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How fast of SSD can this raid controller support? IBMx3650 w/ServeRAID-8k-l

I have this server, and I'm going to populate it with SSD's.

http://www-07.ibm.com/systems/includes/content/x/hardware/rack/x3650/downloads/XSO03034USEN.pdf

It has the ServeRAID 8k SAS Controller, which only supports SATAII.

ServeRAID-8k
Battery Backup Cache: YES
Cache Memory: 256MB
Max Transfer Speed: 3Gbps
Interface Bus: DDR2: 64bit at 533Mhz

It's a slightly older IBM Server with dual Quad Core 2.4Ghz xeons and 48GB of ram.

It's got 5 36GB 15K SAS drives in it now, but I want to put 8x128GB drives in it. 6 in a raid5 array, and 2 as hot spares.

I've decided on SSD vs SAS because of the nature of the server (that's a talk for another thread).

I'd really like to get the Samsung Pro 128GB.

http://www.microcenter.com/product/...ATA_60Gb-s_25_Internal_Solid_State_Drive_(SSD)

But I wonder if it's worth it when compared to some slower, but much less expensive drives. I'm struggling to think that the raid controller would actually have the throughput to maximize 8 high speed SSD's since it doesn't even support SATAIII

Since money is somewhat of a factor, if it's pointless to pay for an ultra fast SSD because I'll have several in an array who's combined throughput is far beyond what the controller supports, would it be wiser to focus on a slower, yet reliable SSD that will cost less? Because even if it's slower, several in an array might still be more than the controller can support.

Thoughts?
 
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