Does anyone know if it is OK to connect 2 of my modules from Jupiter 1 to Jupiter 2. I will move just the ribbon data cables over, so Jupiter 2 has 6 modules connected to it, but 2 of these are still powered by Jupiter 1 PSU.
Anyone? I am sure you'll eventually try it, so let us know how it goes! I am suprised you have a board that actually supports 6 connections, my day 1 jup only has 4. I just did. 6 boards using all 6 connection, using 1 V850 PSU. |
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Does anyone know if it is OK to connect 2 of my modules from Jupiter 1 to Jupiter 2. I will move just the ribbon data cables over, so Jupiter 2 has 6 modules connected to it, but 2 of these are still powered by Jupiter 1 PSU.
Anyone? |
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Does anyone know if it is OK to connect 2 of my modules from Jupiter 1 to Jupiter 2. I will move just the ribbon data cables over, so Jupiter 2 has 6 modules connected to it, but 2 of these are still powered by Jupiter 1 PSU.
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Exactly, which meant that 850W PSU's were put into an over-spec situation Nope. Power supplies are rated on output. At best efficiency would be 90% at high end of the curve. So 900W/0.9 = 810W. Overspec would be 850/0.9= 944W AC. And I highly doubt that 850W DC is its maximum anyway. This review has tested it up to 110% load (934.00W DC / 1032.15W AC) and efficiancy was pretty spectacular: 90.49% http://www.techpowerup.com/reviews/CoolerMaster/V850/5.html |
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So in answer to CYPER's question...hell yes, it was a bad recommendation. I'm glad I got a 1000W which accounted for KnC's screw-up in power estimation. Granted, later firmware has rendered the issue moot..but for the initial release it was a swing-and-a-miss by KnC on that 850W recommendation for sure.
900W AC power is within spec of V850  Even 950W AC will be within spec on 240V |
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haveing few 100s wats spare cant do harm ro you power price. Besacuse miner only uses how much it needs
Really? So then I buy 100W PSU and save electricity  |
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For a KNC Jupiter it could well end up drawing 750 Watts (perhaps a bit more) -- I would recommend a 1000 Watt supply as the minimum.
It would be better with a 1200 Watt capable supply. (Safety margin)
Most engineers like lots of safety margin. In this case the extra cost is cheap insurance.
You think KNC engineers have made the wrong recommendations with 850W PSU? |
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For the Psu-s
I have a question. If you have a machine what eats about 700w and you have a 850w Psu, what will you do if somhow we can overclock them and need some margin?
I have a 1500w psu and a lot of big fans to answer this.
But it's only a theory......
A 850W quality PSU will most probably be enough even for some overclocking if possible, granted a Jupiter uses less than 600W DC power. And you'll have a psu at 100% load. Personally I don't like it. (It's my fault) You just assumed that any future overclock will require additional 250W? Maybe If that is the case I can always buy another PSU and use it together with what I have. There is no restrcitions on how many PSU you can use with a single miner as long as it is more than 1 I have 2 Jupiters each on a CM V850, so if any need arises I can just get a 3rd one and use it for both Jupiters. The power requirements are quite flexible. |
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For the Psu-s
I have a question. If you have a machine what eats about 700w and you have a 850w Psu, what will you do if somhow we can overclock them and need some margin?
I have a 1500w psu and a lot of big fans to answer this.
But it's only a theory......
A 850W quality PSU will most probably be enough even for some overclocking if possible, granted a Jupiter uses less than 600W DC power. |
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You are mistaken. Highest efficiency is at 50% load. I assure you 80% is correct. You may read many reviews of X number of PSUs and you will get a picture that PSUs are most efficient between 50 -70%. The problem is that these review sites rarely if ever leave the PSU running for 3 or 4 hours. If you are lucky enough to find a psu review that does test after a long period of time you will see that 80% is the sweet spot on most modern & high quality PSUs. If you can send me a link that proves otherwise i would love to read it.
At one time the efficiency curve was very "curvy" but those days have been gone for a long time. Today the efficiency curve is very flat the difference between 50% load and 80% load is usually 1% to 2%.
So buying a super sized power supply to run it at 50% load would save you a whole 1% * 600W * 24 * 365 / 1000 = 52 kWh. At $0.10 electrical rate the savings would be a staggering $5.20 a year. Now if you spend $100 more for this larger "have to run at 50% load because some article in 1998 said that" power supply your break even point is roughly 18 years of continual usage.
There is still big difference in efficiency between makes and models ranging from less than 80% to as high as 93%. My suggestion to anyone is to buy a good quality PSU that has enough wattage to run the miner at 80% usage = less additional noise and heat from the PSU. And it is not money down the drain, because these products tend to depreciate very slowly and if you buy a good quality one you can expect to sell it for 80% of its price later when you don't need it. |
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You are mistaken. Highest efficiency is at 50% load. |
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butterfly monarch is better have 600 Ghs is more cheap
yeah, this is very good product, you should buy, you be happy, good boy. |
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Jupiters, which is about 150% more hashpower than I currently have...IF they are still 550GH/s devices...
which I'm sure they won't be. What do you mean by that? |
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Wow, I really hope that is no true, because I was contemplating of sending my boards back. It is a good advice to mark them though. |
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To me, it looks like possibly a lot of accounts that had "collected dust" (small payments from faucets and free µBTC sites) and were transferred to a single address.
Yeah but who decided to pay so much fees? And why? |
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By the end of this month - mid December, Jupiters are going to be earning - what? 0.1 BTC a day? 10 days per bitcoin?
If you think that the network hashrate will be 20PH/s by end of the month you are delusional. |
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Does the RJ45 cables come with the saturn?
NO. |
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in future is possible use jupiter or saturn for litecoin?
NO. |
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Yes, that is a very good PSU with high efficiency. Btw KNC warned not to use HX850 as it supplies too much current and it can kill your miner, but I think AX850 is a safe choice. Do you have it or you plan on buying it? If I were you I will get the recommended by KNC: Coolermaster V850. I got 2 and they are good. I plane to buy. What do you recommend for the saturn? Thanks for your help Just 1? Sorry, i wanted to say *Jupiter Yea, it seems that i will jump in Jupiter, maybe order 3 or 4 of them. For the Jupiter, would this be enough: http://www.corsair.com/pt/professional-series-gold-ax1200-80-plus-gold-certified-fully-modular-power-supply.html/ ? Even half of that will probably work, not that I recommend to run the PSU at max. Get a 800/850W to save some money or if you want get the 1200W. |
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Yes, that is a very good PSU with high efficiency. Btw KNC warned not to use HX850 as it supplies too much current and it can kill your miner, but I think AX850 is a safe choice. Do you have it or you plan on buying it? If I were you I will get the recommended by KNC: Coolermaster V850. I got 2 and they are good. I plane to buy. What do you recommend for the saturn? Thanks for your help Just 1? |
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