I have a 3770k mobo giga  z77x-ud3 and overclocked to 4.7

my question is: I have v-core set to auto , is that correct?

is it better to try and fill in a certain number like 1.50 or 1.40

I noticed in cpu-z that the volt runs between 1.2 and 1.5

 

regards

 

Some frown upon auto V-core, claiming that the motherboard manufacturers auto rules unnecessarily over volt.

 

Stress tests would have to be run, in order to determine the voltage an individual CPU requires. If those stress tests haven't been done, then the manufacturer of the motherboard is simply providing you with a generic voltage that should enable a stable overclock for most chips.

 

If you say, that under load your CPU runs as high as 1.5 volts, then that does sound high. My 3770K is a CPU that requires a lot of volts to overclock in a stable fashion, but it never goes above 1.328 volts at 4.4GHz.

 

To be honest, anything above 1.350 volts for Ivy Bridge is very difficult for the CPU cooling solution to deal with, as a result of how Intel designed the CPU/IHS interface.

 

In view of the above, I would check your CPU temperature under load as a priority, I wouldn't be surprised if it it's very high!

 

Of course, you may have a delidded CPU that can handle the voltage, or you have been lucky enough to do very well in the silicone lottery. But still check those temps, in RealTemp or CoreTemp.

I did and it never is higher then 60 degrees

my question is do I have to change auto to a certain voltage ?

mostly  my  temps are between 40 and 60 degrees.

I have watercooling

what are your thoughts about it.

Paula, if you can run Prime 95, with your CPU at 4.7 GHz, and at 1,5 volts, and only see 60 degrees in RealTemp, that is  astonishing.
 
You say water cooling, but what kind of water cooling, a basic all in one cooler, or a full blown water cooling loop?
 
I suspect you are referring to CPU temp, rather than core temp. CPU temp is lower, core temp is the temperature that's important to know. Which temperature monitoring software are you using.

 

my question is do I have to change auto to a certain voltage ?

 

 

 

If your CPU is stable, and you do indeed have very low temps, then no. You don't "have" to.

 

I would like to know exactly what kind of cooling you have though, and how you are measuring temp.

 

If I run my CPU at 4.7 with 1.5 volts, the temp in prime would be into the 90's.

I have the hydra H100 as water cooler

the core temps are cpu core 25W and core temps are 50 degrees.

thats in hardwaremonitor display

in cpu-z core temps are 1.45V and 4.7 ghz

is this what you need to know?

I'm very confused Paula.

 

That temperature doesn't seem right.

 

At 4.7 GHz, and 1.45 volts, it's impossibly low.

 

Run Prime95.

Check temperatures in RealTemp while Prime95 is running.

 

Download RealTemp, or download and use CoreTemp.

 

You will have...

Core0

Core1

Core2

Core3

 

What is the temperature for each, while running Prime95?

 

There is no way the H100 can generate temps as low as 50 degrees at 4.7GHz.

I saw on the open hardware monitor

that clocks were working on 4.2 mhz instead of 4.7

the temps were 90  degrees each and cpu core 100% load

I put the clock down to 4.4 ghz and see now temps around 79 degrees

clock 4.4 and load  cpu 50%

 

in the power corner is cpu package 70W cpu cores 65 W

hope you could let your view on it

I put the clock down to 4.4 ghz and see now temps around 79 degrees

 

clock 4.4 and load cpu 50%

80 or below in Prime95 is a safe temperature.

 

I presume you are still using auto voltage? If so, what does the voltage read now, while under load?

I just tried 4.6 gz and cpu load says 100% and the temps are 94- 97 degrees and I put HT off.

cpu-z reads 1.46 in auto

 

I try again with 4.4 gz and the temps are 75-80 and the vcore temp is still high 1.40 on auto HT =off

cpu load =100%

Keep away from the 90's, Once you get into the high 90's the CPU will throttle back, and eventually shut down to avoid damage. Dergradation of the CPU could result if you sustain that tempreture too long.

 

I try again with 4.4 gz and the temps are 75-80 and the vcore temp is still high 1.40 on auto HT =off

 

 

 

You could try lowering the voltage manually. Gradually.

 

You are clearly inexperience in terms of overclocking Paula, so my advice to you, would be to stick to something like 4.2 GHz.

 

Then, when you have studied overclocking more, and have a better idea how the process works, you could experiment further.

ok last question

if the auto gives a temp about 1.40 with 4.4 oc.

why should I try to lower this step by step if the temps automatticaly asks this?

The lifespan of a CPU is related to how high the voltage is and how high the temperature is. Voltage and heat eventually degrade a CPU.

 

Higher voltage = more heat.

 

So despite the fact that you might be within the temperature limits regarded as safe for long term use, and be within Intel's voltage specifications...  it makes sense to only use the voltage you need, rather than excessive voltage.

 

It's about maximising the lifespan of the CPU.

 

:smile:

Yes I do understand but the question was more related to the fact that the real temps

say 1.40 so what advantage does it have to reduce voltage if obviously the real temps says you need 1.40!

if i lower that then probebly it wont work anymore.

the lifeciycle is not so important because after two years everything is outdated anyway

Automatic voltage gives you a voltage that will work for most people. Therefore it's  higher than many need.

 

All CPU's vary in regard to how much voltage they actually need.

 

It's likely that your CPU doesn't actually require such high voltage. So, by experimenting with a lower voltage you can find a voltage that's sufficient for your particular CPU.

 

Yes, as you reduce voltage, you will reach a point where the PC crashes. At that point we increase voltage enough so that the PC is stable. That way you end up with the lowest voltage that is stable, and thus lower temperature.

 

In your case Paula, as you have virtually no experience in regard to overclocking, I would say you should simply overclock to around 4.2, with auto voltage and leave it at that.

 

You shouldn't be overclocking significantly with zero experience and almost no knowledge, such a thing is risky.

ok thanks I will follow your advice

 

see you