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« [Parts Check] What do you think?Always build desktop »
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Krisnatharok
Caveat Emptor
Premium
join:2009-02-11
Earth Orbit
kudos:12
reply to Cheese

Re: [Coin Mining] Need input on a Litecoin mining rig

said by Cheese:

That link has a image of hash, 240kh/s is kind of...weak.

Getting 2 MH/s for 420w? That's hella impressive. I'm really tempted to put seven of them on a my backup mobo. I would just need CPU, ram, and PSU. And the seven cards.
--
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.


Cheese
Premium
join:2003-10-26
Naples, FL
kudos:1

lol, all that and oh yea, need the cards too! DOH!



Krisnatharok
Caveat Emptor
Premium
join:2009-02-11
Earth Orbit
kudos:12

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Celeron G1820 2.7GHz Dual-Core Processor ($49.40 @ OutletPC)
Motherboard: ASRock Fatal1ty Z87 Killer ATX LGA1150 Motherboard ($119.99 @ Newegg)
Memory: Crucial Ballistix Sport 4GB (2 x 2GB) DDR3-1600 Memory ($39.99 @ Microcenter)
Video Card: Zotac GeForce GTX 750 Ti 2GB Video Card ($149.99 @ Amazon)
Power Supply: Antec EarthWatts Platinum 550W 80+ Platinum Certified ATX Power Supply ($89.99 @ Amazon)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Total: $1349.30
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-21 12:42 EST-0500)
--
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.


Trimox

join:2012-09-24
Anywhere

I will say that the numbers look really good for the new nvidia cards but the problem will be the upscale.

Assume:

3x 750ti= $450= 840 kh/s at 180 watts

1x 7970, 280x= $450(you have to look hard but they can be found)= 750 kh/s at 250 watts

Ok you get more kh at less watts but you run out of pcie slots sooner. I did the calculations on break even at $.12 per kw it was just 30 days sooner (138 days vs 165) .

Now you have paid off the 750tis and you buy 4 more MB full. When with the 7970 you buy 2 more and still have 4 more slots, plus get more kh/s. No need to buy MB, ram, cpu. psu and risers (at this point saving are out the window).

When the new cards come out later this year we'll see if they can get them up to the 400-450 kh/s range, with close to the same wattage. If we knew mining was going to last 3+ years they would be good but nobody can say when it end or turn so I will stick to as fast as I can afford for a short run.



Krisnatharok
Caveat Emptor
Premium
join:2009-02-11
Earth Orbit
kudos:12

This is the problem I alluded to. If they can scale up to 0.5 MH/s per card, then we are talking some serious efficiency savings.

But right now, I'd need to build two two rigs to get 4 MH/s, whereas you could do that with four 290X's on one rig. The saving grace is being able to use a 500w PSU, which substantially cuts down on cost.
--
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.


primeomega

join:2004-03-11
De Pere, WI

1 recommendation

reply to Krisnatharok

Click for full size
Just wanted to throw a new update out. After some back and forth, got my 5th card up and running. So now have 5x 270's cooking for me. Pulling 933w (give or take) from the wall with no undervolt. Does not look like my 270 can be.


Krisnatharok
Caveat Emptor
Premium
join:2009-02-11
Earth Orbit
kudos:12

Very nice! Any problems with the fifth card?


primeomega

join:2004-03-11
De Pere, WI
reply to Krisnatharok

Could not get in under windows 7 at all. Tried tons of stuff that I found online. Ended up doing so much, broke the pc as it would not even mine and would just go blue screen on me. lol.

Did a install with windows 8, and it worked right from the start.

So not really sure, as I know windows 7 can do 5 cards. Oh well. No diff to me what OS I run, lol.



mk4111

@start.ca
reply to Krisnatharok

I think your calculation is a bit off, 4 x 750Ti = 1.2KH so two rigs would be 2.4, not 4.

but

I did some calculating 2 days ago when the 750Ti started hitting the mining boards and for the price difference between a PSU for a 4x750 rig and a PSU for a R9 270x x 4 rig you could build out another seperate rig and get about 400KH more with the 750Tis. With the 290x you would need 14 x 750TI to match the 4MH, which still cost $500 less than 4x290x for the cards alone. In the it comes down to how good of a deal you can find on the rest of the rig components. The PSU for 4x 750 Ti costs $80, the PSU for 4x290x costs $400-500.

