Power supply issues for a new graphics card

Okay guys. I've been thinking of buying a MSI Radeon 7770 1 GB to replace my crappy Sapphire 4670 HD 1 GB. My power supply is 400 W. Is it enough for the 7770? And do I need an external power supply? How do I get that? What is a 6 pin connector? Do I have to buy a new PSU? I really need help.
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  1. Yes dude you need good power supply for hd 7770.you will also need 6pin connector to power on gpu.
  2. Ashish65 is right.
  3. So I'll have to get a new PSU. Alright. But will it have the 6 pin connector or it has to be bought separately? And is 550W enough?
  4. A PSU from a "good" Company will usualy list (Or show images) of the connectors it provides. For a GPU, Watts available on the +12V rail(s) And AMP rating matter most.

    If your not sure about power either

    1. If your PSU is from a OEM (Such as DELL, HP, Gateway etc.) Open the side of the case, Take a picture of the PSU tag, Upload that photo to Photobucket and post the link here
    2. If you bought it, then Link the store page
  5. simmons33 said:
    A PSU from a "good" Company will usualy list (Or show images) of the connectors it provides. For a GPU, Watts available on the +12V rail(s) And AMP rating matter most.

    If your not sure about power either

    1. If your PSU is from a OEM (Such as DELL, HP, Gateway etc.) Open the side of the case, Take a picture of the PSU tag, Upload that photo to Photobucket and post the link here
    2. If you bought it, then Link the store page


    This is the one I have. I really doubt it has a 6 pin connector.
    http://www.theitdepot.com/details-I+Ball+400W+Power+Supply_C14P836.html


    I'm thinking of buying this but not sure if it has a 6 pin connector. Can you please tell me?
    http://www.flipkart.com/corsair-vs550-550-watt-psu/p/itmdg36xx8yzgjrs?pid=PSUDG34775NHYDHK&ref=59e664d5-4fe8-47ca-980b-135bc6be2df6&srno=t_10&otracker=from-search&query=psu
  6. Your actual power supply is not good for a HD 7770, which needs at least a 500W power supply with one 75W 6-pin PCI Express power connector.

    I recommend you to get Seasonic S12II 520 Watts PSU http://www.flipkart.com/seasonic-s12ii-520-watts-psu/p/itmd5xz5hzvzt9cx?pid=PSUD5XZ4KFH65H9E&ref=b20afbf6-0949-4f99-aa7f-6cdaaeea62c7
  7. gauravsahay123 said:

    it has two 8 pin PCI power connections, which is fine:
    http://www.realhardtechx.com/index_archivos/Page447.htm

    btw, what cpu do you have?
  8. Anonymous said:
    it has two 8 pin PCI power connections, which is fine:
    http://www.realhardtechx.com/index_archivos/Page447.htm

    btw, what cpu do you have?


    AMD Athlon 2 X2 245
  9. jemm said:
    Your actual power supply is not good for a HD 7770, which needs at least a 500W power supply with one 75W 6-pin PCI Express power connector.

    I recommend you to get Seasonic S12II 520 Watts PSU http://www.flipkart.com/seasonic-s12ii-520-watts-psu/p/itmd5xz5hzvzt9cx?pid=PSUD5XZ4KFH65H9E&ref=b20afbf6-0949-4f99-aa7f-6cdaaeea62c7


    Thanks. But is there anything cheaper I can get? Otherwise I'll have less money left for my graphics card
  10. dude buy this psu- http://www.flipkart.com/corsair-cmpsu-430cxv2uk-430-watts-psu/p/itmd5xz5qs9mhqmq

    it has 28a on 12rail =336w.which is more than enough as hd 7770 has tdp of 80w.
  11. oh..buddy u really need to buy a new psu atleast 650 w..I'd recommend to buy Cooler master or corsair because all the others r crap...
    & about the 6pin connector it is with all major 450 watt+ psus ...you've to connect them to ur card.. a 6 pin connector is like it this pic.
    http://images.anandtech.com/reviews/shows/computex/2004/nv45final/connector.jpg
  12. Cooler Master is not famous for its PSUs.
  13. gauravsahay123 said:
    AMD Athlon 2 X2 245

    that is a 65 watt CPU and depending on the model of 7770 that could add up to ~85 watts for 150 watts. include 5 watts for a hard drive, ~15 watts for the chipset and 5 watts for any case fan and your still below 200 watts on the 12 volt rail.

    keep that under 80% load; 200/.8 = 250 watts of 12 volts.

    the corsair CX430 would be quite fine for Rs. 2703.

    keep in mind, if you want to upgrade the CPU to a 125 watts, that iwll be cutting it close, it will work but will be close.
    260/.8= 325 watts and that has 336 (and i am keeping the load under 80% of max)
  14. Anonymous said:
    that is a 65 watt CPU and depending on the model of 7770 that could add up to ~85 watts for 150 watts. include 5 watts for a hard drive, ~15 watts for the chipset and 5 watts for any case fan and your still below 200 watts on the 12 volt rail.

    keep that under 80% load; 200/.8 = 250 watts of 12 volts.

    the corsair CX430 would be quite fine for Rs. 2703.

    keep in mind, if you want to upgrade the CPU to a 125 watts, that iwll be cutting it close, it will work but will be close.
    260/.8= 325 watts and that has 336 (and i am keeping the load under 80% of max)


    How about a 550W PSU? I'll probably crossfire my 7770 in the future. Will it be enough?
  15. Nope, for 2x HD 7770 you need at least 600W power supply with two 75W 6-pin PCI Express power connectors http://www.flipkart.com/corsair-cmpsu-600cxv2uk-600-watts-psu/p/itmd5xz4qhbpvvzk?pid=PSUD5XZ4EFXTQNG7&ref=47ba0920-b68f-4792-8ef1-5b463948d03c
  16. gauravsahay123 said:
    How about a 550W PSU? I'll probably crossfire my 7770 in the future. Will it be enough?

    i would highly recommend NOT to crossfire two entry level GPUs; its better to a better single card. also that AMD Athlon 2 X2 245 will limit it.

    if you are asking about that corsair VS550, to be honest at the moment i am not comfortable recommending those. i suggested a VS450 to someone to find out it is based off of a cheap rocketfish design and they have problems with it; the ran doesn't spin and they need to drive 4 hours to get it replaced.

    that is a new series from corsair for counties with only 220 volt input and though corsair have mostly quality PSUs sometimes they drop the ball. now that could have been just one time but i am waiting to see some reviews from a reputable site, like johnny guru, before i make any more suggestions for those.

    though that seasonic 520 is out of your budget, that would be a better choice with what i know at this moment.
  17. jemm said:
    Nope, for 2x HD 7770 you need at least 600W power supply with two 75W 6-pin PCI Express power connectors http://www.flipkart.com/corsair-cmpsu-600cxv2uk-600-watts-psu/p/itmd5xz4qhbpvvzk?pid=PSUD5XZ4EFXTQNG7&ref=47ba0920-b68f-4792-8ef1-5b463948d03c

    i have no idea where you get that a ~130 watt graphics set up needs a 600 watt PSU


    but it is not correct.
  18. Yes, you do have an idea, but nope I won´t post the chip manufacturer system requirements as you´d expect here, because it is what you want me to do, just to say that besides 2x HD 7770, the OP CPU, memory, HDD, etc, all together do not need 469W (600 - 131).

    I wonder why you didn´t post the correct wattage for the OP´s system -- instead you posted a huge and unnecessary card, with a lot of irrelevant stuff -- why on the hell the OP needs to know, for instance, that a GTX 590 uses 350W? Or that an HD 6990 needs 288W, and so on and forth?

    The only thing the OP needs to know is how much wattage it is needed to power 2x HD 7770, and the rest of the system, but you haven´t delivered the information, but shown expertise in tumulting!
  19. No no donot go for cooler master.go for corsair psus.
  20. Cooler Master makes excellent cpu coolers, computers cases, but not power supplies -- avoid getting them if you have the choice to get a better one like Antec, Corsair, or Seasonic.

    Corsair CMPSU-500CXV2UK 500 Watts PSU http://www.flipkart.com/corsair-cmpsu-500cxv2uk-500-watts-psu/p/itmd5xz45f8cnrhg?pid=PSUD5XZ4CEUXM4GH&ref=0a4bc543-1b18-4d99-9b59-71d372e14b81
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