Bitcoin Forum

hello i have 3btc to build mining rig, before i build it, im confused because so many new algo for altcoin.
anyone can give me some idea..?

so you have roughly $1275 USD. Ethereum is obviously profitble but with growing difficulty and the looming POS I wouldn't recommend going for a cost effective Eth rig like 280x or 270x. I think you would benefit from a more well rounded 3 GPU rig that can has well on other algos. Research R9 290x(great for ethereum) or GTX 970 Strix edition, can find them both used-refurbed-new from $300-$400 grab 3 of those, a MOBO with at least 3 PCI-e slots, most likely 3 risers depending on the board. Mediocre CPU (no more than $50). 50gb-100gb HDD/SSD. And windows if you are going that route. It would be cutting it close on budget, but I think you would benefit more from that more than say a 6 280x refurbed rig.

Do you have any dual or quad core,8gig ram PC's (parts) layin around with a 750 watt psu ???

If so you just need a vid card or two  ;D

Here's a good list to look for a card :

http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&IsNodeId=1&N=100007709+600007787%20100007709%20600007787%20600286741%20600100181#close

Check every page deals can be hidden deep  ;)

I would think if you have no prior knowledge on how mining equipment works, then I would suggest that you buy a pre-configured system so that will simplify things to get you going.
Then once you get the hang of it to upgrade parts on it to tweak it so to have it running at it maximum capacity.

you can buy with 250 euro or usd all the thing minus psu and gpu, then you decide if you want few gpu you buy a little psu so around 100? and what remain for gpu

anyway this is my daily usage computer maybe i will use it for mining
ASRock Motherboard Fatal1ty B150 Gaming K4/D3 + I5 6400 + ram corsair 4gb + FSP aurum 700watt 80+gold
must i upgrade my ram ? PSU ?
before buying new VGA for mining

i will use my old cpu ddr2 to daily usage

and which algo can i mining with gpu...?

Ram is good,have to see what vid cards you get,but that 700 watt PSU should be good for up to 3 midgrade cards (not the 290,390,7990 kind,only maybe 2 of those).

If you can build a PC from free scraps,like I did & do,you just buy a vid card...you can always sell it & get alot of your money back later on  8)

You have to do the homework,there are sooo many coins to mine,but which one will make a profit...is anyone's guess  :o

Keep looking in this forum for GPU only coins,Eth is good ATM...x11 coins...x13 coins...many others...google is your friend in this too  ;)

3 bitcoin is about $1250. So you can buy 3 R9 390 and other components to mine the Ethereum.

AMD R9 390 has 8 GB memory, so it could be useful in the future mining. But the ROI might be longer than cheaper cards.

you can not, 3 390 alone cost around 1k, and the psu cost 250 at least, so you need other 250....

Start with 2x390 and make some profit. Use the profit to buy another 390. And increase the farm this way.

I looked through that list on Newegg a few weeks ago & found a Sapphire 380 4gig for $194.99,they offered a free game (nothing to me),but they offered a $20 gift certificate(we have a winner!!!).

So after I bought it I got 3 day shipping for $4.99,total=$199.98,after gift certificate =$179.98  8)

It mines stock at 20-22mhs at 57c fan at 80%.ROI in about 2 months (with my paid off 7970 helping)  ;)

I don't see spending $250-350+ on a card ATM,the mhs per dollar is what I used to decide on the 380 (bang for the buck).

The 380 at $180= $8.18 per mhs....the 390 at $390=$12.58 per mhs,so it's up to you which is a better deal  ;)

first off do you have zero gear?

no parts nothing?

I wouldn't buy any hardware at this point you wont likely ROI.  Buy 3 BTC worth of DCR and stake it, a gui wallet is coming out soon.

https://bittrex.com/Market/Index?MarketName=BTC-DCR

My current Ethereum mining rig cost me equivilent of a bit less than 2 Bitcoin (not counting the power supply, that would probably put it a bit OVER) - but it wasn't intended originally for Ethereum so it's nowhere near optimised for mining.

 20/20 hindsight, I'd use a different motherboard and case - I've found a very few motherboards that DON'T put a PCI-E slot right at the edge of the motherboard (limiting that slot to a single-width card in every case I've seen to date), or they have 4 total slots spaced out so that 3 of them are fully usable for dual-width cards (abet a bit tight on cooling clearance) AND that 4'th slot that's only single-width-card usable.


