SATA 3 not working on Asus P6X58D-E motherboard with SATA III support

Yesterday I had a PC technician around to see why my PC was not booting-up properly and also to change my SSD to a larger SSD. As I am visually challenged I cannot do hardware upgrades etc, so I got a Techie guy in.

We used Zinstall HDD by-the-way and I would highly recommend this application for such a job plus, it is extremely fast.

Anyway, while he was diagnosing my boot-up issue he discovered I had a malfunctioning network card; while removing this, he noticed all the SATA settings were set to SATA 2.

When he reset these to SATA 3, the PC would not start-up! When he set them again to SATA 2 there was no problem and it worked fine?

Can anyone illuminate me on this please?

Thanks for any/all imput

Many people have had issues with the Marvell controller on that MB.
You may want to live with SATA 3g/s. Easiest path, no real difference except for benchmarks, and no chance of data loss.
But in case you're not satisfied with that, here's something to look at.

AHCI-mode on Marvell 9128 controller in Windows 7 Ultimate x64

and

[Solved] ASUS P6x58D-E, Win 7 (64) Marvell AT 91xx - Asus - Motherboards-Memory
A fellow name Jaquith seems to know what's up.

Bottom line is you need the right drivers.

Thanks very much Victor, I really appreciate that. I will pass that on to the technition.

Thank you very much Hop along X, I really appreciate that. I thought all my drivers were up-to-date but maybe not.

Thanks again

Hopalong X said:

Go to the ASUS website to get the proper drivers for your mother board.

Here> ASUS - Motherboards- ASUS P6X58D-E

Enter your OS version and select the newest by date driver listed.

Listed under SATA. Version 1.0.0.1034 / 2010.03.25 update

Use the Global download button.

There's some question about that driver supporting TRIM.
The consensus is that it doesn't.
If that matters to the OP, he might choose to stay with the Win 7 drivers.
OTOH. his SSD controller might have garbage collection that can replace TRIM.
There's a lot dispute about this.
Personally, I would just go with TRIM support and forget about the increased speed gained by the Marvell driver. His next MB can have it it all. But it's his call.

These drivers seem to be dated before my PC was manufactured so surely they should be up-to-date?

Thank you guys