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OC VR Design on Legacy Platforms
• In current generation platforms, CPU VRs are on the
motherboard
• Often, a separate VR exists for each rail to the CPU
• Voltage margining is accomplished using platform VRs
V
CORE
CPU
V
PLL
V
GFX
V
IO
V
SA
External VRs External VRs
4th Generation Intel
®
Core
™
processor
changes this dramatically with integrated
voltage regulation