can i still mine bitcoin with my graphics card ?

Yes, if you find a good deal on a time machine back to 2012. Otherwise invest in an ASIC miner or just buy BTC.

Yes, you can power the VGA inputs from different PSU's. What's important is that all the risers are powered by the same PSU that powers the motherboard. BBT has built more rigs than many of us put together and in several of his videos he adamantly says you MUST set up multiple PSU rigs that way. Otherwise you will create ground loops. The links in my post also explain why you need to set it up that way.

Another good budget option for ZEC and ETH mining are the Nvidia 1060 3 GB cards for ~$220 or less. They can do ~260 H/s on ZEC and ~22 MH/s on ETH and only use about 60W of power each at 60% TDP. There is also much better availability than the RX series AMD cards.

Overclocking will obviously increase the hashrate, but it also makes the card work harder for that increase. Resulting in more power consumption, heat and decreased stability if over done. The better question is if overclocking is more profitable and at what point does it decrease mining efficiency. Most would agree the highest efficiency is reached at a point where the card is stable and any further increase is not producing any substantial benefit when the other factors are taken in to account.

There's your problem. You assumed something that is not stated anywhere in the listing. The seller guarantee's the components in the bundle will work together for a good OOBE mining setup. Not top of line components or the cheapest option. If you know what components to get on your own, then why didn't you do so?

Go with the 750W or 850W EVGA G2/P2 instead of a 650W. The cost difference between the two is less than $50. The 650W only has two VGA connectors while the 750W has four and the 850W has four 8-pin + two 6-pin pigtail cables. The PSU will also run more efficiently using less of the maximum capacity.

A pool is not a bank or online wallet service. It's always safest to transfer the coins to your local wallet to store your coins. Set your auto-payout on the pool to an amount you are comfortable with.

If he's your friend you should tell him to list his cards on eBay or Craigslist where he can easily get $350+ for them.

A 1000W PSU will work with up to four 1070's with dual PCI-E power inputs. The 1000 W P2 has six PCI-E 6+2 cables and two of the cables have a 6-pin pigatail. I would suggest using an 8-pin splitter with two of the PCI-E 6+2 cables and the two 8-pin + 6-pin pigtail cables for the four 1070 VGA power inputs. You can then use the remaining two 6+2 PCI-E cables with a 8-pin splitter cable to power four PCI-E risers.

https://www.amazon.com/Phobya-PCI-E-Splitter-Cable-Sleeving/dp/B00A5TA7NG

I find setting the clock speeds via Claymore to be unstable and inconssitent at best, especially for multiple cards. I use MSI Afterburner to set the core clock, memory clock and undervolt for each card before starting the miner. Much more reliable that way.

If you have access to the fuse box, you can check each breaker for the scokets it uses with a light bulb. Running more than 2-3 six card rigs is going to present a ventilation problem even with AC.

It depends on how quickly you want to get started. The quickest option would be to go with 5 1060 6 GB cards for around $260 each. That should give you ~130 MH/s at around 500 W of power @ 60-70% TDP. You also need to upgrade your PSU, as a bronze PSU running under load 24/7 is not going to be up to the task. An EVGA G2 850 W for ~$130 would give you enough wattage and connections for up to 6 1060's.

The better option would be to go with 6 x RX 470 4GB cards for around $200 each. That would give you ~165 MH/s at around 600 W or around 750 W if you dual mine. The problem is finding multiple cards in stock without getting gouged is going to be tough.

Do you have the 8-pin CPU power from the PSU plugged in the motherboard and do you have the two 4-pin molex PCI-E power connectors plugged in as well?

That's a limitation of Windows. In Windows 10 you can run up to eight cards using the same drivers, so you can eight AMD cards + eight Nvidia cards. Either add a different card for the 9th GPU or switch to ethOS, smOS which are based on Linux.

