Topic: My second ZEC + XMR+ ETH thread builds info links thoughts and photos. - page 48. (Read 147998 times)

What is the efficiency of your RX rigs?

I can get about 0.7 J/H for my 6XR9 390 rigs. They are very undervoltged.

They're all still profitable, but as much as I'd like. I pay my electricity at a rate of about 0,18$/KWh, so I can't run anything older than the last generation. An R9 380 brings me only about 18$ monthly after electricity has been paid, so not very interesting...

Yeah, I know - I still have a few older cards like the 3x R9 290 in my "big ETH rig" and the pair in another rig (I just swapped some cards around).

 Got both of my R9 280x in one rig now - THAT rig is much more profitable on ZEC hands down, as is the single HD 7870 rig I brought back up couple days back.
 Current projects are to get as many of my HD 7750 cards swapped over from MooWrapper to ZEC as I can (they're mostly in Windoze rigs) and get my other 7850 rig and my 7850 rig back up and running and Windozed....

Old cards are super ineffective in power consumption. On the other side, if you live in North Dakota - it is a big plus

 Still dependent on specific details, like what cards you're running and power cost.

 It looks like many of the older AMD cards are still quite a bit more profitable (HD 7870 hands down, R9 280x) while others have gotten back to more even.


 That's what the basket is all about - one coin bumps up on profitability, the others have folks move out to that one coin, and the profitability evens out.

That's very good news ! Sadly the great profitability of ZCash calmed down, so I now switched it off. I'll maybe just restart the RX 470 in some days.

Another problem with the server PSU is that you need some special adaptor to use it. They do not have low voltage output.

are you testing it ?

The problem with manual switching is it takes too long time to change from Eth to ZEC or ZCL for example , to earn enough to get a confirmed balance , to withdraw it to the exchange , to get it confirmed there , and then to sell.
Generally, price changed and you are too late to enjoy the profitability you expected when you switched.

Maybe with the NH multi algo we avoid this problem , as everything mined is directly paid to the best profitability.

But :
- do NH really pay fairly ? I saw many post with people being not sure to earn what they should.
- do the NH multi algo works well ? stable ? I tried few weeks ago and it get my system crash so I went back to claymore to not loose time.

Just got back from thanksgiving party and upgrade to claymore 8 seems like more hash and still pretty low power happy.

the latest v1.7.3.6 have now integrated Claymore Zcash miner v8 !!!

what this means is...... we have Claymore's magic miner running as long as Zacsh is profitable, AND when Zcash is not profitable anymore... NH miner will switch to next profitable algo..... sounds like we have a winner here.

yes 220v line is better than 110v for mining

here is a simple formula

power = current x volts

1000watts = 4.5454 amps x 220 volts

1000watts = 9.0909 amps x 110 volts

higher voltage is the secret ingredient to transfer electricity to hundreds of miles from the power plant by using hundreds of thousand volts, higher voltage is higher efficiency by having more watts for the wire.

regarding using server psu, i think it is better to use server psu because it is designed to work 24/7, typically they are rated in "platinum" and second hand server psu tends to be a lot cheaper. the only problem i see with second hand server psu's is if you get a unit that has been used for a very long period of time, no matter how great their build, they aren't designed to last forever plus they don't have warranty from the manufacturer anymore. (some server PSU's are very noisy btw )

using typical PC PSU has an advantage too because typically they are bought brand new, and good PSU's can have 5 year, 7 year and i think there are some with 10 year warranty..the only disadvantage is the price.

I think i read in this thread some place how it is better to use a 220 line over a 110 line that's the truth i just tested that to find out on my 110 line if the meter is right It uses 4.8 amp or 562 watts at the wall with 4 amd cards and CM8 i plugged it into a 220 line it dropped off a AMP or so ,right now i have no real way of proving it other then what the PDU shows in amps used on the 220 line from what the 110 line meter shows. I'm using a Vga 1300 gold and looking at using SIdehacks break outboards with  1500 watt pat server psu's on a 220 line. there cheaper.

Using Server PSU's Might be better the way ?.  



you can get a power color red dragon RX 480 4gb with Samsung memory that might unlock to 8gb at your own risk, for the same price they are good cards, I'm running one now and modded the bios for Zcash mining .

http://www.newegg.com/Product/Product.aspx?Item=N82E16814131706


I heard bad things about the MSI cards as well but not why i didn't buy one.



The power color cards are not cheap made cards like a few reviews were reporting so much for reviews and some others on the forums.


RX 480 any model do hash higher then 470 models that i have tried you have to tweak them which can take hours of trying to find that sweet spot and my founds are limited till next year paying off CC . then gonna pay cash for more cards and possible one or two A7 unless Side hack is able to get a good supply of btc miner chips .


cool using CM 8 been going good for a week  on 4 amd cards . using speed fan to control the fan speeds and found this post https://forum.z.cash/t/anoraks-vbios-collection-optimized-settings-for-performance-power-saving/8347


to help mode a bios no one has a mode for yet I did or edited the bios by reading a lot  because the cards is a new release .

Guys,

I just want to mention from my experience that I'm now mining for more then 4 days without any crash on my rig running 4 cards. I'm using Claymore parameter to control the all the clocks and MV instead of Wattman from AMD.

If that can help anyone ;-)

Interesting... i never noticed that Armor GPU before. Anyone actually used these in a mining rig?  I am wondering what the difference is between these and the MSI Gaming 4GB, which are what I have. 

http://www.newegg.com/Product/Product.aspx?Item=N82E16814137024

Seems like the Armor have slightly slower mem clock (6600 vs 6700) and consume 10w more power (120 vs 110), but wondering if there are any other differences that would affect mining efficiency.  Both Amazon and NewEgg have the gaming now at $193 - $15 rebate, so $178, which is the lowest I've seen.  Still, that Armor is $28 less.  The crappy thing is that MSI limits these rebates to 1 per model. But, I guess I could get 1 of each which would bring me up to 5 cards for my new rig and I would only need 1 more.  Waiting to see if there are any mega deals tomorrow.

I just bought W7 on Ebay and installed W10 using activation code

I've used this method to buy W7 and W10 off of ebay.  It works.  I sleep slightly better at night 

Yeah I have done a lot of four card builds .

If you use the biostar no back plates.

I know the 199 usd msi rx 470 has no back plate and fits on the biostar board.

I looked at the 169 used msi rx 470 I think it is good and has no backplate.

I am a windows 7 guy I get coa's on eBay for a Pc scrape seller.

He sends me a cutout  coa along with part of the dead pc.  It is legal and 10 to 15 usd for the price.

The biostar uses an m2 ssd 1 less wire.
No USB risers less wires.

And if you run GPUS a bit slower you can find 750 watt plat pcs on sale. The corsair ax 750 plat does the job.

One last thing make sure the m2 ssd is 120-240 gb.

I get crucial refurbished from new egg 240 gb 55 bucks. 16 bucks more  for 240 gb

I have found with Zec if you can find a cheap used i5 like the 6500t it is nice but does jump up price from the pentimums 4400.  That is 140 vs 60 that is a big jump.

But I just do it.  I get to run Zec at high intensity.

I can run 4 gpus doing Zec with the CPU mining 3 threads and watch a Netflix with zero issues.

Post edited.

Thanks Phil.

Cheers,

- zed