GTL REF & VTT Voltage Settings - X48 LT-UT.
Important Update -
All tables updated and fixed 09/04/2008 - If you notice any errors, please let me know.
New Beta BIOS available, PM me and I will send it to you.
Here are the
GTL REF and
VTT Voltage settings for the DFI LT/UT X48.
The table below shows a few examples of the correct
GTL REF for a given
VTT (GTL REF=67% of VTT).
To find the correct
GTL Ref Voltage for your setup, simply find the
VTT that you require from the table below, and then match the corresponding colour from the
VTT tables below that.
An example of this would be that you need 1.250v
VTT, as you can see that is colour coded green, scroll down the
VTT tables until you find a green coloured section, and that is it - easy
The colour coding is there for ease of use and not all possibilities are colour coded, but it is straight forward enough. If you get stuck, please ask.
The next table shows the difference between the voltage set in the BIOS and the actual voltage that is applied - This is just an example and is based on having a 45nm CPU fitted, but the same principle applies for 65nm as well.
Table of VTT1.06V
Table of VTT1.20V
Table of VTT1.30V
Table of VTT1.40V
Table of VTT1.50V
Table of VTT1.55V
Thanks to Jimmy & Jarry @ DFI for the info and thanks to John for the file