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Title: Where's the Lower Power Hardware? Post by: MegaFall on March 21, 2015, 08:17:49 PM All of these advancements in ASICs are great and everything... but where are the lower speed, lower power consumption units? Why is there not a "half S5" or "half SP20"? 1152GH/s for 590 Watts is great... but why not take those same chips and put them in a smaller unit for 550GH/s for 295 Watts, and thus less heat generation?
Title: Re: Where's the Lower Power Hardware? Post by: philipma1957 on March 21, 2015, 08:31:05 PM shipping fees hurt the build's lets say a 600 gh unit. s-5.a . plus the frames and heat sinks stay the same cost the fan is the same cost. the pcb boards have less chips. so the savings is not 170 + 25 to ship for 575 gh
It may be more like 225+35 to ship for a ½ chip 575gh machine. the best you can hope for is bitmaintech ships a few 1000 chips to the country you live in and someone builds a new design. Sidehack and his team is doing that and it may work out. Title: Re: Where's the Lower Power Hardware? Post by: MegaFall on March 21, 2015, 08:39:36 PM shipping fees hurt the build's lets say a 600 gh unit. s-5.a . plus the frames and heat sinks stay the same cost the fan is the same cost. the pcb boards have less chips. so the savings is not 170 + 25 to ship for 575 gh It may be more like 225+35 to ship for a ½ chip 575gh machine. the best you can hope for is bitmaintech ships a few 1000 chips to the country you live in and someone builds a new design. Sidehack and his team is doing that and it may work out. I would pay upto 1.25x (i.e; ($340/2) * 1.25) more for something that used less power and put out less heat. So if it were $260 ($225+$35) like you said, that would be just barely above what I'd be willing to pay. I'd put up $245 (including shipping) for a half-S5. Edit: Out of curiosity, is it possible to power only half of a S5? Say just one board instead of both? Title: Re: Where's the Lower Power Hardware? Post by: Tupsu on March 21, 2015, 10:37:21 PM I would pay upto 1.25x (i.e; ($340/2) * 1.25) more for something that used less power and put out less heat. So if it were $260 ($225+$35) like you said, that would be just barely above what I'd be willing to pay. I'd put up $245 (including shipping) for a half-S5. Edit: Out of curiosity, is it possible to power only half of a S5? Say just one board instead of both? Yes. It is possible . 1,2, 3 or 4 boards with one S5 controller. From watercooled S5 http://www.perearstike.ee/C1/S5x3.jpg Title: Re: Where's the Lower Power Hardware? Post by: philipma1957 on March 21, 2015, 10:38:04 PM shipping fees hurt the build's lets say a 600 gh unit. s-5.a . plus the frames and heat sinks stay the same cost the fan is the same cost. the pcb boards have less chips. so the savings is not 170 + 25 to ship for 575 gh It may be more like 225+35 to ship for a ½ chip 575gh machine. the best you can hope for is bitmaintech ships a few 1000 chips to the country you live in and someone builds a new design. Sidehack and his team is doing that and it may work out. I would pay upto 1.25x (i.e; ($340/2) * 1.25) more for something that used less power and put out less heat. So if it were $260 ($225+$35) like you said, that would be just barely above what I'd be willing to pay. I'd put up $245 (including shipping) for a half-S5. Edit: Out of curiosity, is it possible to power only half of a S5? Say just one board instead of both? just set freq to 225 vs freq 350 stock. I have been able to set as low as freq 225 for testing purposes. the gear scales well always close to .51 watts a gh at freq 225 the gear will drop to under 750gh x .51 = 380 watts. I think it will go down to freq 200 which is under 350 watts Title: Re: Where's the Lower Power Hardware? Post by: J4bberwock on March 21, 2015, 10:44:01 PM you can also simply underclock it to reach the power consumption / heat dissipation you want.
more or less half the speed, half the watts if you don't touch voltage Edit: philipma1957 was faster. Title: Re: Where's the Lower Power Hardware? Post by: valkir on March 22, 2015, 01:38:45 AM Nice I was searching for this. Didnt know what was the minimum freq possible on S5.
So 225 is working. Nice will for sure do that for the summer! ;D Title: Re: Where's the Lower Power Hardware? Post by: philipma1957 on March 22, 2015, 03:12:39 AM Nice I was searching for this. Didnt know what was the minimum freq possible on S5. So 225 is working. Nice will for sure do that for the summer! ;D it offers lower . I never tested lower Title: Re: Where's the Lower Power Hardware? Post by: RadekG on March 22, 2015, 05:47:19 PM you can lower heat much more by adjusting your PSU to lower voltage. For example Fortrons have adjustable potentiometer accessible through fan hole without removing any screw. You can adjust down to 10.8V which reduces heat of S5 a lot.
Title: Re: Where's the Lower Power Hardware? Post by: notlist3d on March 22, 2015, 05:55:50 PM you can lower heat much more by adjusting your PSU to lower voltage. For example Fortrons have adjustable potentiometer accessible through fan hole without removing any screw. You can adjust down to 10.8V which reduces heat of S5 a lot. With summer coming looking into underclocking will make sense for some. Also look into good exhust with heat. Paying AC to mine adds quite a bit. With price low and it seems to be moving slow it could be just a bit till next gen chips. This is good for current miners with difficulty not skyrocketing. (This is just my opinion on this part) Title: Re: Where's the Lower Power Hardware? Post by: philipma1957 on March 22, 2015, 06:20:04 PM you can lower heat much more by adjusting your PSU to lower voltage. For example Fortrons have adjustable potentiometer accessible through fan hole without removing any screw. You can adjust down to 10.8V which reduces heat of S5 a lot. link to one please. thanksTitle: Re: Where's the Lower Power Hardware? Post by: charles2k on March 22, 2015, 08:50:22 PM you can lower heat much more by adjusting your PSU to lower voltage. For example Fortrons have adjustable potentiometer accessible through fan hole without removing any screw. You can adjust down to 10.8V which reduces heat of S5 a lot. I heard, that under 11V it is not stable. Which FSP Fortron do you mean? Raider or Aurum S/ Pro? Title: Re: Where's the Lower Power Hardware? Post by: philipma1957 on March 22, 2015, 08:55:30 PM you can lower heat much more by adjusting your PSU to lower voltage. For example Fortrons have adjustable potentiometer accessible through fan hole without removing any screw. You can adjust down to 10.8V which reduces heat of S5 a lot. I heard, that under 11V it is not stable. Which FSP Fortron do you mean? Raider or Aurum S/ Pro? I would like to know since I have used a few of them that are decent gear. Title: Re: Where's the Lower Power Hardware? Post by: RadekG on March 23, 2015, 06:06:30 PM you can lower heat much more by adjusting your PSU to lower voltage. For example Fortrons have adjustable potentiometer accessible through fan hole without removing any screw. You can adjust down to 10.8V which reduces heat of S5 a lot. link to one please. thanksI am currently using Fortron Raider series or low cost "raiders": I tried to find official link, I have black one, but should be the same: http://www.fsp-group.com.tw/index.php?do=proinfo&id=1667 I killed a lot of them during GPU times and found that there is no difference in power output between 600 and 750W. Voltage mod can be done almost on every more powerfull PSU, like Fortron EPSILON series, or a ton of other brands, but older PSU dislike rising voltage due to 5V and 3V3 rail OVP. |
