Perc 5i or Intel Raid 5 + SSD caching?

[Mercutio]

Just a quick one out of curiousity.

Does anyone know which is generally the better performer? Have 4x1Tb spinpoints on a perc 5i at the moment with an SSD for boot.

Would I get more from a second SSD (specifically a 64GB crucial C300 I have spare) caching the raid 5 using the onboard controller? Running on an Asrock Z68 board.

 

[PistolPete]

Do you have the BBU for the Perc5? If not, I'd consider that first.

 

[Mercutio]

Aye, it's running on a BBU with Read ahead and write back enabled. Not much more I can do for performance from it (apart from adding more drives of course )