Quote from: duniek on November 18, 2017, 01:28:58 AM

Of course volume can be smaller - just multiply width x lenght x height

Why? You selected arbitrary dimensions for whatever reasons you've had, and then somehow made a conclusion that a vertical rig takes up less volume than a horizontal one by comparing two frames that you already have? All this proves is that your vertical frame takes up less space than your horizontal frame. But people asked you why bother with vertical frames in general, and as one of the reasons you said that they take up less volume. But they don't, it's only your two particular frames that demonstrate this kind of difference. There's nothing about vertical frames in general that somehow makes them take up less volume than horizontal frames, at least I can't think of anything. Maybe I'm missing something here.. Let's say we've got an ATX board with 8 GPUs and 2 PSUs. How does assembling all this hardware vertically save any volume compared to a classic horizontal frame?

Quote from: duniek on November 18, 2017, 01:28:58 AM

Risers mounted on spacers is very helfpul if you changing cards often and also can be mounted a lot quicker, i change cards bcoz I am buying them used from gumtree/ebay and also there are different models

WHY?
COST
after i leave shop, electronic parts lost value immiadately - doesnt matter if used 1-2 days of 3 months - 40$ instant loss for one card
8 x 1070 - lost in value 300-320$
this 330$ I will mine in 33-35days

and i dont even add other parts to the equation, like psu/cpu/ram etc

You lost me there. How is buying parts used in any way related to changing cards often?

It doesn't matter where you buy your GPUs new from a store or used from ebay either way you buy them for a mining rig. You install the cards (new or used) and then you mine with them. Why buying used cards make you rape your risers frequently by installing/removing the cards?

Quote from: duniek on November 18, 2017, 01:28:58 AM

so if you do the math and for example build NEW mining rig from shop, and want to sell it after 2 months you will realized your profit will be close to zero

Why would I buy a mining rig and then sell it after 2 months? Do people actually do this kind of stuff? What kind of a business model is that? Why not just keep the hardware and keep profiting from mining until the new generation of GPUs show up?