Can I get a suggested PC setup for 5x 280x?

[Delicieuxz]

Hi, I have some 280x cards that I'm wanting to put into a new rig, and I'm looking for a current choice build for the hardware. I have no firm knowledge of how many cards will eventually be in the rig, but at least 5 would be nice, unless there starts to be conflict issues or something once too many cards are installed.

Also, is this an optimal script for these cards?

cgminer.exe --scrypt -o stratum+tcp://coinotron.com:3334 -u Haze.1 -p password -I 18 -g 1 --worksize 256 --gpu-engine 1100 --gpu-memclock 1500 --thread-concurrency 24000 --gpu-powertune 20 --lookup-gap 2

[jvjv1]

What brand model cards you have? Some are voltage locked.

[Delicieuxz]

They're Gigabyte 280x OC.