Official GIGABYTE Forum

Questions about GIGABYTE products => Motherboards with AMD processors => Topic started by: anders on January 25, 2011, 01:00:56 pm

Title: GA-890GPA-UD3H question
Post by: anders on January 25, 2011, 01:00:56 pm

Such a strange thing. I played a bit with the Linux dmidecode and I noticed that this program recognizes second (empty) PCIe slot,which should operate at x8 speeds, only as x4. Exported htm/txt file from CPU-Z says the same thing,see below:



DMI Extension Slot      
   designation      PCI Express x16
   type         A5

DMI Extension Slot      
   designation      PCI Express x4
   type         A5

DMI Extension Slot      
   designation      PCI Express x1
   type         A5

DMI Extension Slot      
   designation      PCI Express x1
   type         A5

DMI Extension Slot      
   designation      PCI Express x1
   type         A5



 First PCIe x16 slot is populated by graphic card (MSI N220GT) which is working correctly in x16 mode. BIOS settings are at defaults, no overclock or voltage correction. Is it somehow related to sharing bandwidth between pcie slots or power-saving functions or there´s something wrong? Just for curiosity...Thanks!

Title: Re: GA-890GPA-UD3H question
Post by: wizardB on January 25, 2011, 01:58:47 pm

I believe the 4x slot will speed up to 8x and the 16x slot slow down to 8x on insertion of a second video card ,at least that my understanding on hoe the PCI bridge works on this board.

Title: Re: GA-890GPA-UD3H question
Post by: anders on January 26, 2011, 06:09:02 pm

Okay, you're probably right, I also think it might work this way.   ;)