MSI NVIDIA MS-7504PV - Manual (Page 49)

3-21
BIOS Setup
DDR Memory Timing By SPD
Setting to [Enabled] enables DRAM CAS# Latency automatically to be determined
by BIOS based on the configurations on the SPD (Serial Presence Detect) EEP
ROM on the DRAM module.
Spread Spectrum
When the motherboard’s clock generator pulses, the extreme values (spikes) of the
pulses create EMI (Electromagnetic Interference). The Spread Spectrum function
reduces the EMI generated by modulating the pulses so that the spikes of the pulses
are reduced to flatter curves.