Intel Motherboards : SM951 AHCI 512GB performance in Win7

Author: parsec
Subject: SM951 AHCI 512GB performance in Win7
Posted: 27 Aug 2016 at 10:23pm

wardog wrote: parsec wrote: I believe MSoft changed to storahci in Windows 8 or 8.1. Interesting they did not change it in Server 2012 R2, They did change it in 2012 R2 https://msdn.microsoft.com/en-us/library/windows/desktop/hh848066(v=vs.85).aspx This laptop I'm typing on could I guess support a 1 CPU VM, yet I'm not foolishly going to attempt it. Bring it to its knees it would with an 2012 R2 VM. I have a hunch that what the OP is seeing is solely the way a VM might configure that driver, being virtualized as is is.

Well there you go! It seemed strange to me that MSoft would not change their AHCI driver across all their products, but I was going by what the OP said.

That is, if it really was a change, since the date of storahci is shown as 6/21/2006. That is from a Windows 10 installation. I really don't think we had Windows 8 in 2006.

Now why or how a VM could change the AHCI driver is the next question, if that even happened.

But I think I see where msahci came from. If the AS SSD benchmark was run on the Windows 7 partition of the SM951, then msahci would be the driver used for an SM951.

The Server 2012 R2 partition should use storahci, but maybe it was not replaced or loaded when it boots? If not, you might be able to change to storahci from Server 2012 by doing the manual driver update in Device Manager.