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- May 12, 2006
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| System Name | Apple Bite |
|---|---|
| Processor | Intel I5 |
| Motherboard | Apple |
| Memory | 40gb of DDR 4 2700 |
| Video Card(s) | ATI Radeon 500 |
| Storage | Fusion Drive 1 TB |
| Display(s) | 27 Inch IMac late 2017 |
Mine does 4.4ghz at 1.26-1.27v. It does not seem to be the greatest chip ever, but I was wondering if this is an average overclock on air . Mine does very well on the lower end but needs about 1.35v to get truly stable at 4.5ghz and that seems a bit high from what I have been reading. I have only had this chip a few weeks. I have my cstates on and load line is on extreme and all the other setting are set right per the guides I have read. From what I read, most chips do 4.3 to 4.6 from 1.8v to 1.32v depending on the chip and cooling.
The guide I used. Its a sandy guide but it still applies.
https://hardforum.com/threads/official-asus-p8p67-series-overclocking-guide-and-
information.1578110/
Excerpt:
4.7GHz or Below
All bios values to Auto except for those noted-
CPU Turbo Multiplier
Dram Voltage to specification
Internal testing has shown Auto Values will allow for stability in all forms of testing including high synthetic high load applications (Linx, Prime95, Occt ). In the event general stability is not achieved in these synthetic high load applications, you can adjust the noted values for improved stability.
Digi + VRM options
VRM frequency to 350 Requires setting to manual adjustment and entering the specified value.
4.7GHz and above
CPU Turbo Multiplier To desired value
Dram Voltage to specification
Digi + VRM options
VRM Frequency change to 350 this value will allow for scaling to 50+ multi without issues
Phase Control change to extreme this value will allow for scaling to 50+ multi without issues
Duty Control change to extreme - this value will for scaling to 50+ multi without issues.
No other values need to be changed. Unless otherwise noted all other UEFI values used are AUTO.
K series overclocking and its affect on subsystem performance especially HD performance
Quick note regarding options that can affect subsystem performance
It is NOT advised to make adjustments to Cstates as this can considerably affect hard drive throughput performance ( especially SATA6G SSD or Sandforce 2 based SSD ). It is recommended that all CPU power configuration states be left on their default parameters. Overclocking tests have shown internally no increase in multiplier scaling when adjusting these values. * under special cases with high multi capable CPUs and synthetic high load applications ( Linx, Prime, Occt ) it may required C states to be disabled. This has generally only been confirmed for some 51-54 multi capable CPUs.
K series overclocking benefits from adjustments to Digi+ VRM options
Advanced Digi+ VRM options recommendations
VCCSA
This has shown in internal testing not to improve overclocking, yet may still maintain the same level of stability while being lowered from its default value in order to keep the CPU cooler.
VCCIO
The adjustment of this voltage may help to slightly improve the overclocking capability of the IMC / DRAM, even though the default voltage is enough to run at a 2133MHz DRAM frequency. A 1.20v setting is more than adequate to maximize Memory overclocks in most cases.
CPU PLL
This setting did not improve overclocking, yet the user can maintain the same level of stability while lowering its default value in order to keep the CPU cooler.
PCH Voltage
This setting did not improve overclocking, yet the user can maintain the same level of stability while lowering its default value in order to keep the CPU/PCH cooler.
PCH PLL
This setting did not improve overclocking, yet the user can maintain the same level of stability while lowering its default value in order to keep the CPU/PCH cooler.
K series overclocking and how BCLK is affected and how to best optimize BCLK scaling
Quick Note for BCLK tuning
BCLK clocking is considerably reduced with this new CPU architecture and as such it is recommended to focus on Turbo Multiplier adjustments for overclocking. With that noted should you choose to make adjustments to the BCLK, ASUS has enabled extensive control to maximizing scaling.
Internal testing shows BCLK ranges from 102 to 109.1 with the largest level of scaling dependency placed on the quality of the CPU. CPU Frequency and speed is also directly tied to BCLK scaling. Internally we know that BCLK tuning largely depends on the CPU with approximately but we have noticed up to a 20% dependency on scaling potential based on the board design and PWM utilized.
