Asus M2N32-SLI Premium VISTA Edition - Manual (Page 98)

4-28 Chapter 4: BIOS setup
SB-->NB HT Speed [5xSB to NB HT Frequency]
Allows you to set the Southbridge to Northbridge HT Speed.
Configuration options: [1xSB to NB HT Frequency] [2xSB to NB HT Frequency]
[3xSB to NB HT Frequency] [4xSB to NB HT Frequency]
[5xSB to NB HT Frequency]
CPU<->NB HT Width [↓16 ↑16]
Allows you to set the CPU to Northbridge HT width.
Configuration options: [↓8 ↑8] [↓16 ↑16]
NB<->SB HT Width [↓16 ↑16]
Allows you to set the Northbridge to Southbridge HT width.
Configuration options: [↓4 ↑4] [↓8 ↑8] [↓16 ↑16]
NVIDIA GPU Ex [Disabled]
Allows you to enable the optimized Nvidia ® Ex graphics driver.
Configuration options: [Auto] [Disabled]