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Title: Would I be able to run a third card on my PSU? Post by: pekv2 on June 16, 2012, 05:18:42 PM I am mining on 2 5850's atm on my PSU.
Would my psu be able to handle a third 5850 at mining? This is my PSU. 60a rail, 750w (825W Peak). http://www.pcpower.com/power-supply/silencer-750-quad-black.html I am thinking in the future, I might add another 5850 if my psu could handle it. What do you guys think? Title: Re: Would I be able to run a third card on my PSU? Post by: crazyates on June 16, 2012, 05:37:12 PM Do you have a killawall? What's the draw from the wall with 2?
Also, are you undervolted? Undervolted 5850s only pull like 130W a piece, IIRC. So ya, you should be able to put a 3rd on there NP. Title: Re: Would I be able to run a third card on my PSU? Post by: pekv2 on June 16, 2012, 05:43:14 PM Do you have a killawall? What's the draw from the wall with 2? Also, are you undervolted? Undervolted 5850s only pull like 130W a piece, IIRC. So ya, you should be able to put a 3rd on there NP. I do not have a killawatt. One 5850 is 943/300 at 1.088v, the second 5850 is 1000/300 overvolted to 1.225v. I will look into a killawatt in coming months. Getting a third card isn't something I am going jump on right away, kinda play the wait game see how those bfl jalapenos pan out to be. Title: Re: Would I be able to run a third card on my PSU? Post by: Dargo on June 16, 2012, 06:14:20 PM Do you have a killawall? What's the draw from the wall with 2? Also, are you undervolted? Undervolted 5850s only pull like 130W a piece, IIRC. So ya, you should be able to put a 3rd on there NP. Well, it depends on how much you undervolt. At 0.95v, 5850s pull more like 90W. Title: Re: Would I be able to run a third card on my PSU? Post by: dropt on June 16, 2012, 10:16:30 PM One of my rigs has 3x 5850's, 920/450 (Core/Mem) Stock volts. 550W at the wall. I'd say you're going to be fine.
Title: Re: Would I be able to run a third card on my PSU? Post by: dreamwatcher on June 16, 2012, 11:17:17 PM One of my rigs has 3x 5850's, 920/450 (Core/Mem) Stock volts. 550W at the wall. I'd say you're going to be fine. I generally estimate 150w per 5850 (850-150-1.05 @ 352 MH) 50 watts for the MB 500 Watt total, 750W PSU would be fine. NICE single rail 12v power supply (I cant tell you how much time I have spent balancing multi rail 12V, on top of multiple power supplies) You can pick up a Kill a watt meter really cheap, I just picked one up today at Menards for $14.57, my first one was like $25.00 at Ace hardware. Title: Re: Would I be able to run a third card on my PSU? Post by: dropt on June 17, 2012, 04:47:52 AM One of my rigs has 3x 5850's, 920/450 (Core/Mem) Stock volts. 550W at the wall. I'd say you're going to be fine. I generally estimate 150w per 5850 (850-150-1.05 @ 352 MH) 50 watts for the MB 500 Watt total, 750W PSU would be fine. NICE single rail 12v power supply (I cant tell you how much time I have spent balancing multi rail 12V, on top of multiple power supplies) You can pick up a Kill a watt meter really cheap, I just picked one up today at Menards for $14.57, my first one was like $25.00 at Ace hardware. I hear ya. I refuse to waste my time on Multi-Rails. XFX and Corsair Single Rails all the way. Title: Re: Would I be able to run a third card on my PSU? Post by: pekv2 on June 17, 2012, 05:04:06 AM Kewl 8). Now I know for future reference.
Title: Re: Would I be able to run a third card on my PSU? Post by: superfastkyle on June 17, 2012, 05:20:08 AM you shouldnt even have a problem running 4 5830's with that power supply as long as its a dedicated miner, at the very least you can run 4 at the 1.088 volt setting they use about 150 at stock 1.163 so you would be much lower than that
Title: Re: Would I be able to run a third card on my PSU? Post by: ssateneth on June 17, 2012, 10:40:34 AM I'm running 2 5850 stock volt/1015 core, 1 5870 0.95v, and 2 5830 0.95v and I'm drawing 740W at the wall with a HALE90 (80plus gold). Assuming 87% efficiency, thats about 644W DC current, still plenty of headroom on my PSU.
Title: Re: Would I be able to run a third card on my PSU? Post by: pekv2 on June 17, 2012, 11:40:02 AM I'm running 2 5850 stock volt/1015 core, 1 5870 0.95v, and 2 5830 0.95v and I'm drawing 740W at the wall with a HALE90 (80plus gold). Assuming 87% efficiency, thats about 644W DC current, still plenty of headroom on my PSU. Wow, so basically, I could slap two more 5850's on my psu if not overvolted or overclocked. Even then a possibility a 5770. 5 cards all together, as my PSU is 825 peak. Title: Re: Would I be able to run a third card on my PSU? Post by: Dargo on June 17, 2012, 02:59:36 PM I have 5x 5850s @0.95v and pull 540 watts at the wall. 5850s are good for about 300-305 Mh/s at 0.95v.
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