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Thread Starter 
Hello everyone, I hope I'm posting in the right section of these forums, but I really need your help!

Relevant rig specs: Mobo: Gigabyte P35-DS3L v2.0 (all latest updates installed), OS: WinXP x86, HDD (connected to the card): TOSHIBA PH3200U-1I72 2TB 7200 RPM RPM 64MB Cache SATA 6.0Gb/s 3.5"

I've purchased a SYBA SY-PEX40039 PCI-Express 2.0 SATA III card last week, along with a Toshiba 2TB 3.5" 7200RPM internal hd. I've tested the HD for bad sectors before anything else, using reliable tools before formatting and aligning for best performance.

However, when I tried to transfer any files to the drive, the speeds was horrible (4-9MB/s MAX) from all 3 of the hard drives I've connected to the onboard SATA2 ICH9 controller. The onboard drives are: WD 300GB Velociraptor, WD 1TB Black & Samsung 1TB F1.

I've installed the SY-PEX40039 into both available PCI-E v1.0 x1 slots (I tried them both), and the result is always the same, maximum file transfers get no higher than 9.5 MB/s, I've tried both ports to no avail. I've updated the drivers for the card to the latest version, I made sure the drive is properly aligned. I've connected the hard drive directly to an onboard SATA2 slot, and the speeds were 80+ MB/s right off the bat. I've tried file xfers from all my drives as well, it always maxes out at 9.5 MB/s whenever the Toshiba is connected to the SY-PEX40039 card.

I've just about run out of options of what to try next, and please don't tell me its the limitation of having a PCI-E v1.0 x1 slot, because that kinda speed is even worse than USB 2.0 speeds. I'm pretty disappointed with this card so far, the only reason I even bought it was to use it with this drive since all my other drives are SATA2s.

I also can't seem to find anyone else having this same problem so I'm quite lost over here, I've been reading these forums since 2008, but this is the first time I'm asking you all for help because I just about tried everything I could think of to resolve the issue (short of asking for a refund).