At 4.9GHz, generally the maximum clock speed will not change with a different combination of multi and bclk in this particular example.
Example-
100x49 = 4.9GHz
103x48 = 4.9xxGHz
Generally the CPU will not do much more than what your maximum CPU multiplier range is in most cases. Keeping this in mind, we offer very fine adjustments down to 0.1x increments to allow for the maximum BCLK tuning.
The guide I used. Its a sandy guide but it still applies.
https://hardforum.com/threads/official-asus-p8p67-series-overclocking-guide-and-
information.1578110/
Excerpt:
4.7GHz or Below
All bios values to Auto except for those noted-
CPU Turbo Multiplier
Dram Voltage to specification
Internal testing has shown Auto Values will allow for stability in all forms of testing including high synthetic high load applications (Linx, Prime95, Occt ). In the event general stability is not achieved in these synthetic high load applications, you can adjust the noted values for improved stability.
Digi + VRM options
VRM frequency to 350 Requires setting to manual adjustment and entering the specified value.
4.7GHz and above
CPU Turbo Multiplier To desired value
Dram Voltage to specification
Digi + VRM options
VRM Frequency change to 350 this value will allow for scaling to 50+ multi without issues
Phase Control change to extreme this value will allow for scaling to 50+ multi without issues
Duty Control change to extreme - this value will for scaling to 50+ multi without issues.
No other values need to be changed. Unless otherwise noted all other UEFI values used are AUTO.
K series overclocking and its affect on subsystem performance especially HD performance
Quick note regarding options that can affect subsystem performance
It is NOT advised to make adjustments to Cstates as this can considerably affect hard drive throughput performance ( especially SATA6G SSD or Sandforce 2 based SSD ). It is recommended that all CPU power configuration states be left on their default parameters. Overclocking tests have shown internally no increase in multiplier scaling when adjusting these values. * under special cases with high multi capable CPUs and synthetic high load applications ( Linx, Prime, Occt ) it may required C states to be disabled. This has generally only been confirmed for some 51-54 multi capable CPUs.
K series overclocking benefits from adjustments to Digi+ VRM options
Advanced Digi+ VRM options recommendations
VCCSA
This has shown in internal testing not to improve overclocking, yet may still maintain the same level of stability while being lowered from its default value in order to keep the CPU cooler.
VCCIO
The adjustment of this voltage may help to slightly improve the overclocking capability of the IMC / DRAM, even though the default voltage is enough to run at a 2133MHz DRAM frequency. A 1.20v setting is more than adequate to maximize Memory overclocks in most cases.
CPU PLL
This setting did not improve overclocking, yet the user can maintain the same level of stability while lowering its default value in order to keep the CPU cooler.
PCH Voltage
This setting did not improve overclocking, yet the user can maintain the same level of stability while lowering its default value in order to keep the CPU/PCH cooler.
PCH PLL
This setting did not improve overclocking, yet the user can maintain the same level of stability while lowering its default value in order to keep the CPU/PCH cooler.
K series overclocking and how BCLK is affected and how to best optimize BCLK scaling
Quick Note for BCLK tuning
BCLK clocking is considerably reduced with this new CPU architecture and as such it is recommended to focus on Turbo Multiplier adjustments for overclocking. With that noted should you choose to make adjustments to the BCLK, ASUS has enabled extensive control to maximizing scaling.
Internal testing shows BCLK ranges from 102 to 109.1 with the largest level of scaling dependency placed on the quality of the CPU. CPU Frequency and speed is also directly tied to BCLK scaling. Internally we know that BCLK tuning largely depends on the CPU with approximately but we have noticed up to a 20% dependency on scaling potential based on the board design and PWM utilized.
At 4.9GHz, generally the maximum clock speed will not change with a different combination of multi and bclk in this particular example.
Example-
100x49 = 4.9GHz
103x48 = 4.9xxGHz
Generally the CPU will not do much more than what your maximum CPU multiplier range is in most cases. Keeping this in mind, we offer very fine adjustments down to 0.1x increments to allow for the maximum BCLK tuning.
Last edited:
