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ProKoN

Intel Haswell 4670k + 4770K Overclocking guide

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Posted · Original PosterOP

Finding Best CPU Frequency
  

   •Install the latest official bios

Clear cmos
Change cpu multiplier to 44
Change cpu vcore voltage to 1.25V
Change VCCIN voltage to 1.9V (processor input voltage PIV)
Set your ram @ 1333MHz/ Set memory Voltage to 1.5V
Boot and stress test with the IETU
 
 
Stability Testing
 
 
A Great way to judge stability and see how well your system is performing is to run cinebench and XTU Benchmark
 
 
If you can run 5-6 passes back to back your typically fairly stable.
 
 
 
The following Tests require you to set your Vcore mode to manual! Failing to do so will most certainly result in overvolting \overheating and throttling. These tests may aid you in reducing time spent stability testing
 
XTU-Benchmark (good suggestion is to run this a few times to gauge stability)
 
 
 
 
 

 

 

 

 

 

    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

 

 

 

 


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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Posted · Original PosterOP

A summary of my Overclocking journey

Before The Delid

2p0n.png

2tv.png

After The Delid


Finally stable at 4.7GHz (had to delid to achieve this on air) stable for 12 hours.

4.7GHZ@1.41V max temp 89c average temp 78c

]oq1.png

I finally found stability with the cache ratio. I am very Happy with this overclock.

I am stable for 10 hours at 4.7GHz with a 4500MHz ring bus frequency.

1.41V max temp 84c

PIV- 1.9V

CPU cache voltage- 1.3V

I dropped my memory down to 1333 for cpu stability testing. currently working on bringing the memory frequencies back up.

t0v6.png

tvu.png


12 hours stable at 4.7GHz with mem chips at 2600MHz (relaxed timings)

6icn.png

very close to achieving stabilitity at 4.6GHz with a 4600MHz ring bus 1:1 ratio

ran for 9 hours, then crashed....very very close.

apsy.png

4770k

4.7GHz @ 1.41v

4500MHz ring bus

2400MHz Memory

Stable\Validated overclock

8lry.png

 

 


4.8GHz @ 1.48V

4500MHz ring bus

2400MHz Memory

overclock is NOT STABLE Nor is it Validated but good fun none the less! My highest scores yet

 

yqj.png

 

 

4670K no delid (yet)

 

1st stable run at 4.8GHz, 22 hours. Working on lowering voltages and then pushing for a stable 4.9GHz

 

01ja.png

 

Final 4670k 24\7 Overclock results 4.8GHz ( not AVX stable)

 

Bclk-100

Cpu multi-48

Cpu ring multi-45

PIV- 2.07V

CPU Vcore- 1.34V

CPU ring bus voltage-1.4V

Memory- 2400MHz cl 11  @ 1.71V

 

nerv.png

 


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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Posted · Original PosterOP

4.8Ghz @ 0.976V? What kind of black magic is this.

Please disregard any voltage you see from CPUz

 

Glitch in the program, sorry

 

The IETU shows accurate Voltage's

 

4.8GHz i need 1.48V :(

 

and still No real stability found, only with the ring bus set at 800 mhz i was able to stress test overnight at 4.8GHz @ 1.48V :(

 

Thanks for pointing that out, i made an edit to ensure the best possible accuracy.


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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Finding Best CPU Frequency

  

   •Install the latest official bios

Clear cmos
Change cpu multiplier to 44
Change cpu vcore voltage to 1.25V
Change VCCIN voltage to 1.9V (processor input voltage PIV)
Set your ram @ 1333MHz/ Set memory Voltage to 1.5V
Boot and stress test with the IETU
 
 

Just done this and windows 7 froze at login screen!


I5 4670k | 7870 Tahiti LE | 1600MHz 2x4GB

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Posted · Original PosterOP

begin by increasing your vcore in .01 increments

 

if you hit 1.3V and no luck, drop your cpu RING multiplier down to 30, try again.

 

make sure you set your ram to 1333 @ 1.5V


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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Posted · Original PosterOP

Just done this and windows 7 froze at login screen!

also take the time and watch the videos i posted, they are dry, grab a cold one, but I included little bits of useful info in there


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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Didnt work for me, I'm just getting bluescreens every fifth minute or so.

1.27=instans bluscreen

1.28=1 minute inside Windows

1.29= 5 minutes in Windows

What should i do?

Can i increase to 1.3 or should i decrease to 4.3 GHz?

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Didnt work for me, I'm just getting bluescreens every fifth minute or so.

1.27=instans bluscreen

1.28=1 minute inside Windows

1.29= 5 minutes in Windows

What should i do?

Can i increase to 1.3 or should i decrease to 4.3 GHz?

incerease to 1.3

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Didnt work for me, I'm just getting bluescreens every fifth minute or so.