Also you have to consider the amount of ram needed for highest --thread concurrency to work properly with AMD cards on cgminer, it is usually 2x of what is needed for maxing out Nvidia cards in cudaminer.



Krisnatharok
Caveat Emptor
Premium
join:2009-02-11
Earth Orbit
kudos:12

I was calculator 7x 750 Ti per rig, not four.


Trimox

join:2012-09-24
Anywhere
reply to mk4111

As Krisanatharok has stated before that at this point the 280x cards are the sweet spot for kh/s per watt to price.

Your calculations do become a little bit off once you look at expansion. Why just build a 4 card setup, get as many pcie slots on a MB as possible, 7 in this case for a reasonable price. Run 2 or more PSUs ($7 adapter), not 1 high dollar 1 that you can't reuse when you are done mining.

I personally run 2 1000w evgas that were $200 a piece. They are running 4 280x, and will run 7 280x (tight but will do it). Two 850w will run 4 290x and can be had for $338. But for expansion you could go with 2 1200w $552 and be able to run 7 290x (not as tight as mine but works).

You are right in that 14x 750ti will hash more than 4x 290x, but you will have 2x MBs, 2x ram, 2x CPUs, 2.5x the risers, 2x OS (if you don't run linux), 2x rack or crate (not much but still $) and will be maxed out on pcie slots. With 4x 290x you will still have 2 PSUs but 3 slots left for expansion.

As Krisanatharok stated if the newer nvidia cards hit the .5 Mh/s number at the same price and wattage it would be feasible but what are the odds of that .



Krisnatharok
Caveat Emptor
Premium
join:2009-02-11
Earth Orbit
kudos:12

I run my four 7970s with a single Rosewill Lightning 1300, which can be had for $250, and sometimes goes on sale for lower.

I also would stay away from 290s or 290X's that have the reference cooler. I've pretty much given up trying to mine with mine, which is fine as its primary purpose is gaming. Still, I'd be pissed if I bought it for dedicated mining.

If you are looking for greater throughput than what the 7970/280X offers, I'd recommend a non-reference 290(X) with a better cooler, or a reference card under water cooling.
--
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.



Ian
Premium
join:2002-06-18
ON
kudos:3
reply to Krisnatharok

So.... Has the Mt.Gox exchange going dark affected people's litecoin mining profits badly?

»valleywag.gawker.com/if-you-have···29946212



Krisnatharok
Caveat Emptor
Premium
join:2009-02-11
Earth Orbit
kudos:12

MtGox doesn't even accept Litecoin yet.

But yeah, Bitcoin finally crawled back up to $625 and then tanked to $480 yesterday. I am still mining, but holding onto the .60 BTC balance I have until things improve.

The problems at MtGox are possibly present in all exchanges, but they are in the spotlight as the first and largest exchange. All altcoins follow Bitcoin's lead, so everything is suffering right now until this DDOS attack technique can be dealt with.
--
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.



drslash
Goya Asma
Premium
join:2002-02-18
Marion, IA

The way I have read it is that MtGox suspended transactions due to problems with "transaction malleability". I was not aware that DDOS was part of the current situation. Regardless, we don't really know what is going on with MtGox. I expect an announcement of bankruptcy/dissolution.

I plan on mining in the support of virtual currencies and the communities. BTC at approximately $100 is break even for electricity costs. I plan on mining long term despite the volatility and bad news.
--
Save water...drink beer!
--
1-800-F1UCK-YO
--
Obama...it's junior high school all over again!
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Democrats don't mind raising taxes because democrats don't pay taxes.



Krisnatharok
Caveat Emptor
Premium
join:2009-02-11
Earth Orbit
kudos:12

The malleability is a DDOS. Someone is spamming the network with malformed or erroneous transactions. It doesn't affect transactions going through, it just slows it down and probably affects mining profitability somewhat.

MtGox is a nuclear trainwreck. As a rule, they skip testing code and implement insecure code in the wild. No wonder someone stole so much Bitcoin from them.
--
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.



Ian
Premium
join:2002-06-18
ON
kudos:3

said by Krisnatharok:

MtGox is a nuclear trainwreck. As a rule, they skip testing code and implement insecure code in the wild. No wonder someone stole so much Bitcoin from them.

Assuming that it wasn't an inside job. The principals seem to be AWOL. Perhaps on a beach somewhere enjoying a Pina Colada.
--
“Any claim that the root of a problem is simple should be treated the same as a claim that the root of a problem is Bigfoot. Simplicity and Bigfoot are found in the real world with about the same frequency.” – David Wong


Ian
Premium
join:2002-06-18
ON
kudos:3
reply to Krisnatharok

Heh.

