Next Generation Intel Haswell Microarchitecture
Available Performance Tuning Ratios
Core
Turbo
Ratios†
•Core ratios up to 80
•Unlocked Turbo Limits
•Current Limit Override
•Graphics ratios up to 60
pGfx
Ratios†
Cores
Last Level Cache
pGfx
Ring
DDR
System
Agent
PCIe*
DMI
PEG
DMI
Ratios
DDR Ratios
•266MHz Steps up to 2933MHz
•200MHz steps up to 2800MHz
•Timing Overrides
•Manual or can be automated through XMP 1.3
Ring
Ratios†
| • BIOS sets based on requested BCLK f | ||
PEG, DMI | • | 100MHz: 80/50 | (PEG/DMI Ratios) |
Ratios | • | 125MHz: 64/40 |
|
| • | 167MHz: 48/30 | † = Changeable at OS Level |
•Ring Ratios up to 80
•Ring Ratio typically <= Core or GT
22PCIe* = PCI Express*