1.27=instans bluscreen

1.28=1 minute inside Windows

1.29= 5 minutes in Windows

What should i do?

Can i increase to 1.3 or should i decrease to 4.3 GHz?

here is your answer.

 

begin by increasing your vcore in .01 increments

 

if you hit 1.3V and no luck, drop your cpu RING multiplier down to 30, try again.

 

make sure you set your ram to 1333 @ 1.5V


Spoiler

CPU: R5 1600 @ 4.2 GHz; GPU: Asus STRIX & Gigabyte g1 GTX 1070 SLI; RAM: 16 GB Corsair vengeance 3200 MHz ; Mobo: Asrock Taichi x470; SSD: 512 gb Samsung 950 Pro Storage: 5x Seagate 2TB drives; 1x 2TB WD PurplePSU: 700 Watt Huntkey; Peripherals: Acer S277HK 4K Monitor; Logitech G502 gaming mouse; Corsair K95 Mechanical keyboard; 5.1 Logitech x530 sound system

 01000010 01101001 01101110 01100001 01110010 01111001 00100000 01100100 01101111 01100101 01110011 01101110 00100111 01110100 00100000 01101101 01100001 01101011 01100101 00100000 01111001 01101111 01110101 00100000 01110000 01110010 01101111 00101110

 

 

 

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Posted · Original PosterOP

Didnt work for me, I'm just getting bluescreens every fifth minute or so.

1.27=instans bluscreen

1.28=1 minute inside Windows

1.29= 5 minutes in Windows

What should i do?

Can i increase to 1.3 or should i decrease to 4.3 GHz?

what are your temps at 1.29V?

 

if you have have thermal headroom ( your below 85-90c max)

 

do as Tonny suggested and begin increasing voltage. you have a good cooler. 1.3, 1.31, 1.32 etc

 

 

once you run out of thermal headroom and you reach max temps do as Cryptonite suggested and drop the ring bus down and ENSURE your mem chips are @ 1333MHz 1.5V!


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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Posted · Original PosterOP

post a full screenshot with the ietu while stress testing so i know whats going on

 

see how i have the ietu configured to display voltages temps and all the proposed values, do the same.

 

t0v6.png


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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what are your temps at 1.29V?

 

if you have have thermal headroom ( your below 85-90c max)

 

do as Tonny suggested and begin increasing voltage. you have a good cooler. 1.3, 1.31, 1.32 etc

 

 

once you run out of thermal headroom and you reach max temps do as Cryptonite suggested and drop the ring bus down and ENSURE your mem chips are @ 1333MHz 1.5V!

I forgot to take his temperatures into account.


Spoiler

CPU: R5 1600 @ 4.2 GHz; GPU: Asus STRIX & Gigabyte g1 GTX 1070 SLI; RAM: 16 GB Corsair vengeance 3200 MHz ; Mobo: Asrock Taichi x470; SSD: 512 gb Samsung 950 Pro Storage: 5x Seagate 2TB drives; 1x 2TB WD PurplePSU: 700 Watt Huntkey; Peripherals: Acer S277HK 4K Monitor; Logitech G502 gaming mouse; Corsair K95 Mechanical keyboard; 5.1 Logitech x530 sound system

 01000010 01101001 01101110 01100001 01110010 01111001 00100000 01100100 01101111 01100101 01110011 01101110 00100111 01110100 00100000 01101101 01100001 01101011 01100101 00100000 01111001 01101111 01110101 00100000 01110000 01110010 01101111 00101110

 

 

 

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what are your temps at 1.29V?

 

if you have have thermal headroom ( your below 85-90c max)

 

do as Tonny suggested and begin increasing voltage. you have a good cooler. 1.3, 1.31, 1.32 etc

 

 

once you run out of thermal headroom and you reach max temps do as Cryptonite suggested and drop the ring bus down and ENSURE your mem chips are @ 1333MHz 1.5V!

Well i cant test my temp because i Get bluescreens too quickly, so i don't have time too test. Bit i have a 240mm aio luiquid cooler so i should not have very warm tempo

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Well i cant test my temp because i Get bluescreens too quickly, so i don't have time too test. Bit i have a 240mm aio luiquid cooler so i should not have very warm tempo

Then do what ProKoN said.


Spoiler

CPU: R5 1600 @ 4.2 GHz; GPU: Asus STRIX & Gigabyte g1 GTX 1070 SLI; RAM: 16 GB Corsair vengeance 3200 MHz ; Mobo: Asrock Taichi x470; SSD: 512 gb Samsung 950 Pro Storage: 5x Seagate 2TB drives; 1x 2TB WD PurplePSU: 700 Watt Huntkey; Peripherals: Acer S277HK 4K Monitor; Logitech G502 gaming mouse; Corsair K95 Mechanical keyboard; 5.1 Logitech x530 sound system

 01000010 01101001 01101110 01100001 01110010 01111001 00100000 01100100 01101111 01100101 01110011 01101110 00100111 01110100 00100000 01101101 01100001 01101011 01100101 00100000 01111001 01101111 01110101 00100000 01110000 01110010 01101111 00101110

 

 

 

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Posted · Original PosterOP

Didnt work for me, I'm just getting bluescreens every fifth minute or so.

