Quad 5870 miner ( need assist and have some questions) (.5 BTC For Fix)

[xioros]

Hi guys,

I'm getting my Quad 5870 miner home today  

But I have some questions:

1) Will it still pay off???
I pay my own electricity, I paid 1150 EUR for the rig

2) How do I set up linux for quad mining ( and hashkill? )
I'm new to these 2 ( i'm a windows Pro, but a Ubuntu newb)

3) How do I overclock my cards in linux?
    What is de max voltage for a 5870?
    What speeds should I be expecting?

4) Max temps for a 24/7 miner?
    I'm going to run them in a antec onehundred.
    Side panel off and a big CM megaflow 200mm fan blowing onto the cards

5) These specs are fine, right?

Sempron 140
790FX-GD70
2 GB ram
Silverstone strider Gold 1200W ( gold PSU , should save me some on a long term run)
Kingstone 8 GB SSD ( uses less power and produces less heat , the cheapest mechanical costs just a much.
Antec 100
CM megaflow 200mm

USB stick for the linux install.

I can order 4 more of these rigs , should I? ( really , 8000 Mh wont cause difficulty increase )

Answers would be greatly appriciated.

Grtz

Xioros

UPDATE:

Hi
Build the system and gues what...

It WON'T POST ....

I've tried:

Clear Cmos
Each ram stick individually
No Ram
Bleed cap

any more suggestions?

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[tunatime]

1 you need to earn about 82 coins to pay that off so that's going take a while
2 dotn know

3.1 dont know
3.2 about 1.3 safe if you have good cooling
3.3 if you have good cooling and a good card 950-1ghz

4 keep it under 80c and you will be ok but if you are over voting it keep it under 70c as you vrm will got hot

5 yea looks good to me

[nebiki]

use RBE to rewrite the card's bios'es. idk if you can do it in linux, but you don't really have to. you probably have a win machine running somewhere.

[xioros]

Hi
Build the system and gues what...

It WON'T POST ....

I've tried:

Clear Cmos
Each ram stick individually
No Ram
Bleed cap

any more suggestions?

[tunatime]

yea strip it down to 1 gpu 1 ram stick and see if it post but what is bleed cap?

[xioros]

pull power cable out,
Press son button 30 sec ...
Bleeds all the power left in the caps , some times it fixes.

update:
Tried both ram sticks and all GPU's individually, no fix

Now getting FF on the bootled

[Yeti]

Might sound like a stupid question... but are all the video cards connected to the power via PCIe power cables? Did you try using only one card first?

[xioros]

I'm going to make this clear:

All the cables are connected
The cards are NOT dead, they work fine in my other system.

This problem is CPU/MOBO/RAM related.

[xioros]

Got the system booted , a dump mistake from me

Now installing ubuntu
Is there anything I should know?

[Yeti]

Out of curiosity... what was it?

Ubuntu: Deinstall compiz if you want to use VNC. X server must be running or the ATI drivers are not available.

[xioros]

never mind xD
Help me a hand here :
http://forum.bitcoin.org/index.php?topic=17836.0