 It's too bad nobody ever made any single-width card more powerfull than some of the AMD HD 7750s (especially the low-profile Sapphire card), or that case makers aiming at "high-end gaming systems" don't pay better attention to making that end slot USEFULL and leave enough space and the slots to mount a dual-width card in that last slot BY DESIGN.


 If anyone knows of any such cases, feel free to post/send me links!

The AMD R9 nano is a small card.

AMD R9 nano is a short card, but it still occupies two PCIE slots. The power consumption is also larger.

R9 nano is a DUAL-slot width card - it's about the same size as my EVGA GTX 950 SC cards, perhaps a hair shorter but SAME width - that WIDTH is the issue, not the card length.

 It's a nice powerfull card (though works very poorly on Ethereum per every posting I've seen about it), but kinda expen$ive. From what I've seen it doesn't seem to mine Ethereum anywhere near well enough to justify the cost, as R9 cards at about HALF the price can match it's hashrate.

 I'd LOVE to have about 9 of them crunching RC5 though - that would be "instant #1 on the daily list" easy (my off-the-cuff ballpark estimate is that 6 would be a tossup in production for that #1 position).



 If you want to see a true SMALL card, look up the Sapphire low profile 7750 card - it's the most powerfull "TRUE single-slot" card I've ever been able to find info about (and as luck would have it I managed to buy one of the last ones Newegg ever had for sale).

 I don't know why AMD chose to ignore the 7750 when they did their "rebrand" on most of the initial R5/R7/R9 line, the best single-slot card in THAT lineup was only a 384 Stream unit card vs. the 512 on the 7750, and same issue with low-profile cards (which are the most likely to be TRUE single-slot cards this past decade and some).

AMD R9 nano is a very efficient card, but it is too expensive. It ROI days are about 60% more than the R9 390.

stop everything new cards are coming, and 1 of those is equal almost to two, but the info gathered on the web, this is insane! and they will cost the same, even better

The initial cost will be higher for these new cards. If you buy old cards now, You can make some profit now.

wooh we got someone with some brains here :D ..... yeah that sound like best idea here lol but i would recommend waiting i think price will go a bit lower


also you NEED to know your profit per day / electric cost  ... and you can make like 5% a month just sitting on your btc at poloniex lending service .. you need to see all your options before rushing in mining rig

Im not interesting to landing, Trading, staking altcoin. now im focus at mining.

anyway today i called my friend, he have idea to use solar panel, the cost arround $450/1000watt
hope i can built and start mining at next month

can you give review about this card ?
SAPPHIRE NITRO Radeon R7 370 DirectX 12 100386NT4GOCL 4GB 256-Bit GDDR5 PCI Express 3.0 ATX Dual-X OC Version (UEFI) Video Card
$134.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202152

I think the 370 will get you about 14 mh per card and the price per MH on that is quite high...

newegg has a refurb R9 290 reference going for 200 bucks right now and ive been thinking about that card.  But its a turbo type fan, and runs loud and cooling sucks on those type of designs...so with summer looming over us it might not be a good choice.  A few days ago they had a triple fan R9 290 refurb selling for $205 and I wish I get in on that as it seem would be much better than the base 290.  Anyway those deals go fast and you will see them popping up on ebay because people are assholes and think they can make a few bucks flipping those cards when they go on sale.

Anyway just figure out the price per MH for each card you are considering, the psu you have and other factors such as heat, noise, warranty and such.  That should allow you to make an informed decision.

i think it's better to wait polaris will be released in two month, it would be a pain to sell everything after two month, and anyway there is not enough profit anymore, etheruem diff is very high

sh*t only 14mhs  :o
i think radeon HD 7990 is best GPU but very hard to get at my country, it's like limited edition.


polaris will release new GPU ? R9 series ?

They should be calling it R9 480 and 490.  Those those new GPUs will be too late and too much money to mine with.  The new GPU will probably cost about $500 and roi will basically be impossible at that price.  If you mine with a new 390 now you could probably roi about 50% by the time new GPUs are released.

this assuming that no new profitable coin will come out

I have quite a few HD 7990, if you undervolte them, they are as efficient as the undervolte R9 390. But the hashing rate reduce all the time.

That's not a whole lot...but the R9 370 series cards are low power draw, and Newegg has them for $130 brand new if you know where to look.

I usually use the high end GPU. I can get more hash rate per rig. So the cost CPU/memory/Motherboard per GPU will be lower.