#1 AsRock G41M-VS3 R2.0 - Add AHCI or real SATA support by RaskaipikaFWR 27.07.2021 12:42

Hi forum:

A friend of mine tell me to take a look to his computer to see if it's possible to add AHCI support to the motherboard of his old PC. The PC has a Northbridge G41 and a Southbridge ICH7, the Option ROM present in the BIOS that controls the storage is a VID 8086 / DEV 27C3, the mainboard has an IDE connector and 4 SATA ports (The storage controller DEV ID is 27C0 at the device manager, not the 27C3).

The SATA ports 1 and 2 are the IDE primary channel, the SATA ports 3 and 4 are the IDE secondary channel and finally, the IDE connector is the IDE third channel.

I don't know if is possible to add AHCI support to this motherboard or at least, unlock hidden menus to see if the AHCI support is hiden and / or present, I say this because I've been taken a look to other motherboards BIOS with the same chipsets, and in those BIOS, there isn't a PCI Option ROM for the storage controller, but in this, yes, there is one, with the next parameters: VID 8086 / DEV 27C3.

Thanks in advance, I hope that, at least, you can tell me if this is possible, and if it's possible, how to do it.

Kind regards.

#2 RE: AsRock G41M-VS3 R2.0 - Add AHCI or real SATA support by boombastik 27.07.2021 16:53

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The ICH7 (Base) chip do not support AHCI. But he can use an ssd and the trim works as intended.

#3 RE: AsRock G41M-VS3 R2.0 - Add AHCI or real SATA support by RaskaipikaFWR 27.07.2021 20:15

Thanks for the tip @boombastik about the TRIM working with SSDs without AHCI support at the storage controller.

I've checked if the TRIM works and it works without problem and with a SSD ADATA SU-800 the read and write performance are great for a SATA II controller, both of them are 230 - 240 MB/s.

But, I don't understand why the BIOS include a MSM PCI OPROM (8086-27C3) but the BIOS doesn't use it, it's more, if I remove that PCI OPROM from the BIOS, the PC works without problems.

Is there any way to make use of the MSM PCI OPROM (8086-27C3) for make use of the AHCI feature that the MSM module include. Now I know that the SSDs work with TRIM support but I prefer use them at "100%".

#4 RE: AsRock G41M-VS3 R2.0 - Add AHCI or real SATA support by boombastik 27.07.2021 22:14

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@RaskaipikaFWR I believe that it is included because they use universal bios for a lot motherboards so a similar model motherboard that have ich7r can use ahci . In your situation it does not mater. So don't search for over complicated solutions.
Trim works and 230 MB/s is maximum that a sata 2 can provide.
Also from that era 2006 usually the ahci was buggy. Ich6-7 was the first chips that implemented ahci.

#5 RE: AsRock G41M-VS3 R2.0 - Add AHCI or real SATA support by RaskaipikaFWR 28.07.2021 14:56

@boombastik thanks again for your answer and support, you're right, if the ICH7 doesn't have the AHCI feature and with SSDs drives works well (for a SATA II storage controller, it depends directly from the SSD drive used in terms of velocity) with TRIM working on windows 10, there isn't reason to "search for over complicated solutions".

Well, I will say to my friend that his old PC is able to work with windows 10 and a SSD drive without problems, at least, 4 years more for this old PC.

Thanks again.

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