Topic: [Antminer S1 Sales open] Price changes daily, now 0.414 BTC for 180GH/s - page 135. (Read 346286 times)

Watching.

M

sorry i did not mean to turn this into some all out argument over psu's.. buy whatever psu. the math was top of head stab at it. u can go read again do ur own math. i have a few other tricks to decrease heat and increase efficiency we can argue about sometime if u want ?? personally i think need to eat the cost of psu's instead of calculating it into roi.

I never said is wasn't, I just disputed how you went about that. I just have a bit of a pet peeve with people using math to justify the wrong conclusions, and your numbers were wrong since you started with the extremely incorrect idea that the CX600 was 80% efficient. Almost nothing made these days is only 80% efficient from 50-80% load, unless you're talking about the generic grey ones that will come in a $40 case.

I'd disagree that selling the RM1000 for close to full price ($200) would be easier, even to other miners. The number of PC users who are running three GTX780s and an OC'd processor and actually need 1000W is vanishingly small. Getting $50 for a CX600 is likely going to be a lot easier.
The biggest benefit to a single larger PSU is that they tend to be a single massive 12V rail with the minor rails run off that using DC/DC. Some of the smaller ones like the CX600 are group regulated, so they can have issues with crossloads like miners put on them. They're also more flexible; the CX600 could easily become limiting if you want to move up and now power a board that draws 700W. That, and it only uses one plug and the footprint is smaller, so you use less rack space.

Regardless, from strictly business point of view, it's going to take a long time to make up the extra you pay moving from something like a CX600 to an RM1000 based solely on power costs. The gap from silver to gold or gold to platinum is ever more unjustifiable.

You would earn a lot more support if you posted screenshots of your late order and shipping info.

i am using ONE pci-e cable per antminer and they are not warm at all, however my ants colony is in a 60 degree datacenter as well. with all power supplies there is a sweet spot which is about 3/4ths of the power rating which means two ants oced go well on an rm1000 and two non-oced ants go well on an rm850. once you push to the maximum on a psu then drops to about 80% efficiency. my pc builds are pretty much complete total overkill. i only put 1200 watt psu's into my pcs unless i know it is only going to run one video card then i will put in an 850 watt. we should be aiming for that 3/4ths power sweet spot on a psu.

1 i ordered took a month to get no refund on the price drop

The RM1000 is overkill for 90% of the standard PC builds out there, not to mention the efficiency drops like a rock the higher you go.

There are other reasons why one might not consider the RM1000 to be ideal as well, but I agree that it seems to be a good unit (and I like the rounded corners).

On another note, for those of you running the RM1000 with overclocked ants, how warm do the wires/connectors get at the PSU end?  I have 2 on an XFX Pro1000 Platinum and the connectors are noticeably warm to the touch.  They aren't even overclocked.

i have 3 and want more
they shafted me real good
and cant do business with them till they make it wright.

Bitmain is one of the best, and still improving. I have purchased well over 30 units from different orders, and they all got here. Yes, slight kinks here or there, but nothing major, and no complaints on my part.
Bitmaintech, bring on the S2, we're ready!!

Bitmain is the most straightforward Asic Miner manufacturer there is.
THEY ALWAYS DELIVER!!!

And best part is: NO PRE-ORDERS.

Whoever calls Bitmain a scammer I call them a bullshitter.

I have ordered quite a few miners from Bitmain and ALL of them arrived in excellent condition so far.

rm1000 will be better psu in long term for future miners or will be better suited for use in a pc. you could sell them easier i think if you had to sell some of your psu's. i think rm1000 is the best choice for miner psu.

i ran some tests on a ax1200i platinum psu i had and i ended up putting that psu into my sons new uber pc i built him.. it will work well to power his video cards .. after all my testing i now only use rm1000's for mining. however you could run two non-oced ants ( i have not tested two oced ants on them yet ) on an rm850 although u might have to find an additional pci-e cable for it since it ships with only three.. i have so many psu's now that i have plenty of pci-e cables to go around. to answer your question i am not sure. how much power are the two oced ants pulling through the ax1200 ?? you can test it. i think ax1200 will shut down if it draws too much. i popped another brand psu one time drawing to much power from it . you will understand why i used the term 'popped' when/if it ever happens lol.

Competitors getting nervous?

Hey FastShit Community Liaison is this one of your new spam account?

bitmaintech and sushi are two different sites.

bitmaintech is not a scam

I think most people are more concerned with cable heating and voltage drop than the ability of the PSU to run it. Most PSUs run 18 gauge (@ 6.4mOhm/ft) for their wiring, so if you have 2 ft of cable before the first plug and are pulling 10A on each wire you're looking at a 0.256V drop just across the cable, and 7.7W spent just heating the cable.

Even running at 400MMHz isn't going to be an issue where it stops working with one cable to an Ant, but it's a little disconcerting to have your cable feel noticeably warm.

Generally good advice, but not necessarily true in all cases. If all you have are double cables, it may work anyway. It doesn't hurt to try; if the PSU can't handle it, its overcurrent protection will safely shut it down.

An ATX PSU is guaranteed to supply AT LEAST 300W on a double PCIe cable; that is the PCIe specification (150W per 8-pin connector). In practice, most will provide significantly more before current limiting kicks in.

Some examples of where double cables can work: I run 4 Ants on a Seasonic X-1250 using 4 double cables. And I run 4 Ants on an EVGA 1300 G2 using 4 double cables. These work fine. I am mildly underclocking these to 325MHz to stay within the 1250/1300W limit.

Except that the minimum for 80+ Bronze is 85% at 50% load, not 80%. That Bronze rated Corsair CX600 has been tested to run 350-400W at a bit over 87% efficiency, so for ~370W DC draw (what mine run at when set to 400MHz), that's 425W AC for the CX600@87% and 407W AC per Ant for the RM1000@91%. That's a savings of 18W per unit, or 36W together. For me at ~$0.15/kWh, or a savings of a little under $4 per month for two Ants.

I'd probably still go with the RM1000 just because it looks like a really nice supply and it's not group regulated, but it's a long payoff for that vs two CX600's if the price difference is $100.

Yup makes sense.

One thing worth nothing is that you need avoid running an entire antminer from "double" pci-e cables with 2 connectors, max one blade/cable.

Thanks guys