@djm34 please share your thoughts on my plan for new rig https://bt.irlbtc.com/view/167229.msg6181805#msg6181805

The psu seems a bit weak...
On the paper that's look ok, but I wouldn't feel confident running all that.(need to look how much the cpu/motherboard will use and it is better to have some headroom) I have a RM 860 and so far I haven't tried to add to the R9 and 780ti, my old gtx660 (which would give about the same power usage as what you are planning, without the asic.
Obviously adding the 175W of the asic is a no go with this power supply (for the price, I would personally look more into a scrypt asic, they also do sha256)

Unless you really need the thunderbolt connections, I would get the Z87 UD4 board instead http://www.newegg.com/Product/Product.aspx?Item=13-128-617

Then you would be able to run 6 cards if you wanted down the road. If you put 2 750s without 6pin on the lower slots like I do, you can also feed supplemental power to the pci slots with the sata power on the side of the board for added peace of mind.  I would then use USB powered risers with a 3-6ft cable going to the additional cards out the back.  I'm able to fit 3 cards comfortably in my case but I have directed a fan at the 2 on the lower pci slots to force air in there.  Still don't get over 68C, but I like to have all my components below 70C all the time for some reason.

For PSU comparison.  I'm also running 6 EVGA FTW 750Ti's on a H81 BTC mobo in a milk crate with an i3 4130 and it pulls up to 550w at the wall.  Those cards have a 35% increased TDP so 6 regular cards "should" be less.  All of that is on a 80plus gold Capstone 650watt and even though sometimes it's slightly over the 80% max load I like to keep it near, the efficiency doesn't drop more than a percent or two.  Getting a good 850 or 1000w(if it's not much more than the 850) would be a good idea if you want to add 8 series cards later.  They should be more efficient than the 750s, but they still might need 300-350 watts for 2 of them if they turn out to be similar to the rumored specs.  Moral of the story: Buying too much power in a power supply is never a bad idea if you can afford it and the full system load is somewhere between 40-80% for the best efficiency.

**Forgot to mention that I also wouldn't buy that asic card.  For that money you could build another rig of 750s and get about the same profitability mining other coins, plus you could sell the hardware later whereas you might have a difficult time selling an asic card since newer and better ones always are right around the corner.

@Dotcommie

I was looking for ASIC as it is simple plug and play if it ever ships as opposed to mining the right coin and selling it at right price. Also, Multipools are not that profitable right now. but as I said nothing less than a TH/s is profitable at current prices so it will be a gamble.

you are right but btc difficulty rises about 16% per month so delay kill the profitability of product. they are offering 1 free ASIC or newer ASIC for those who pre-ordered in december. who knows if it turns out to be a scam in the end.

thanks for that info N8. I will look into it.

I looked into mobos and UD4H as suggested by Dotcommie looks fit for my requirements. Please can anyone suggest a brand for 750ti to buy.

@Heuristic

Yeah you are right. I will have to see. I looked for Antminer S2 but its too expensive and only one that has already shipped. Do you have any suggestions for $1500.

what is ppc ?

http://www.peercoin.net/. I believe it is an X11 coin, and as such, is not supported yet by CUDAminer. Or did it miss the release?

By the way, is there any way to make 'a href=' work on this forum?