GTX 970 ethereum mining problem

[batfileerror]

Hello to everyone;

I have a problem like this. My computer has a GTX 970 graphics card, which gives me an output of "2.88-3.22" MH / s which I want to dig into an ethereum

When I look at the calculation, it is said that video card it is 22,21 MH / s.

What is the breakdown here, can you help?

In addition I think to make GPU rig. Which display card do you recommend?

First I'll buy 2 GPUs, then I will develop.

1060 x4
1070 x2

Which is a better choice?
I am open to all proposals.

Thank you for your answers already.

[GOLDbarISmine]

using windows 10?, try 7 works like about 18-20

[mr.bitcoinerf11]

using windows 10?, try 7 works like about 18-20

can you tell me where i can get modded bios
this will increase gpus hashrate thanks

[batfileerror]

using windows 10?, try 7 works like about 18-20

Yes windows 10, no other solution?

I can not install Windows 7.