Was curious and loaded up Cudaminer on my GTX760. 280 khash/sec. Not going to run the PC in my bedroom like a small jet for a buck a day less power. But interestin'.


primeomega

join:2004-03-11
De Pere, WI
reply to Krisnatharok

Seems about right. My GTX 670's pull 360 khash/s each. Should post your script, maybe can seen a few more out for ya!



Ian
Premium
join:2002-06-18
ON
kudos:3

said by primeomega:

Seems about right. My GTX 670's pull 360 khash/s each. Should post your script, maybe can seen a few more out for ya!

Nah. Thanks for the offer, but if I were to get into Litecoin mining in any way, it would be on a dedicated machine. I was just playing out of curiousity.
--
“Any claim that the root of a problem is simple should be treated the same as a claim that the root of a problem is Bigfoot. Simplicity and Bigfoot are found in the real world with about the same frequency.” – David Wong


Krisnatharok
Caveat Emptor
Premium
join:2009-02-11
Earth Orbit
kudos:12

I'd do seven 750 Ti's. 1.96 MH/s for only 420w.


JoelC707
Premium
join:2002-07-09
Lanett, AL
kudos:5

I think my pair of 5830's are pulling about that much power, and only doing roughly 500 KH/s

Sooooooo not efficient lol



Ian
Premium
join:2002-06-18
ON
kudos:3
reply to Krisnatharok

said by Krisnatharok:

I'd do seven 750 Ti's. 1.96 MH/s for only 420w.

Is there a motherboard that would drive that many? Or would that be a 2 MB rig?

JoelC707
Premium
join:2002-07-09
Lanett, AL
kudos:5

There's been at least one board made specifically for mining, asrock makes it IIRC and it has seven PCIe slots on it. You'll still need risers because unless you used all single slot cards, you couldn't fit them all on the board.



Ian
Premium
join:2002-06-18
ON
kudos:3

Mean this one? Looks like 6 is the limit.

»www.asrock.com/mb/intel/h61%20pro%20btc/



Krisnatharok
Caveat Emptor
Premium
join:2009-02-11
Earth Orbit
kudos:12
reply to Ian

»Re: [Parts Check] Need input on a Litecoin mining rig



Ian
Premium
join:2002-06-18
ON
kudos:3
reply to Krisnatharok

A US Senator lobbying to ban Bitcoin (and all crypto-currencies no doubt).

»www.theregister.co.uk/2014/02/27···bitcoin/

""The very features that make Bitcoin attractive to some also attract criminals who are able to disguise their actions from law enforcement."

While that may be undoubtedly true, it's also why criminals (including Senators on the take) have long favoured actual anonymous paper cash to conduct criminal activity. Does he want cash banned too?
--
“Any claim that the root of a problem is simple should be treated the same as a claim that the root of a problem is Bigfoot. Simplicity and Bigfoot are found in the real world with about the same frequency.” – David Wong



ekster
Hi there
Premium
join:2010-07-16
Lachine, QC
kudos:3

Speaking of them... I'm curious how many politicians and senators have received bitcoin donations by now.



Ian
Premium
join:2002-06-18
ON
kudos:3

I'd be curious to know if there are any that haven't..... Doubt it.


LittleBill

join:2013-05-24
kudos:1
reply to Krisnatharok

said by Krisnatharok:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Celeron G1820 2.7GHz Dual-Core Processor ($49.40 @ OutletPC)
Motherboard: ASRock Fatal1ty Z87 Killer ATX LGA1150 Motherboard ($119.99 @ Newegg)
Memory: Crucial Ballistix Sport 4GB (2 x 2GB) DDR3-1600 Memory ($39.99 @ Microcenter)
Video Card: Zotac GeForce GTX 750 Ti 2GB Video Card ($149.99 @ Amazon)
Power Supply: Antec EarthWatts Platinum 550W 80+ Platinum Certified ATX Power Supply ($89.99 @ Amazon)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Other: Zotac GeForce GTX 750 Ti 2GB GDDR5 PCI Express 3.0 Dual DVI Mini-HDMI Graphics Card ZT-70601-10M ($149.99)
Total: $1349.30
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-21 12:42 EST-0500)

is this a decent build? you guys still think this is worth getting into?

any idea on potential pay off for this system