If you can get the cards for ~$200 and don't pay too much for power, I would say it's a pretty low risk investment. The current return timeframe to break even on a $200 RX 570 4GB is ~44 days on ETH and about ~35 days if you dual mine.

https://whattomine.com/merged_coins/1-eth-dcr?utf8=%E2%9C%93&hr_eth=28&fee_eth=3&hr_dcr=750&fee_dcr=1&p=200&cost=0.1&commit=Calculate

On ZEC the timeframe is ~55 days

https://whattomine.com/coins/166-zec-equihash?utf8=%E2%9C%93&hr=290.0&p=200&fee=3&cost=0.1&hcost=200&commit=Calculate

The PSU is the second most important factor in a rig besides the GPU's. You need a good quality gold or better rated PSU that can handle the load and have all the connections you need. A ~$110 EVGA G2 750W or 850W PSU can easily handle up to four cards. The higher efficiency will also save you money in the long run.

https://www.newegg.com/Product/Product.aspx?Item=N82E16817438018

That motherboard should be able to handle up to 3-4 cards. The problem with more than two cards in a case is it will be hard to get good airflow to keep the temps in check. If you have more than two cards I would suggest removing the motherboard and building the BBT mining case below out of two 8ft pieces of 1/8" x 3/4" angled aluminum, one 8 ft 1" x 3" piece of pine and #8 1/2" self-tapping screws. The case will fit up to 7 RX 4XX/5XX if you put them about 1 inch apart. The cost of the aluminum angles and screws was ~$35. If you build it out of all wood, the cost would be less than $10. That's a much better design that allows for good airflow.

https://www.youtube.com/watch?v=D5xNrlxsCVs



The only tools needed were a drill with a 3/32" hex titanium drill bit to drill pilot holes and a #2 phillips screwdriver bit. A hacksaw with a 32 tooth blade and a plastic miter box to cut the aluminum and wood. The case is very sturdy and can support up to 7 GPU's.

BBT also recently uploaded a case build video with a smaller form factor for a four card rig:

https://www.youtube.com/watch?v=8n9tgRw_JkM

The benefit of the previous case is it would give you room to expand in the future. Though I would also suggest making the case 1.5" taller from 9 1/4" cuts to 10 3/4" cuts to give you more clearance when using USB risers.

There is definite quality difference between risers. The better risers, like the ones in the OP link have four capacitors for a more stable current flow compared to the three used by the molex and sata risers and also have a voltage regulator to prevent spikes. The 6-pin risers also use three thicker wires that are designed to spread a higher 12V load instead of the two thinner wires used by molex and sata connectors.

The Claymore epoch benchmark figures are just an estimate and largley overstated. In my own test with a five card RX 480/580 8GB and 570 4GB rig. The benchmark at epoch 129 for the five cards was ~143.3 MH/s, at epoch 130 the benchmark was ~142.5 MH/s. The actual current dual mining hash is ~144.1 MH/s dual mining with DCR. Only a fool would sell his RX cards to buy overpriced Nvidia cards to mine ETH based on benchmarks. As I said in my first post even a 10% drop in the RX cards hash in 6 months can be offset by addding a single $200 RX 570 4 GB card.

Cryptomined preview of the Biostar TB-250 rev 2 12 PCI-E motherboard:

https://www.youtube.com/watch?v=9zU2zHBTg8g


According to Cryptomined you can run up to eight AMD cards + up to eight Nvidia cards on the same rig in Windows.

Whatever you do to the first set of straps, do to the second set of straps. i.e. if you copy and paste strap 1 1500 MHz to 1650 MHz, then copy strap 2 1500 MHz to 1650 MHz.

Why would I want to sell my RX cards? People are buying Nvidia 1060's now for $230 that mine ETH at ~23 MH/s and don't have anywhere near the dual mining performance of the RX 570 4 GB for $200. The Nvidia mining GPU's are based on the 1060's from what I have read. I would expect at best a 10-15% improvement over the regular 1060.