1.29= 5 minutes in Windows

 

well it would seem you have 5 minutes of stability at 1.29V thats enough time to capture a screenshot and to get an idea of your temps.


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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Posted · Original PosterOP

I nominate you to be on the intel response squad

http://www.youtube.com/watch?v=zotLLNmduJI


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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I'm using your guide to OC my 4770k on my Asus Formula board. Asus likes to be all cool with their ROG line and make a billion sub menus and change the name of stuff slightly... It doesn't have anything specifically named VCCIN Voltage.

Instead they have "Initial CPU Input Voltage" in the main voltage menu (selected item in first pic. The description of the selected item is on the upper right side of the screen and it says VCCIN).

Then in the Digi+ Power Control submenu they have "VCCIN MOS Volt Control" (second pic).

Then in the Tweakers Paradise submenu they have "VCCIN Shadow Voltage" (third pic)

So when you say to set VCCIN to 1.9, which of those are you talking about?

Edit: you can see all the bios screens that have to do with over clocking here:

http://rog.asus.com/forum/showthread.php?33488-Maximus-VI-Series-UEFI-Guide-for-Overclocking&country=&status=

post-7022-0-58022400-1376753145.jpg

post-7022-0-72757200-1376753333.jpg

post-7022-0-22837400-1376753512.jpg


Gigabyte Z87X-UD4H | 4770k 4.6GHz | Corsair Dominator Platinum 1866 16GB | Zotac ArcticStorm GTX 1080 Ti | Samsung 840 Pro 256GB | OCZ Agility 3 480GB | ADATA SP550 960 GB

Corsair AX860i | CaseLabs SM8 | EK Supremacy | UT60 420 | ST30 360 | ST30 240

Gentle Typhoon's and Noctua's and Noiseblocker eLoop's

 

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Posted · Original PosterOP

I'm using your guide to OC my 4770k on my Asus Formula board. Asus likes to be all cool with their ROG line and make a billion sub menus and change the name of stuff slightly... It doesn't have anything specifically named VCCIN Voltage.

Instead they have "Initial CPU Input Voltage" in the main voltage menu (selected item in first pic. The description of the selected item is on the upper right side of the screen and it says VCCIN).

Then in the Digi+ Power Control submenu they have "VCCIN MOS Volt Control" (second pic).

Then in the Tweakers Paradise submenu they have "VCCIN Shadow Voltage" (third pic)

So when you say to set VCCIN to 1.9, which of those are you talking about?

Edit: you can see all the bios screens that have to do with over clocking here:

http://rog.asus.com/forum/showthread.php?33488-Maximus-VI-Series-UEFI-Guide-for-Overclocking&country=&status=

 

 

In your asus uefi the Processor Input voltage is

 

 

Initial CPU Input Voltage - set this for 1.9V

 

 

 

Leave the other two items you mentioned set to auto.


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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Posted · Original PosterOP

the ietu will display your processor input voltage on the right hand side so you can confirm the value

 

gi0f.png

 


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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Should I still use 1.9 if I'm aiming for a 4.2 OC? I haven't done 8 hours of stability testing yet, but I can do 4.2 at 1.7 volts for 10 mins. Should I still 1.9 for the 8 hour stability test?


Gigabyte Z87X-UD4H | 4770k 4.6GHz | Corsair Dominator Platinum 1866 16GB | Zotac ArcticStorm GTX 1080 Ti | Samsung 840 Pro 256GB | OCZ Agility 3 480GB | ADATA SP550 960 GB

Corsair AX860i | CaseLabs SM8 | EK Supremacy | UT60 420 | ST30 360 | ST30 240

Gentle Typhoon's and Noctua's and Noiseblocker eLoop's

 

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Posted · Original PosterOP

honestly for most overclocks you can leave this set for auto , it is really going to be a factor when increasing the cpu ring bus as pushing past 3900MHz ring bus usually requires increasing this value

 

i do believe most manufactures set a default PIV between 1.72-1.788 Volts

 

if your still on part 1 of the guide and are not trying to find ring bus stability yet, you can leave it set for auto or set it for 1.9V, the choice is yours

 

when you get to part 2 thats when you need to bring the PIV voltage up in order to find the best ring bus stability. my lowest overclock was 4.4GHz and I had to raise the PIV to 1.9V in order to achieve ring bus stability at a 1:1 ratio, I never tried any lower frequency, so please post your results if your looking to overclock at 4.3GHz or lower.


Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King

 

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