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Thread: CX 400 and 4870X2

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    Default CX 400 and 4870X2

    Hi all, I've been a lurker for a few years now, gaining knowledge from the reviews and forums posts and can say I've never seen anyone with such PSU knowledge. So I had to come to the experts for a quick question. My current GTX 470 has to be RMAd and in the meantime the only GPU I have available to use in the machine is a 4870X2. Would the PSU suffice for a couple weeks using the 4870X2 and if it did would I turn one of the GPUs off in CCC. I know the seasonic built CX400 is a decent PSU for what it's worth, but they didn't include an 8pin PCIe connector for a reason. I rarely game on the system so it would mainly be at idle power draw. Here are the current system specs.

    AMD X2 4850e 45W TDP
    4G( 2x2GB) 1.8V DDR2 800
    1 Case fan
    Foxconn 780V motherboard
    1 WD 320GB SE16 HD
    EVGA GTX 470

    Room temps are never above 70F and psu is cleaned regularly. Thanks for the advice!

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    Default

    fwiw, from the very inexperienced, looking at a couple web site reviews, an HD 4870X2 maxes about 265 watts. Total system power (from the wall) running 125 watt CPUs was measured about 450-500 watt. 80% of 500 is 400.
    With your 80 watt cushion should work.
    CX400 maxes out about 360 watts on the 12 volt. One 6 pin connector for video cards mean an adapter for the 8 pin (your card takes a 6 and an 8? Power supply uses 2 rails which could be a problem.

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    You'll be fine just need a little adapter for the 8 pin PCI e power

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    GF6200 (12-04-2013)

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    Default

    fwiw, from the very inexperienced, looking at a couple web site reviews, an HD 4870X2 maxes about 265 watts.
    In Furmark, I've seen it max at well over 300W. It was either on TPU or xbitlabs.

    and if it did would I turn one of the GPUs off in CCC.
    Then it would be around the same as 4870, around 150-160W max.

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    GF6200 (12-04-2013)

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    Default

    Thanks for the replies. Hoped it would work fine at idle, i'll keep a check on case temps so it doesn't get too toasty. http://www.frozencpu.com/products/16...l?tl=g2c38s427
    I will be getting that adapter as it is the simplest solution, trying to avoid multiple connectors as to not have too much voltage drop. On a side note, I'v checked out some new of Corsair's CX line (Had HX650 on previous machine) and it seems like they are decent but have some cheaper components. Looks like the next machine will get the ax line.

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    Default

    Thanks for the help everyone. Got the Modright 2 4pin Molex to 8PIN adapter in today and it works great. So far no heat or noise change from the psu. Tough PSU this is..

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    Default

    Thank you for following up on result.
    Best I am aware, CX400 has headroom and bench tests draw more than real world use.
    Sounds like one or both apply.

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    No problem. Like to spread the knowledge. I mined some litecoins on the 4870X2, which is a heavy load and the fan increased right away on the CX400 but wasn't that hot of exhaust air. Case side panel was off and ambient room temp was 65F. Mined for around 12 hours straight and no hiccups. 4870X2 replacement should be here as AMD does not provide support for the HD4XXX series and lower cards, thus no 8.1 drivers, so everything is terrible now. But PSU still going strong.

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    Well I now have an EVGA GTX 660. CX400 did great with briefly handling the 4870X2, at mainly idle loads. Now I don't have to use an adapter which is nicer/cleaner. Thanks for the help everyone.

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    Sorry for the bump guys, just have another question regarding this little beast. I'm thinking the PSU will be fine for this setup, ambient temp room 70F, however other forum users say not. What do the experts think? Also CPU regularly cleaned, no pets, smoke free environment.

    AMD FX 4130 (125wTDP)
    XFX R9 380 XXX 4GB
    8GB SuperTalent DDR3
    1 SSD
    1 7200 HD
    3 120MM fans
    2 USB devices

    Thanks all

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