About i5 4670k overclocking

[NirHahs]

I need to ask some question before i start to oc my cpu. What is the stable voltage for i5 4670k at 4.0ghz? And which mode should I use for voltage setting in asus mobo, adaptive or manual mode? Any other settings have to change to make it stable?

 

[Tweakin]

I need to ask some question before i start to oc my cpu. What is the stable voltage for i5 4670k at 4.0ghz? And which mode should I use for voltage setting in asus mobo, adaptive or manual mode? Any other settings have to change to make it stable?

The question you must first ask is "what is my default VID". Boot your system with defaults and see what your core voltage is before you even apply memory XMP profiles. This will help with your baseline.

Now, for my system and I have a dog chip in my opinion, I need 1.15 for 4.0 stable. I also run 1.24 for 4.2 stable operation. I'm at 1.38 for 4.4, unsure of stability as I won't run the system that long at that voltage as it's past my comfort zone.

The one thing we have learned about hasewell is that the chips are all over the place with regards to stable operation and voltage.

 

[NirHahs]

The question you must first ask is "what is my default VID". Boot your system with defaults and see what your core voltage is before you even apply memory XMP profiles. This will help with your baseline.



Now, for my system and I have a dog chip in my opinion, I need 1.15 for 4.0 stable. I also run 1.24 for 4.2 stable operation. I'm at 1.38 for 4.4, unsure of stability as I won't run the system that long at that voltage as it's past my comfort zone.



The one thing we have learned about hasewell is that the chips are all over the place with regards to stable operation and voltage.

Im sorry i couldnt understand on this can u pls explain me what is VID? XMP profile? I set all the core manually

 

[Ed1]

Im sorry i couldnt understand on this can u pls explain me what is VID? XMP profile? I set all the core manually

Download core temp to see VID voltages (this is a voltage table) , XMP is a ram profile many MB will default to 1300mhz , then you set XMP in bios and you get the profile memory STD supports .

If you only plan to go 4.0 ,you probably don't need much added voltage if any . I would run stock clocks have core temp open for vid and CPU-Z for core voltage and run prime95 for few mins noting VID and voltage at load .

Then just leave voltage on auto and try 40x multiplier and then see results from prime95 , noting the vid and voltage .

Then come back , for 4.0 i would say run either auto or adaptive depending on out come .

 

[Yuriman]

VID = voltage identifier

Every chip will have different voltage requirements at different clocks, the only way to find out what yours needs is to test for yourself.

As for how to set your voltage, "adaptive" sounds to me like a synonym for "offset" which is what most people recommend when overclocking. A simplified explanation is that CPUs have a voltage table which picks a voltage for a given clock speed, and an offset lets you add or subtract voltage from whatever the table recommends, rather than picking a set voltage (manual). This allows your chip to run at a lower voltage when it's not fully loaded and saves power.

 

[coffeejunkee]

I need to ask some question before i start to oc my cpu. What is the stable voltage for i5 4670k at 4.0ghz? And which mode should I use for voltage setting in asus mobo, adaptive or manual mode? Any other settings have to change to make it stable?

No one knows because every chip is different.

Adaptive is the best mode, except it will add extra voltage when running stresstests like linx/prime/aida etc. I would start with manual fixed mode to find a stable vcore, then change it to corresponding adaptive mode.

Plenty of other settings to change depending on how high you oc, but I would start with reading some haswell oc guides.

People here mention vid but it is not the same as the actual vcore displayed by cpu-z. Leave everything at stock, then run Linx to see your stock vcore in cpu-z. This should give you some baseline idea.

 

[NirHahs]

Download core temp to see VID voltages (this is a voltage table) , XMP is a ram profile many MB will default to 1300mhz , then you set XMP in bios and you get the profile memory STD supports .

If you only plan to go 4.0 ,you probably don't need much added voltage if any . I would run stock clocks have core temp open for vid and CPU-Z for core voltage and run prime95 for few mins noting VID and voltage at load .

Then just leave voltage on auto and try 40x multiplier and then see results from prime95 , noting the vid and voltage .

Then come back , for 4.0 i would say run either auto or adaptive depending on out come .

Dynamic means? Sorry my english was poor as im from malaysia. For DRAM i set it manually to 1.5000v. I already set the voltage in adaptive mode. Running prime95 for 10 min and i got 1.093-1.186v. It reaches 50-55c, im using h80i. What setting should be running on prime95? Blend?

 

[NirHahs]

No one knows because every chip is different.

Adaptive is the best mode, except it will add extra voltage when running stresstests like linx/prime/aida etc. I would start with manual fixed mode to find a stable vcore, then change it to corresponding adaptive mode.

Plenty of other settings to change depending on how high you oc, but I would start with reading some haswell oc guides.

People here mention vid but it is not the same as the actual vcore displayed by cpu-z. Leave everything at stock, then run Linx to see your stock vcore in cpu-z. This should give you some baseline idea.

After found a stable one with manual setting, which preset should i set the stable voltage? Because after selecting the adaptive mode, it gives 3 more preset. Im abit confuse here, i let them all in auto

 

[Ed1]

Dynamic means? Sorry my english was poor as im from malaysia. For DRAM i set it manually to 1.5000v. I already set the voltage in adaptive mode. Running prime95 for 10 min and i got 1.093-1.186v. It reaches 50-55c, im using h80i. What setting should be running on prime95? Blend?

Blend is fine , forget dynamic I edited post I meant adaptive .
what was vcore in cpu-z under prime95 at stock clocks ?

temps are fine for prime95 , XMP was for ram speed not voltage, 1.5v is fine as long as that is what your ram is rated at, some are 1.65v if there over 1600mhz .

 

[Ed1]

VID = voltage identifier

Every chip will have different voltage requirements at different clocks, the only way to find out what yours needs is to test for yourself.

As for how to set your voltage, "adaptive" sounds to me like a synonym for "offset" which is what most people recommend when overclocking. A simplified explanation is that CPUs have a voltage table which picks a voltage for a given clock speed, and an offset lets you add or subtract voltage from whatever the table recommends, rather than picking a set voltage (manual). This allows your chip to run at a lower voltage when it's not fully loaded and saves power.

I don't have Z87 but the adaptive is a form of offset, instead of being a flat +/- what adaptive does is say you set to +0.50v your idle is still same voltage as before it only goes higher once it reaches the point to need to go higher (multiplier wise) . So its better than older offset but it can boost higher under certain loads .

Thats my understanding, we could look it up when Z87 came out for more exact info .

 

[NirHahs]

Blend is fine , forget dynamic I edited post I meant adaptive .
what was vcore in cpu-z under prime95 at stock clocks ?

temps are fine for prime95 , XMP was for ram speed not voltage, 1.5v is fine as long as that is what your ram is rated at, some are 1.65v if there over 1600mhz .

I was tested it with 4.0 speed. Does VCORE means core voltage? Because in hwmonitor VCORE and core voltage give different result

 

[Ed1]

I was tested it with 4.0 speed. Does VCORE means core voltage? Because in hwmonitor VCORE and core voltage give different result

Yes , by default CPU-Z is core voltage

CPU-Z should match HWmonitor CPU core voltage , if you use HWmonitor it has VID voltage too .

So the 1.093-1.186v was cpu core voltage at 4.0
That is not bad the low side is more what I would expect, the 1.186v is little high but not to bad .

That is with adaptive if so what did you add for value ?

the later prime95 uses AVX instructions so that might be why it goes to 1.186v , maybe try some other app to stress and note max values .
Try few games too that would be good test , then see if its stable long term .

 

[NirHahs]

With adaptive mode, leave it as auto?

 

[NirHahs]

Yes , by default CPU-Z is core voltage

CPU-Z should match HWmonitor CPU core voltage , if you use HWmonitor it has VID voltage too .

So the 1.093-1.186v was cpu core voltage at 4.0
That is not bad the low side is more what I would expect, the 1.186v is little high but not to bad .

