Raid 0 x58 sabretooth crucial c300 issues - rubbish read speed

Hello,

I am trying to create a raid0 array using 2x Crucial C300 64gb drives. I am setting them up on my Marvell controller (my motherboard is an Asus X58 Sabretoorh) using sata 3 6gbs but its no faster in terms of read speed than the drive running on its own. Do I need to setup the array on sata 2 instead?
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More about raid sabretooth crucial c300 issues rubbish read speed
  1. The Marvell 9128 6G chip on most boards maxes out at just over 400MB/s and has poor caching performance. The newest 9182 Marvell chip is much stronger but very limited in use so far. Has to do with the PCI-E 1x speed bottleneck on your board.

    You'd be better off on the ICH10R if you have it available.
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