Some questions about rig and profitability

[Waxx]

Hi. I'm new to BTC. I read a lot about it, but still don't have clue. My main question is: is it worth to enter mining by GPU at this time? BTC is very expensive now and correction is obvious- dunno how deep. I heard about ASIC devices, but TBH in my opinion it is megafake- no one will sell fe. Butterfly BitForce 5 GH/s SC for $274 according to current course; it's better to keep it in mystery and making money by yourself. And as far as I know there is no trusted person who owns ASIC. I configured rig:


CPU:      AMD Sempron 145
MoBo:    GA-970A-DS3
GPU:    2x Radeon 7870 XT Tahiti LE Club3D 2GB 975MHz
       or
    2x  Sapphire Radeon HD7870 XT Tahiti LE 2GB DDR5 256bit (975/6000) [better cooling]
RAM      2 GB 1333 Goodram
PSU:       thermaltake smart 630w (2x 6pin + 2x 6pin from MOLEX) strong single rail
HDD:       40GB SATA
Case:       CM elite 310 140   or   Lian Li PC-T60A ATX Test Bench
~770-790 USD for this

According to my researches this rig will be able to generate above 1Ghash/s, power consumption- 500W


Is there any point to enter at this time with this rig to 'miners company', seeing that correction will come? On current course it is very profitable (investment will pay for itself after 3 months including electricity), but will this digger earn even for electricity after correction? I know that is the relationship between the number of miners, difficult and BTC course, but TBH I don't know how it exactly works and how it can affect BTC course.
I will be glad if someone can dispel my doubts even in piece.
I know my English sux, but I hope I wrote it understandable

[Waxx]

Bring Up My Post

[Aztec]

It all hinges on whether BFL ASICS will ship. If you buy that rig and then a week later the ASICS ship you will not make your money back. Alternatively, if they don't ship you might get away with it

Better to Buy BitCoins imho

[vm1990]

it looks like a good rig but you will need a bigger Power Supply a good 750w atleast, 850w if you can afford it
also go with
Radeon 7870 XT Tahiti LE Club3D 2GB 975MHz
the others might say better cooling but if there in a case theses are better as they will push most of the hot air out of the case and not bake all your components

as to whether its worth building in the first place its atually up to you GPU mining should be profitable for another 2-3 months but it all depends on when ASICS get released (they are out there already and there has been proof) but there only a small splash in a very large lake at the moment  

i also think unless your going to put one hell of and OverClock on them you looking more aroun 750Mhs as standard at most 850 if you do a n00b over clock with ATI vision Engine

[Waxx]

Thanks for your replies.

According to PSU- max what  I can effort is Corsair CX Series 750W (100$). Hope it is good  PSU.

Could you give me any source with proof of ASIC availability?

All ppl dissuade  Club3D because of low quality and bad cooling- dunno what think about it.

Btw. Should I invest in Lian Li PC-T60A ATX Test Bench? In CM 310 Elite this GPUs will be on fire (easily above 80C in summer) IMO.

[vm1990]

yes go with a test bench also most of the GPUs by cheap manufacturers are all the same budget card with pretty stickers but in the end there all made by ATI ATI have 3 class of the card
cheap and not recommend to run at full speed theses are the cheapest and most unreliable card
mid range which is slightly overclocked
and high end which make up the ones with heavy Overclocks 

if you go with test bench then go with Sapphire Radeon HD7870 XT Tahiti LE 2GB DDR5 256bit and buy a extra fan just incase the northbridge on the motherboard get a little hot

[Waxx]

Something about PSU- I investigated this case. This card needs 200W, so Thermaltake smart 630W will be ok.
http://pics.tinypic.pl/i/00362/gg0e2st1vg8c.png

And I wonder, is there any trusted source, that can confirm ASIC existence

[Humanxlemming]

Something about PSU- I investigated this case. This card needs 200W, so Thermaltake smart 630W will be ok.


And I wonder, is there any trusted source, that can confirm ASIC existence

www.btcguild.com/index.php?page=rankings

Rank    ID            Speed
1   67117   7,030.19 GH/s

yeah they are around because no human could do that without spending some major bank on parts.