3rd party SSD drive in HP Proliant server only shows 3G transfer speed

The 410 / 410i seemsto be limited to 3Gb/s for SATA disks (6Gb/s SAS and 3Gb/s SATA support)

http://h18004.www1.hp.com/products/servers/proliantstorage/arraycontrollers/smartarrayp410/index.html

This is normal... It's not an issue, as you won't be saturating the link. It's just a controller limitation.

This is with an OWC Mercury disk:

   physicaldrive 2I:1:7
         Port: 2I
         Box: 1
         Bay: 7
         Status: OK
         Drive Type: Data Drive
         Interface Type: Solid State SATA
         Size: 240.0 GB
         Firmware Revision: 502ABBF0
         Serial Number: MX6G24012E20K3259   
         Model: ATA     Mercury EXTREME 
         SATA NCQ Capable: True
         SATA NCQ Enabled: True
         Current Temperature (C): 35
         Maximum Temperature (C): 58
         SSD Smart Trip Wearout: Not Supported
         PHY Count: 1
         PHY Transfer Rate: 3.0Gbps

Looking at the HP-branded SATA SSDs and 6G SATA drives in a DL360 G7, we get a similar result of PHY Transfer Rate: 3.0Gbps:

  physicaldrive 1I:1:3
     Port: 1I
     Box: 1
     Bay: 3
     Status: OK
     Drive Type: Data Drive
     Interface Type: Solid State SATA
     Size: 120 GB
     Firmware Revision: HPG7    
     Serial Number: S0CWNEAB501611      
     Model: ATA     MK0120EAVDT     
     SATA NCQ Capable: True
     SATA NCQ Enabled: True
     Current Temperature (C): 19
     Maximum Temperature (C): 65
     SSD Smart Trip Wearout: Not Supported
     PHY Count: 1
     PHY Transfer Rate: 3.0Gbps


  physicaldrive 2I:1:8
     Port: 2I
     Box: 1
     Bay: 8
     Status: OK
     Drive Type: Data Drive
     Interface Type: SATA
     Size: 1 TB
     Rotational Speed: 7200
     Firmware Revision: HPG3    
     Serial Number: 9XG0MW8V            
     Model: ATA     MM1000EBKAF     
     SATA NCQ Capable: True
     SATA NCQ Enabled: True
     Current Temperature (C): 27
     Maximum Temperature (C): 52
     PHY Count: 1
     PHY Transfer Rate: 3.0Gbps