Working on 4 Card Rig and Need Tips

[bitbyebit]

Hello:  I have this list for a rig I am building.  I would appreciate any suggestions as to whether this will work.  I am not sure if the power supply is enough.  I would like to run 4 cards with risers.  So far what I am thinking of is:

ASUS F1A75-V EVO FM1 Socket A75 SATA 6Gb/s and USB 3.0 ATX AMD A75 FCH ATX DDR3 1800 AMD ?FM Motherboard
http://www.amazon.com/dp/B005EV1R5W
AMD APU A4-3300
4GB DDR3 1600MHz Memory
850W ATX Power Supply

I want GPUs that aren't voltage locked and are flexible.  I am thinking of getting four of these cards.
 
Sapphire Radeon HD 7950 3GB DDR5 HDMI/DVI-I/Dual Mini DisplayPort PCI-Express Graphics Card with Boost 21196-00-20G
http://www.amazon.com/gp/product/B00BXVFM3K/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER

My questions:
1) Will this board handle four cards?
2) What kind of cards do you suggest?
3) If you could buy four GPUs that could give you the best hashrate costing between $100-400, would they be?

I know these questions have been asked numerous times, so please bear with me.  Thanks.

[1713939970]

1713939970

[grue]

1. you can get away with a cheaper motheboard if you use x1 -> x16 risers.
2. 7950
3. 7950

[bitbyebit]

1. you can get away with a cheaper motheboard if you use x1 -> x16 risers.
2. 7950
3. 7950

Thanks grue.  I do like those 7950s.  Can you look at the mobo I mentioned and tell me how many cards can that board handle?

[JimCGSavings]

Found this link in the forums somewhere: http://www.coinminingrigs.com/budget-mining-rig/

Same guy did this guide: http://www.coinminingrigs.com/quad-7970-mining-rig/

[Viceroy]

one card per pci-x.  he suggested using a riser, which is a cable that connects your gpu to the mb through ANY pcix interface.  so just count the pcix interfaces.  his point was you do not need pcix16 slots, pcix1 is just fine.

[bitbyebit]

one card per pci-x.  he suggested using a riser, which is a cable that connects your gpu to the mb through ANY pcix interface.  so just count the pcix interfaces.  his point was you do not need pcix16 slots, pcix1 is just fine.

Thanks Viceroy.  So I am seeing 5 slots then.  What do you think of the power supply?  Is 850 watts enough to power four 7950's?

[Viceroy]

one card per pci-x.  he suggested using a riser, which is a cable that connects your gpu to the mb through ANY pcix interface.  so just count the pcix interfaces.  his point was you do not need pcix16 slots, pcix1 is just fine.

Thanks Viceroy.  So I am seeing 5 slots then.  What do you think of the power supply?  Is 850 watts enough to power four 7950's?

You can check that based on the wattage the card pulls but I'd say no.  I have corsair 1250 watt ps's in my boxes with 3 dual gpu cards.  The biggest problem you are likely to have with all those cards is heat.  You need to move some serious air across those cards to keep the thing humming.

[bitbyebit]

one card per pci-x.  he suggested using a riser, which is a cable that connects your gpu to the mb through ANY pcix interface.  so just count the pcix interfaces.  his point was you do not need pcix16 slots, pcix1 is just fine.

Thanks Viceroy.  So I am seeing 5 slots then.  What do you think of the power supply?  Is 850 watts enough to power four 7950's?

You can check that based on the wattage the card pulls but I'd say no.  I have corsair 1250 watt ps's in my boxes with 3 dual gpu cards.  The biggest problem you are likely to have with all those cards is heat.  You need to move some serious air across those cards to keep the thing humming.

Good to know.  I will get a 1250.  Do you prefer Windows or Linux?

[Viceroy]

Good to know.  I will get a 1250.  Do you prefer Windows or Linux?

Read the centos install in my sig and then ask again

[bitbyebit]

Good to know.  I will get a 1250.  Do you prefer Windows or Linux?

Read the centos install in my sig and then ask again

LOL!  I'm reading now.  Sorry, I have had a long day.