Dereck47 :
Your motherboard has 4 SATA ports. Two of the ports are SATA 1.0 (1.5Gb/s), and the other two are SATA 2.0 (3Gb/s).
You probably have your SSD connected to one of the SATA 1.0 ports (SATA_RAID1 or SATA_RAID2). With your SSD connected to one of these ports you will get maximum Read/Write speeds of 150MB/s.
Connect your SSD to port SATA1 or SATA2. See page 2-3 of your motherboard manual for the location of these ports.
Also, the port any SSD is connected to needs to be in AHCI mode for best performance.
Your motherboard does not support AHCI mode so that will reduce the performance of any SSD.
I thought so too but I downloaded Plextools for SSD's (it's mostly worthless drivel) and it shows that I'm getting 6GPS throughput on my SSD so I'm still confused. I made sure I had put the SSD in a SATA 3 port and used a SATA three cable. Here are my system specs. Should've posted this first!
SAMSUNG Black Blu-ray Combo SATA Model SH-B123L LightScribe Support - OEM
COOLER MASTER Silent Pro Gold Series 800W ATX 12V v2.3
XFX Double D Black Edition FX-777A-ZDB4 Radeon HD 7770 GHz Edition 1GB 128-bit GDDR5
G.SKILL Ares Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory
ASUS Sabertooth 990FX AM3+ AMD 990FX
AMD FX-4100 Zambezi 3.6GHz (3.8GHz Turbo) Socket AM3+ 95W Quad-Core Processor
Plextor 256 M3 256 MB SSD Hard Drive
Seagate Barracuda 3TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
Worf