Pls advise on purchasing multi gpu motherboard for litecoining

[#Darren]

Thinking of getting a motherboard with maximum gpu slots for litecoining.  Assuming I am running a state of the art gpu 7950/7970 or above, can anyone advise on motherboards I should look at?

[r3animation]

General consensus is that the 7950 is the best bang for the buck.

I believe the 7750/7790 aren't too great for scrypts.

[#Darren]

General consensus is that the 7950 is the best bang for the buck.

I believe the 7750/7790 aren't too great for scrypts.

Sorry, I have edited my OP, I meant 7950 and 7970 and above.

[mercSuey]

MSI Z77A-GD65 is what I have.  You can run 7 gpus on them.  They are very popular on the forums as well.

http://www.amazon.com/gp/product/B007QWIA52

EDIT:  I should add you need to use an Ivy Bridge Processor for the last PCI slot to be active. 

[mercSuey]

This might help:

https://bitcointalk.org/index.php?topic=200684.0

https://bitcointalk.org/index.php?topic=186877.0

[#Darren]

MSI Z77A-GD65 is what I have.  You can run 7 gpus on them.  They are very popular on the forums as well.

http://www.amazon.com/gp/product/B007QWIA52

EDIT:  I should add you need to use an Ivy Bridge Processor for the last PCI slot to be active. 

This might help:

https://bitcointalk.org/index.php?topic=200684.0

https://bitcointalk.org/index.php?topic=186877.0

Thanks 

[SirMintALot]

I'm currently mining YACoin (a Scrypt-jane coin, so it's a bit different than normal Scrypt coins like Litecoin):

GPU: Hashrate: Power consumption: Cheapest Price: 7790 57 kHash/s 50 Watt € 102 7950 94 kHash/s 200 Watt € 226

The 7790 has more than 60% of the hashrate of the 7950 at only 25% power consumption and costs 45% of a 7950. So I'd say the 7790 is the smarter choice, you just need more cards  

I will check with Litecoin in a minute.

Edit: here is the result for Litecoin (just standard BFGminer settings, you probably can squeeze out more):

GPU: Hashrate: Power consumption: Cheapest Price: 7790 213 kHash/s 50 Watt € 102 7950 469 kHash/s 200 Watt € 226

Ok, with Litecoin it's only 45% Hashrate of a 7950. So the hashrate/price ratio is equal, but the power consumption of the 7790 is still better.

If price and power consumption doesn't matter, and all you want to get is the max hashrate per PCIe slot, then the only choice is 7990. That  beast is two 7970 chips on one card and should give you 1200 kHash/s.

[#Darren]

I'm currently mining YACoin (a Scrypt-jane coin, so it's a bit different than normal Scrypt coins like Litecoin):

GPU: Hashrate: Power consumption: Cheapest Price: 7790 57 kHash/s 50 Watt € 102 7950 94 kHash/s 200 Watt € 226

The 7790 has more than 60% of the hashrate of the 7950 at only 25% power consumption and costs 45% of a 7950. So I's say the 7790 is the smarter choice, you just need more cards  

I will check with Litecoin in a minute.

Good points 

[lucazane]

with 4 7950 and voltage tweaking,
I get ~ 2400 Kh/s / ~640 Watt at the wall.

[#Darren]

with 4 7950 and voltage tweaking,
I get ~ 2400 Kh/s / ~640 Watt at the wall.

How much wattage do you think 2 7970's would pull?

[chondrite]

with 4 7950 and voltage tweaking,
I get ~ 2400 Kh/s / ~640 Watt at the wall.

How much wattage do you think 2 7970's would pull?

any psu over 600watt should be fine as long as it has at least 45 amps on a single 12v rail.