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Title: PSU 1100w+850w Post by: ubuntucg on February 24, 2014, 07:04:40 AM Hello,I have 3 r9 280x toxic sapphire and 1 msi 7990 ,i need help how to use 2 psu that i could run without issues,my problem:
1)if i run 3 r9 280x on 1100w I get problem system shut downs kill-a-wat shows 1050-1075w i think not enough power 2)if i run 2 r9 280x on 1100w psu and 1 on 850w its ok kill-a-watt says that im use 400-425w for 1 card from 850w psu 3)so 7990 it use much more power than r9 280x i didnt check but i think so,my second psu 850w it turns off system when it reach about 800w usage so i cant use this psu to feed 7990 and on 1st psu there usage is about 820w ,so i have 200w fron 1st and 350w from 2nd psu free how can i manage them how i could make my all cards runing?Is there a way that if 1 psu doesnt have enough power it will draw from another?Any ideas? Title: Re: PSU 1100w+850w Post by: -droid- on February 24, 2014, 07:07:56 AM undervolt, undervolt, undervolt
Title: Re: PSU 1100w+850w Post by: NameTaken on February 24, 2014, 07:14:39 AM Kill A Watt measures the AC power draw from the wall which is 15% more assuming your PSU is 85% efficient then the DC your PSU is providing.
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