GIGABYTE AMD Socket AM2 Processor Motherboard GA-M59SLI-S5 - Manual (Page 22)

GA-M59SLI-S5/GA-M59SLI-S4 Motherboard - 22 -
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Graphics Card Driver Setting:
Step 1: After installing graphics card driver in operating system,
right-click the NVIDIA icon in your system tray and then
select NVIDIA Display. The NVIDIA control panel will
appear.
Step 2: Select SLI multi-GPU from the side menu and then
select the Enable SLI multi-GPU checkbox in the SLI
multi-GPU dialog box. System will restart after you
click Apply. Then the SLI configuration is completed.