref=d3995e4f-ec5b-438e-a9bf-bbe83af622fc


    The Antec Basiq Series 450 Watts (VP450P), with its combined +12 Volt continuous current rating of 30 Amps and with one 6-pin PCI Express supplementary power connector, is sufficient to power your system configuration with a single GeForce GTX 550 Ti.

    Rs. 3005 (Prices inclusive of taxes)
    http://www.flipkart.com/antec-vp450-450-watts-psu/p/itmd5xz5xn9gpgtz?pid=PSUD5XZ4YTUBFJEZ&ref=cfb72227-1ec9-433a-b333-416e88dd7c40


    The Corsair Builder Series VS550 (CP-9020050-WW), with its combined +12 Volt continuous current rating of 42 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single GeForce GTX 550 Ti.

    Rs. 3278 (Prices inclusive of taxes)
    http://www.flipkart.com/corsair-vs550-80-plus-certified-550-watt-psu/p/itmdg36xx8yzgjrs?pid=PSUDG34775NHYDHK&ref=c04e5647-337f-45fe-86a0-256ad86b714b
  9. ^ I'd second that Antec VP-450, was a proud owner of it and it was a great unit. In addition, the NEO 520 is also a great power supply but might be a bit pricy, but I believe it is made by Seasonic with a few changes. Seasonic is a very reliable brand....
  10. Thank you so much for suggesting links of flipkart, since i m usually a flipkart buyer :bounce:

    Anyway, would you recommend this one :

    http://www.flipkart.com/corsair-cmpsu-430cxv2uk-430-watts-psu/p/itmd5xz5qs9mhqmq?pid=PSUD5XZ4ZJ5YPGBU&icmpid=reco_pp_personalhistoryFooter_psu_1_nr

    Thanks ..


    ko888 said:
    The Corsair Builder Series VS450 (CP-9020009), with its combined +12 Volt continuous current rating of 30 Amps and with one 6-pin PCI Express supplementary power connector, is sufficient to power your system configuration with a single GeForce GTX 550 Ti.

    Rs. 2428 (Price inclusive of taxes)
    http://www.flipkart.com/corsair-vs450-450-watts-psu/p/itmdbfa3kaffmum3?pid=PSUDBF9ZBHSJVGJ8&ref=d3995e4f-ec5b-438e-a9bf-bbe83af622fc


    The Antec Basiq Series 450 Watts (VP450P), with its combined +12 Volt continuous current rating of 30 Amps and with one 6-pin PCI Express supplementary power connector, is sufficient to power your system configuration with a single GeForce GTX 550 Ti.

    Rs. 3005 (Prices inclusive of taxes)
    http://www.flipkart.com/antec-vp450-450-watts-psu/p/itmd5xz5xn9gpgtz?pid=PSUD5XZ4YTUBFJEZ&ref=cfb72227-1ec9-433a-b333-416e88dd7c40


    The Corsair Builder Series VS550 (CP-9020050-WW), with its combined +12 Volt continuous current rating of 42 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single GeForce GTX 550 Ti.

    Rs. 3278 (Prices inclusive of taxes)
    http://www.flipkart.com/corsair-vs550-80-plus-certified-550-watt-psu/p/itmdg36xx8yzgjrs?pid=PSUDG34775NHYDHK&ref=c04e5647-337f-45fe-86a0-256ad86b714b
  11. Best answer
    friendz101 said:
    Thank you so much for suggesting links of flipkart, since i m usually a flipkart buyer :bounce:

    Anyway, would you recommend this one :

    http://www.flipkart.com/corsair-cmpsu-430cxv2uk-430-watts-psu/p/itmd5xz5qs9mhqmq?pid=PSUD5XZ4ZJ5YPGBU&icmpid=reco_pp_personalhistoryFooter_psu_1_nr

    Thanks ..

    That model is now discontinued by Corsair. It also has a weaker +12 Volt rail than the new cheaper Corsair Builder Series VS450 (CP-9020009) that I recommended.
  12. ko888 said:
    That model is now discontinued by Corsair. It also has a weaker +12 Volt rail than the new cheaper Corsair Builder Series VS450 (CP-9020009) that I recommended.


    Thanks... would definitely buy it then... U r awesome..
    Thanks everyone for their inputs on this .... :)
  13. Best answer selected by friendz101.
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