Thoughts on this Adaptec RAID controller

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http://forums.anandtech.com – I looked at the available pre-configured NAS solutions available and I wasn't too impressed since it seemed like you could get a lot more if you build your own. Hence why I am here. It seems like a lot of the motherboards available don't do RAID onboard or if they do, a lot of users don't recommend using it. Therefore, I was looking up available RAID cards from reputable manufacturers and came across this one. Adaptec RAID 6405 http://www.newegg.com/Product/Produc...82E16816103224 Is this card overkill for doing a RAID setup if I plan on setting up an 8-HDD RAID array? ASUS H81M-K (Hardware)