•Stress test for a minimum 8 hours
•Increase voltage if the system crashes Decrease if stable
•I don’t recommend more than 1.32V for 4.4GHz
•You may need anywhere from 1.2, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, 1.3, 1.31, 1.32V
•Do NOT EXCEED 1.5V For any typical Overclock
•Temps should Not Exceed 85c-90c Maximum
*Tip- If your having issues finding cpu stability at any cpu frequency Drop the ring ratio down to 3000MHz
Acceptable Cpu voltages
0V-1.3V For people concerned about volts\heat. up to 1.3V is playing it SAFE. be happy with your clocks at 1.3V. using an air cooler. I have found that up to 1.3V will offer the best performance ratio in terms of GHz\Watt
1.3V-1.44V Still safe without risking CPU degradation . Requires a good cooling solution ( top notch AIO cooler) NOT recommended for people using air cooling or people concerned with heat or volts applied
1.45V and Higher. For extreme Overclockers only. from my testing going over 1.45V to achieve higher clock speeds is pointless. the performance\Watt drops heavily and massive amounts of heat is generated.Not Recommended
Pushing Past 4.4GHz
My best Stable results so far
•4.6GHz @ 1.35V
•4500MHz ring bus @ 1.32V
•VCCIN 1.9V
•4.7GHz @ 1.41V
•4600MHz ring bus @ 1.41V
•VCCIN 2.0V
CPU Ring Bus Stability
•Our goal is to Increase the CPU ring bus to a 1:1 ratio example
•4.4GHz CPU frequency
•4.4GHz ( I prefer to refer to the ring bus in MHz so 4400MHz)
•Not all Cpu’s can achieve a 1:1 Ratio while overclocking
•Finding Ring Bus stability is Time Consuming
•Set your ring bus multiplier for a 1:1 ratio. We set it to 44 (4400MHz) to maintain a 1:1 Ratio with our 4.4GHz overclock
•Set your VCCIN to 1.9V
•Set your cpu ring voltage to whatever cpu vcore voltage you found stability with
•Example if you found stable cpu results @ 4.4GHz -1.28V
•Set your cpu ring voltage for 1.28V
•Boot and stress test
•You need a minimum of 8 hours stable before we can proceed
•If you are stable great!
•Begin reducing your VCCIN voltages until you become unstable, use the vccin voltage at the last stable setting. Default vccin is 1.75-1.78V on most boards.
•Begin reducing your cpu ring bus voltages until you become unstable, use the voltage at the last stable setting.
If you have not found stability
•Begin Increasing your VCCIN Voltage in .001 increments
•1.9. 1.901, 1.902, 1.903, 1.904, 1.905, 1.906, 1.907, 1.908, 1.909, 2.0, 2.01, 2.02, 2.03, etc
•In the real world 2.1V is maximum
•Do not exceed 2.1V-2.2V
If unsuccessful set your vccin voltage for 2.0V and begin to reduce the ring bus ratio until your stable 43,42,41
Example
•4.4GHz Cpu frequency
•4200MHz ring bus
•After you find the best possible ring bus frequency stable for 8 hours begin to reduce the voltages
•Begin reducing your VCCIN voltages until you become unstable, use the vccin voltage at the last stable setting. Default vccin is 1.75-1.78V on most boards.
•Begin reducing your cpu ring bus voltages until you become unstable, use the voltage at the last stable setting.
Maximum Recommended CPU Ring Bus Voltage - 1.4V
I have gone as high as 1.45V on the cpu ring bus voltage without any issues
My Best Validated Ring bus Results
•4.4GHz @ 1.23V CPU
•4400MHz @ 1.22V Cpu Ring Bus
•VCCIN 1.9V
•4.6GHz @ 1.35V CPU
•4500MHz @ 1.3V Cpu Ring Bus
•VCCIN 1.9V
•4.7GHz @ 1.41V
•4600MHz ring bus @ 1.41V
•VCCIN 2.0V
Finding Memory Stability
•Cpu Frequency is king. Obtain best CPU clocks first. Sacrifice Memory speed if you have to, not CPU speed
•XMP Profiles can be MISLEADING
•Little to no real world benefit from memory overclocking.
•In my opinion Tighter Timings are more beneficial than Higher Frequencies because lower frequencies typically require less voltage
•Xmp profiles change memory speed, timings, voltages
•Most Memory Manufactures will only officially support the Jdec standard NOT XMP profiles.
•XMP profiles are technically considered overclocking
•Set your memory frequency to “auto”
•Set your memory Dram timing configuration to “auto”
•Set your memory Dram Voltage to “auto”
•Load desired XMP Profile
•Boot and stress test with the IETU memory stress test. ( your temps may be slightly higher than the regular cpu stress test, that’s ok)
•The IETU is not the best memory stress tester since it will only utilize around 3-4 GB of memory. It is still effective, however if you choose to stress test your memory with another preferred stress testing program be sure to set your cpu Vcore mode to “manual”
•Increase memory voltage manually
•Typically DDR3- 1600MHz requires 1.5V
•Typically DDR3- 1866MHz requires 1.65V
•Acceptable Voltage range for DDR3 is 1.3V-1.8V
•Maximum voltages for different kits. My suggestions are
If your kit calls for -1.35V do not exceed 1.6V
-1.50V do not exceed 1.7V
-1.65V do not exceed 1.8V
•Increase voltage in .1V increments until stable for a minimum of 8 hours. Eg-1.35V, 1.45V, 1.55V, 1.65V, 1.75V, 1.8V
•If stable drop the Dram voltage down .05V and check to see if it is stable for 8 hours.
•So what this means. If your ddr3 kit has a xmp profile of lets say 1600MHz @ 1.35V it may require as much as 1.5-1.6V to be stable. This is normal.
•My Kingston HyperX Beast 2x8GB DDR3-2400MHZ kit required 1.71V in order to be stable with the xmp 2400MHz profile loaded, the stock xmp profile suggested 1.65V
•If no luck at stock timings and frequencies after trying Voltages from 1.5V-1.8V
•Manually input stock frequencies and timings and voltage
• Example- 1600MHz 9-9-9-24 1T 1.5V
•Begin increasing voltage again
•Try to scale back your memory frequencies
•Example- drop your memory down from 2133MHz to 1866MHz.
•Contact your memory technical support and load the values they suggest before considering your units defective
Haswell Low Power Modes
•Make sure you are on the latest official Bios!
•Cpu ratio mode- Dynamic
•Enhanced Turbo- Enabled
•CPU core voltage mode- Adaptive
•CPU ring voltage mode- Adaptive
•Intel C-state – Enabled
•C1E Support- Enabled
•Package C-state limit - Auto
for windows users also make sure you set your minimum processor state to 5%
Windows7
->Control Panel\All Control Panel Items\Power Options\Edit Plan Settings
-->Change Advanced Power settings
--->Processor Power Management
---->Minimmum Processor state
-on battery 5%
-plugged in 5%
If your not having any luck with my guide, an alternative guide can be found here.
http://www.overclock...with-statistics