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CX 430 7870 Question

I have notice that the 7870 am getting requires 2 x 6 PCI-E connector but my power supply only has 1 x 6+2 pi PCI-E connector.

I was thinking of getting molex LP4 to 6 Pin PCI Express and use this plus the 6 pin from my PSU to power the card, would this work?

http://www.amazon.com/StarTech-com-6-Inch-Express-Adapter-LP4PCIEXADAP/dp/B0007RXDDM/ref=lh_ni_t?ie=UTF8&psc=1
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  1. Best answer
    ifreestylin said:
    I have notice that the 7870 am getting requires 2 x 6 PCI-E connector but my power supply only has 1 x 6+2 pi PCI-E connector.

    I was thinking of getting molex LP4 to 6 Pin PCI Express and use this plus the 6 pin from my PSU to power the card, would this work?

    http://www.amazon.com/StarTech-com-6-Inch-Express-Adapter-LP4PCIEXADAP/dp/B0007RXDDM/ref=lh_ni_t?ie=UTF8&psc=1


    Yes, it will work. One thing to be aware of: realhardtech(and amd) suggests a 500w psu
    for a sys with a 7870. Your cx430 does have 32a(which is good) on the +12v rail(s), so you
    should be OK. You prob don't want to OC tho.

    Tom

    Also, some gpu's include a molex/pci-e adapter for this purpose.
    You may not need to purch one.
  2. ifreestylin said:


    No - you need the 1st one you linked, a molex to pci-e.

    Tom
  3. The CX430 is not rated 80 plus so you are not going to get even close to 80% of the total power, more likely only about 375 watts which will cause a power surge to all hardware and possibly blow your videocard if not everything else.

    I'd suggest at least 650 watts so that you are not running at peak power continuously and get one with two of the connectors.

    ■500W (or greater) power supply with two 75W 6-pin PCI Express power connectors recommended
    http://www.amd.com/us/products/desktop/graphics/7000/7950/Pages/radeon-7950.aspx#/2
  4. toyftw said:
    No - you need the 1st one you linked, a molex to pci-e.

    Tom



    Ok thanks
  5. first off...frankly speaking a power supply only provides as many cables as it can power best.

    any modification generally should be avoided as far as possible.

    even though your psu should be able to power the 7870,you should surely consider upgrading to a 500w one if you can.

    extremeoutervision psu calculator should give you a better idea of your psu wattage requirements
  6. siddharthmukul007 said:
    first off...frankly speaking a power supply only provides as many cables as it can power best.

    any modification generally should be avoided as far as possible.

    even though your psu should be able to power the 7870,you should surely consider upgrading to a 500w one if you can.

    extremeoutervision psu calculator should give you a better idea of your psu wattage requirements



    I already check it out at i got 364 at peak which am not gonna be anyways
  7. well the cx series is the lowest end psu from corsair....they are 80 plus for sure but are not certified.
    80 plus is what only corsair themselves claim.

    would you want to risk all of your expensive hardware for just a couple of dollars on your psu?

    choice is yours...

    take care
  8. TenPc said:
    The CX430 is not rated 80 plus so you are not going to get even close to 80% of the total power, more likely only about 375 watts which will cause a power surge to all hardware and possibly blow your videocard if not everything else.

    I'd suggest at least 650 watts so that you are not running at peak power continuously and get one with two of the connectors.

    ■500W (or greater) power supply with two 75W 6-pin PCI Express power connectors recommended
    http://www.amd.com/us/products/desktop/graphics/7000/7950/Pages/radeon-7950.aspx#/2


    ifreestylin knows rec pwr, I listed it above.
    I listed realhardtechs(their expertise) suggested 500w,
    but, he has enough +12v amps and can run the sys.
    AMD & NVidia overstate req to allow for psu's that lie
    about their specs and older psu's that may be weak on
    the +12v rail(s)

    the 80 plus rating has nothing to do with the the DC power
    the psu delivers to the components
    . It does influence how
    much power gets pulled from the wall. So, yes a less efficient
    psu needs more from the wall.

    But, that's not the PSU's power rating.

    That PSU can deliver it's rated power(430w tot) and deliver 384w on
    the 12v rails, for a sys that will draw approx 275w total during use.

    There will be no power surge, and he needs no where near 650w.
  9. I will upgrade but not right now
  10. good luck with that...hope you don't oc your 6300.
  11. lol its already overclocked but am a go back to stock, any PSU suggestions?
  12. ifreestylin said:
    I will upgrade but not right now


    Hi again - Please list the exact model # of your cx430 tho.
    I have assumed you are using a newer cx430 (with the 32a +12v)
    , but the older discntd models have only 28a. That makes a big
    difference. So, plz post so I can determine which flavor you have.

    Tom
  13. well if you want to stick to corsair go for the gs or the tx series.

    seasonic,rosewill,xfx,antec all of them makes great psu s
  14. ifreestylin said:
    lol its already overclocked but am a go back to stock, any PSU suggestions?


    If you are going to upgrade psu now and are only going to use one gpu
    (no CF) then a quality 500- 550w unit will work fine.

    Quality brands: Seasonic, XFX, PC Power & Cooling, Antec,
    Rosewill Capstone series, most Corsairs, most OCZ, & a
    few others.
  15. toyftw said:
    Hi again - Please list the exact model # of your cx430 tho.
    I have assumed you are using a newer cx430 (with the 32a +12v)
    , but the older discntd models have only 28a. That makes a big
    difference. So, plz post so I can determine which flavor you have.

    Tom


    I got it from here
    http://www.amazon.com/gp/product/B0092ML1SC/ref=oh_details_o06_s03_i00
  16. ifreestylin said:


    If that is the exact model you purch, then that is good news,
    as that model has the 32amps on the +12v rail.
    So, you can use your 7870 til you upgrade psu.
  17. toyftw said:
    If that is the exact model you purch, then that is good news,
    as that model has the 32amps on the +12v rail.
    So, you can use your 7870 til you upgrade psu.


    Ok thanks i will upgrade but cant right now already order the card, which of the PCI-E adapter is better?
  18. ifreestylin said:
    Ok thanks i will upgrade but cant right now already order card, which of the PCI-E adapter is better?


    the 1st one you linked startech

    StarTech.com 6-Inch LP4 to 6 Pin PCI Express Video Card Power Cable Adapter (LP4PCIEXADAP)

    is fine
  19. toyftw said:
    the 1st one you linked startech

    StarTech.com 6-Inch LP4 to 6 Pin PCI Express Video Card Power Cable Adapter (LP4PCIEXADAP)

    is fine


    is it gonna be using two 4 pin molex? not that is a problem
  20. TenPc said:
    The CX430 is not rated 80 plus so you are not going to get even close to 80% of the total power, more likely only about 375 watts which will cause a power surge to all hardware and possibly blow your videocard if not everything else.

    I'd suggest at least 650 watts so that you are not running at peak power continuously and get one with two of the connectors.

    ■500W (or greater) power supply with two 75W 6-pin PCI Express power connectors recommended
    http://www.amd.com/us/products/desktop/graphics/7000/7950/Pages/radeon-7950.aspx#/2


    You have no idea what you are talking about

    80+ ratings have nothing to do with the power outputted, it's the amount of power that needs to be drawn from the wall to produce the spec'd power output, for instance an 80+ 500W PSU will draw at most 625(disregarding EPS and misc. Rail voltages) watts from the wall socket to produce the 500W peak, and at lower loads it will draw less, the only thing 80+ factors into is your monthly power bill, and heat generation(less power from wall socket=less heat), it has NOTHING to do with the amount of power produced. Also the CX430 is Bronze 80+. Meaning up to 85% efficiency, meaning at most It'll draw maybe 550 watts from the wall.

    Besides it's the amps that really matter, 32 should be enough for a single 7870, it's definitely not ideal but it should work.
  21. ifreestylin said:
    is it gonna be using two 4 pin molex? not that is a problem


    not a problem, it has two molex connectors,
    you'll only use one
  22. Ok thanks guys
  23. ifreestylin said:
    Ok thanks guys


    good luck with your rig
  24. Best answer selected by iFreeStylin.
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