That is with adaptive if so what did you add for value ?

Set it in auto mode for those 3 preset.

 

[Ed1]

With adaptive mode, leave it as auto?

what did you test with above , did you leave auto or did you set it to adaptive ?

The down side to auto is it can jump higher but that generally happens with higher OC's and having the LLC higher .

With such low OC as 4.0 I don't think it will matter much .

 

[NirHahs]

what did you test with above , did you leave auto or did you set it to adaptive ?

Srry, i think u abit confuse here. I set it to adaptive, then there is another 3 option to set the voltage. I leave all in auto

 

[Ed1]

Srry, i think u abit confuse here. I set it to adaptive, then there is another 3 option to set the voltage. I leave all in auto

Ok, so you set the type of voltage regulation but didn't enter a value of +0.xxx , so really I think your on auto .

I would just leave it and test for stability if ok , if you wanted you might be able to drop voltage tiny bit but it not going to be a lot judging from your results .

Most chips run around 1.020-1.080 at stock (somewhere around there , depending on chip) .

 

[NirHahs]

Ok, so you set the type of voltage regulation but didn't enter a value of +0.xxx , so really I think your on auto .



I would just leave it and test for stability if ok , if you wanted you might be able to drop voltage tiny bit but it not going to be a lot judging from your results .



Most chips run around 1.020-1.080 at stock (somewhere around there , depending on chip) .

But, that is at stock speed. Im currently running at 4.0ghz. If i leave it in auto, would it reaches more higher than 1.186v as i mentioned above?

 

[Ed1]

But, that is at stock speed. Im currently running at 4.0ghz. If i leave it in auto, would it reaches more higher than 1.186v as i mentioned above?

Now I am confused I thought the max 1.186 was core voltage running prime95 at 4.0 .

Please run stock clocks and at 4.0 and post cpu core voltages on each (leave voltage on auto in bios).

 

[NirHahs]

Now I am confused I thought the max 1.186 was core voltage running prime95 at 4.0 .

Please run stock clocks and at 4.0 and post cpu core voltages on each (leave voltage on auto in bios).

Did u mean auto under adaptive mode? Or just auto mode?

 

[Ed1]

Did u mean auto under adaptive mode? Or just auto mode?

auto on voltage, no adaptive.

What MB do you have , model, make etc ?
I don't have Haswell MB so going to have to check your options .

 

[NirHahs]

auto on voltage, no adaptive.



What MB do you have , model, make etc ?

I don't have Haswell MB so going to have to check your options .

Im using gryphon z87. Just now we talked about my voltage 1.093-1.186, does it can reach above 1.186 randomly without my realize? I want to try it now, and tell u the result.

 

[Ed1]

Im using gryphon z87. Just now we talked about my voltage 1.093-1.186, does it can reach above 1.186 randomly without my realize? I want to try it now, and tell u the result.

Benchmarks and stress tests will get voltage to higher point than normal app .

Prime95 (latest version) and AIDA CPU stress will load voltage the highest AFAIK .

Leave HWmonitor run in background and look at your max cpu core voltage column after running many app .Leave it run for whole day to see I doubt any app you have will go to prime95 levels with voltage.

If you want you can go to manual voltage and then from lowest stable manual voltage you can find proper offset/adaptive values . This is more work and a lot more testing to make sure your stable at whatever voltage you pick .
I can't help here you need to test .

 

[NirHahs]

I was getting 1.020-1.098v at stock speed. All in default setting in bios. Also getting same result vcore for 4.0ghz. I only change the core speed setting, the core voltage still in auto mode.

 

[Ed1]

I was getting 1.020-1.098v at stock speed. All in default setting in bios. Also getting same result vcore for 4.0ghz. I only change the core speed setting, the core voltage still in auto mode.

right, that is what I figured it wouldn't go up much , I would just leave it as that and just check HWmonitor for any high voltages a few days of running .
I don't think you will have any issues at 4.0 .