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Thread: Seasonic X-850 on Ryzen 3900

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    Default Seasonic X-850 on Ryzen 3900

    Hi everyone

    I am in the process of building a new PC, and am harvesting pieces from my old PC including this Seasonic X-850 that I have enjoyed for years.

    I just got my new motherboard (Gigabyte Aorus Master X570) and CPU (3900X) and I'm noticing on the motherboard that there are 2 8-pin power connectors for the CPU (ATX_12V/ATX_12V1).

    My power supply only has one 'CPU' 8 pin output, and I am concerned that trying to connect another 8 pin say to the 'PCI-E' section of the power supply and running that to the ATX 12V part would not work.

    I do intend to overclock the CPU and memory (32GB of 3600) and do not want my power supply to limit me. My GPU is a 1070 but will eventually become a 3080Ti or equivalent when released.

    I'm not too savvy regarding '12V Rails' though I have been a long time fan of this site and the reviews posted here. I'm not keen to get rid of this PSU but if the build I'm going for outstrips this PSU's capabilities could you please let me know? If you have any solutions to suggest I'd be grateful to hear them too.

    Thanks.

    EDIT: What the motherboard manual shows (my previous motherboard was a p67a-ud7 with a 2600k Sandy Bridge so it has been a while...)




    And what the back of my PSU looks like:

    Last edited by Aristotelian; 12-18-2019 at 02:56 PM.

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    Default

    The second EPS connector is optional and only needed for heavy overclocking and a high power consumption.

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    Isn't the MB manual available as a downloadable pdf file? No need to scan such a thing.
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    850W would do just fine for this system, but if you later go with a more power hungry GPU and you want to OC the crap out of everything, then 1000~1200W. But anything above that dont make KrogerFeedback any sense.
    And AIOs (closed loop) are quiet nice. Im using one from Corsair also. But to get something that would make a real difference you must go 100++$$.
    Last edited by lekneini; 12-21-2019 at 09:09 AM. Reason: Spelling

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    Quote Originally Posted by lekneini View Post
    850W would do just fine for this system, but if you later go with a more power hungry GPU and you want to OC the crap out of everything, then 1000~1200W.
    no he doesnt need to , any possible single gpu setup even with extreme overclocking his psu would still have significant headroom
    CPU: i7 9700K / Motherboard: Gigabyte z390 Aorus Pro Wifi
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    Quote Originally Posted by -The_Mask- View Post
    The second EPS connector is optional and only needed for heavy overclocking and a high power consumption.
    LN2 pot territory even the 9900K on THW's test at 250W load (Prime95 small FFTs 5.0 ghz) throttled on a water chiller.

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    Quote Originally Posted by lekneini View Post
    850W would do just fine for this system, but if you later go with a more power hungry GPU and you want to OC the crap out of everything, then 1000~1200W. But anything above that dont make any sense.
    I think you would get quite a kick if you measured your system's actual power consumption with something like Kill a watt, instead of guessing.

    Because a 3900X and 1070, overclocked will consume around 250-300W (probably even less) with EVERYTHING under full load and oc.. ;D

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    Quote Originally Posted by hello_there_123 View Post
    LN2 pot territory even the 9900K on THW's test at 250W load (Prime95 small FFTs 5.0 ghz) throttled on a water chiller.
    they just did that to be on the safe side but your 8 pin eps connector will supply you with up to 430 watts of power to be safe you shouldnt exceed 336 watts
    CPU: i7 9700K / Motherboard: Gigabyte z390 Aorus Pro Wifi
    RAM: 2 x Ballistix 8GB DDR4 @3000MHz GPU: ASUS ROG STRIX RTX 2070 Advanced
    SSD: ADATA XPG SX8200 Pro 1TB NVMe / HDD: 3TB WD 30EZRX
    PSU: Corsair RM850i -850w Gold / CPU Cooler: bequiet! Dark Rock Pro 4
    PC Case: CoolerMaster H500P Mesh White /Monitor : Samsung Professional monitor S27B970D
    DAC: Audioengine D1 /Speakers : Focal Bird 2.1 / Headphones: Sennheiser HD 380Pro / B&W PX

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