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DDR
Cores
Last Level Cache
System
Agent
PCIe
*
DMI
pGfx
DDR Ratios
Core
Turbo
Ratios
†
Next Generation Intel Haswell Microarchitecture
Available Performance Tuning Ratios
• 266MHz Steps
up to 2933MHz
• 200MHz steps
up to 2800MHz
• Timing
Overrides
• Manual or can
be automated
through XMP
1.3
• Core ratios up
to 80
• Unlocked Turbo
Limits
• Current Limit
Override
• Graphics ratios
up to 60
pGfx
Ratios
†
PEG
DMI
Ratios
Ring
Ratios
†
PEG, DMI
Ratios
• BIOS sets based on requested BCLK f
•
100MHz: 80/50 (PEG/DMI Ratios)
• 125MHz: 64/40
• 167MHz: 48/30
• Ring Ratios up
to 80
• Ring Ratio
typically <=
Core or GT
† = Changeable at OS Level
Ring
PCIe* = PCI Express
*