OCZ Agility 3 SSD has a link speed of 1.5 Gbps in Kubuntu 12.10

Question

I have a couple of drives installed. A standard 7200rpm hard drive is reporting a link speed of 3 Gbps in dmesg. The Agility 3 SSD is reporting 1.5Gbps.

Using hdparm gives the following results:

Agility 3 SSD:
 Timing cached reads:   2420 MB in  2.00 seconds = 1210.77 MB/sec
 Timing buffered disk reads: 376 MB in  3.01 seconds = 124.84 MB/sec

Standard HD:
 Timing cached reads:   2236 MB in  2.00 seconds = 1118.90 MB/sec
 Timing buffered disk reads: 596 MB in  3.01 seconds = 198.20 MB/sec

So the OCZ Agility 3 SSD is way under-performing.

Does anyone know how to get the link speed up to 3Gbps?

Here is the stuff from dmesg for the SSD:

[    1.333084] ata3: SATA max UDMA/133 cmd 0xa400 ctl 0xa800 bmdma 0xb400 irq 21
[    1.800036] ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    1.824526] ata3.00: ATA-8: OCZ-AGILITY3, 2.22, max UDMA/133
[    1.824530] ata3.00: 117231408 sectors, multi 16: LBA48 NCQ (depth 31/32)
[    1.856479] ata3.00: configured for UDMA/133