Bitcoin Forum

i have this pc.
proc=amd a6 6400k
mobo=ga-f2a68hm-ds2
ram= 4g
psu=powerlogic atx-700-w

can i install 2x1070 and mine efficiently?
thanks in advance.

Adding 2x 1070 it should be ok if you have a high quality 700watts psu and enough 8pin power connector :)
Your system draw should be around 80-120watts , nvidia 1070 cards TDP is around 150W
2x150 = 300 + 120 = 420watts
Make sure you have enough 8-Pin power connector available from your psu to the 2x 1070
Your FM2+ APU ( a6 6400k ) should be ok to supporting that two PCI Express slots .

Mining efficiently ?
you need to know how much you paying for electricity $/kwh , then we can give you some advice about efficiently ?:)
make sure all the taxes and another fees included when you are calculating how much are you paying for electricity !

very informative, thanks

my psu doesnt have 8 pin connectors, its very low quality, 1070 is out unless i buy a new psu
how about 2x460 or 2x1050 or 2x1050ti no power connectors?

So you can afford 2*1070 card but not 700W PSU ? That does not make any sense. It only costs like 100$

If you are afraid that changing PSU is too hard then don't worry about it, label everything and take loads of pics and go for it. At least you will learn something :D

I suggest getting a 600W PSU at least, it's really cheap and will support 2x 1070s if you buy one with enough 8pin connectors to support the GPUs. Also efficiently refers to how much money is made per $ kw/h. You can check by finding a calculator for the coin you intend to mine, and entering your system info / hashrate.

I would also suggest upgrading your PSU, especially if your current one is a no name or generic brand. I have never heard of Powerlogic brand before so it may very well fall into that category.

Some of the cheaper PSU's won't supply their full wattage, at least for any length of time, before going poof. Stick with decent name brand ones (Corsair, Evga, Seasonic, etc.) as mining puts stress on your PSU like no other computing task. Even when gaming you might push it once in awhile, but mining is full throttle 24/7 non stop abuse and your PSU needs to be built to take it.

Expanding on the advice you already got from the other posters, you also want to size it appropriately. Normally the recommendation is to keep your maximum wattage load to about 80% of your PSU's maximum output. So for example, a 1,000 watt PSU could comfortably put out 800 watts continuously.

If you plan to add more GPUs in the future, you will need something that can dish out the power so I would say buy the biggest PSU you can afford within reason. From your setup a 850 watt unit might fit the bill, giving you room to grow and still providing the 20% cushion. I say 850 watts simply because there are quite a few decent brands in that capacity right on either side of the $100 mark ($90-$110). With an reputable 850 watt PSU you will have about 680-700 usable watts. This would power as many as 4 x 1070's along the rest of your system with ease.

got it. no mining for my current psu. back to 1070's.
 is it ok not to use risers?
in case i use risers, any recomended riser?

if you have two pci-e x16 lanes available then there is no point using risers.