Topic: AMD or nvidia sli for minning ?? (Read 440 times)

For XMR, the Vega blows both cards away badly while costing quite a bit less (if you can FIND one right now) than the 1080 ti - 1900 XMR hash tends to be a hair on the LOW side for the Vega RX 56 when configured correctly, compared to under 1000 for the 2 cards you list.
 Down side - you HAVE to run Windows 10 to get that kind of hashrate due to driver issues, any other driver/os setup you are lucky to get past 1300.

 For ETH, the R9 295x2 is a dual R9 290x on one board - cooling is marginal compared to the actual 290x, but it should be capable of mining ETH at somewhere between 50 and 60 MH/s vs the 1080 ti (WHICH IS NOT A GOOD ETH MINING CARD barely managing 35ish at most for WAY too much money), but does eat a lot more power to do so.

 IMO you should be looking at other choices if you really want to mine ETH or XMR - and on the 1080 ti you should be looking at algorithms it is GOOD at, like equihash (ZEC/ZEN and such) or lyraR2v2 and the other "traditional" NVidia algorithm strongholds.

 ETH might be the best choice for the R9 295x2 but a pair of RX 470/570/480/580 cards can nearly match the hashrate for WAY LESS THAN HALF THE POWER DRAW and run a lot cooler while doing so.
 If you can find that R9 295x2 cheap enough and your power cost is cheap enough, though, it MIGHT be worth getting.

 Also keep in mind that the R9 295x2 has been out of production for YEARS and is currently a full generation behind state-of-the-art for AMD, while the 1080 ti and Vega ARE current generation.

Ok, referring to the result on mine and your link

• GTX 1080ti (Electricity costs=0) = 0.00043921 BTC/day
  
• 290X (Electricity costs=0) = 0.00025 BTC/day. And then, 1 x (295x2) = 2 x (290x), So your 295x2 will produce 0.00025 x 2 = 0.0005 BTC/day.
  

using SLI & normal, not different

[YAZ] so u advise me to go with 295x2 ? and to mine for what ETH or XMR ?

can u post screenshot for ur minning hashrate ?

and sorry for a lot of Q ... im new in minning

it because u said "dont worry about power !! i'll not pay anythink its free". They say 1080ti is better than 295x2, because 295x2 need 500-watt power and 1080ti 250-watt. one more important, 295x2 equipped with water cooling system by default.

so what people are minning at this days ??

okay but when i try to check for gtx 1080ti i got this result

https://www.nicehash.com/profitability-calculator/nvidia-gtx-1080-ti?e=0¤cy=USD

so 295x2is better !! why all said gtx 1080ti is better !!

295x2 almost similar to 2 x 290x, 290x produced with 44 chips and each gpu on 295x2 also have 44 chips, 88 in total. Referring to this https://www.nicehash.com/profitability-calculator/amd-r9-290x?e=0.1¤cy=USD , most profitable algorithm for 295x2 is Crytonight and second ones are Equihas.

Since 295x2 is dual-GPU card, so 2 (295x2) equal with 4 cards. if you are using default setting(without OC), you'll get around 28.xx MHs each GPU or 57-57.xx in 1 (295x2) or 114-115 MHs for 2 (295x2). am using 1 (295x2) equal with 2 cards, each GPU get 30-32 MHs (OC mode) so I have 60-64 MHs.

No one uses 1080 Ti for ETH mining, that's not what these cards excel at. It's just ETH is the largest alt coin, and because of that it became some kind of universal "mining benchmark" (mostly for sites/channels where people know very little about mining). Nvidia cards with gddr5x memory (gtx 1080, 1080 ti, titan xp) are not competitive in ETH mining, they're good with other algos, so when you try to figure out profitability you don't compare something like 295x2 mining ETH to gtx 1080 ti mining ETH, you compare it to 1080 ti mining whatever it is the most profitable for nvidia cards at the moment. Which might be equihash, or Lyra2REv2, or skunkhash, or a dozen other algos.

And I'm not even sure that ETH is the most profitable algo for 295x2 cards, right now they're probably doing better on cryptonight.

ok dear thank u for helping me ....
but there are things not clear for me when i try to know what is the hashrate for GTX 1080ti 11 gb i found some websites said
https://i1.wp.com/1stminingrig.com/wp-content/uploads/2017/03/GeForce-GTX-1080-Ti-ethereum-profitability.png
source : http://1stminingrig.com/nvidia-geforce-gtx-1080-ti-mining-performance-review/

and some one post a youtube here he said he got 115 hashrate for 2 (295X2) cards that's mean 115/2 = 57.7 for each    :
https://www.youtube.com/watch?v=KVBzwKp44Po

so im confused now !!

By keeping it as cool as possible and powering it with a high-quality PSU. If you do it right, it'll live happily for many years. There's plenty of general mining guides out there, including on this forum, just start reading. GPU mining is not a "one button press" thing, you'll have to do some research about undervolting, setting clocks, fans etc.

ok bro i'll go with gtx ! i need to know about card health if i used it 24hours in 30days in month is it damaged ? how to keep the card as long as possible

if you have free electricity, 295x2 is better. am buying xfx 295x2 few month ago just for $450. Lucky am i

Come on, just read the previous post. 295x2 is faster for both xmr and eth. But even if you don't care about the power usage, this is still an old card, they haven't been produced for quite a while now so you're likely buying it used. You also didn't say anything about prices. If it's 1080 ti for $800 vs amd 295x2 for $10000, then no, go with nvidia. The amd card has been out of stock for a long time now, so we've no idea what you are to pay for it.

dont worry about power !! i'll not pay anythink its free i need the better for xmr and eth ! so what to choose ?

For the two coins you named the AMD 295x2 wins hands-down. Almost two times higher hashrate than the 1080 Ti. But it's an old power-hungry card, so I wouldn't buy it unless you're getting a very good deal.

Here I think the choise is evident: GTX1080Ti. At first 250W versus 500W. At second newest techprocess against preprevious. But for Cryptonight now Vega56 is the best choise

Try this https://www.nicehash.com/profitability-calculator/ choose your card type and the result will show the best Algo for your card. am using xfx 295x2 62-64 Mhs on Ethash (31-32mhs each, since this card is dual-GPU) I have not tried in xmr. Good Luck!