4790k vcore showing wrong?

[Dennis Caplinger]

I have my 4790k oc'd to 4.7ghz , everything running fine and temps ok.... problem is that OCCT and HwMonitor both show my Vcore as 1.87. I run Cpu-Z and it shows it as 1.369 and 1.37 during stress testing. My temps during the stress testing top out around 70. Is this just showing up wrong or what? I'm using a Asus Maximus VII Hero by the way. Thanks

[xox]

Yeah, you go into the BIOS to show proper voltages. Not all programs will show the same (although CPU-Z gets it right ~80% of the time)

[Rheinwasser]

software voltage is almost never correct.

[Queek]

I have my 4790k oc'd to 4.7ghz , everything running fine and temps ok.... problem is that OCCT and HwMonitor both show my Vcore as 1.87. I run Cpu-Z and it shows it as 1.369 and 1.37 during stress testing. My temps during the stress testing top out around 70. Is this just showing up wrong or what? I'm using a Asus Maximus VII Hero by the way. Thanks

What did you set it to in the bios for the overclock?

In my experience, the AI Suite voltage is pretty accurate under load (off by about 0.01V or less from true read with a digital multimeter on my M7Gene).  This is a reasonably common problem to have different voltages in different programs.  1.87V is pretty much what your Vin should be (different from Vcore), so maybe that's what those programs are reading instead.  

While not at load I haven't found an accurate piece of software for voltage monitoring.  

If you really care, pop down to your nearest electronics store and pick up a cheap digital multimeter and use the voltage checkpoints on your motherboard to verify the voltages.  

 

On a slightly related note, are you using adaptive voltage while stress testing, because 1.37V is a tad high for DC cpus.  What stress test are you using?

[Dennis Caplinger]

I figured my temps would be alot higher even if it was running at 1.5v , I'm using a H100i as my cooling. Thanks guys, now time to try to get it stable with lower than 1.37 vcore.

[JJR10]

HWMonitor also shows my Vcore at 1.87 and I suspect this is actually showing the VCCIN as I have that set to 1.88 in my bios.

 

If you look under the voltages directly under the CPU tree in HWMonitor, you should see your proper vcore under "VID". At least it does for my 4690k.

[Dennis Caplinger]

What did you set it to in the bios for the overclock?

In my experience, the AI Suite voltage is pretty accurate under load (off by about 0.01V or less from true read with a digital multimeter on my M7Gene). This is a reasonably common problem to have different voltages in different programs. 1.87V is pretty much what your Vin should be (different from Vcore), so maybe that's what those programs are reading instead.

While not at load I haven't found an accurate piece of software for voltage monitoring.

If you really care, pop down to your nearest electronics store and pick up a cheap digital multimeter and use the voltage checkpoints on your motherboard to verify the voltages.

On a slightly related note, are you using adaptive voltage while stress testing, because 1.37V is a tad high for DC cpus. What stress test are you using?

I left the vcore on Auto just to see what it tried to use. I put llc on level 7 and power phase on Extreme. Occt and HwMonitor show the 1.87v . 2 different versions of cpuid show 1.37 at full load and idle around .87

Edit: Also, Aida64 also shows about 1.37 during stress testing.

[Queek]

I left the vcore on Auto just to see what it tried to use. I put llc on level 7 and power phase on Extreme. Occt and HwMonitor show the 1.87v . 2 different versions of cpuid show 1.37 at full load and idle around .87

When stress testing, always use manual voltage.  Your actual vcore is probably 1.37 under load, and 1.87 is probably Vin (which you don't need to change for overclocking).  1.3V is the generally accepted max vcore for all-in-one coolers, for reference.  

That LLC level should be fine, but LLC isn't as critical for Haswell and DC chips because vcore regulation happens on the chip.  (LLC just affects Vin stability, which is the voltage supplied to your cpu as a whole.)  

 

To be perfectly honest, AI Suite is a pretty good tool to use while overclocking, and it's reasonably accurate (although I'd recommend using RealTemp or similar to monitor temps).  

[Dennis Caplinger]

When stress testing, always use manual voltage. Your actual vcore is probably 1.37 under load, and 1.87 is probably Vin (which you don't need to change for overclocking). 1.3V is the generally accepted max vcore for all-in-one coolers, for reference.

That LLC level should be fine, but LLC isn't as critical for Haswell and DC chips because vcore regulation happens on the chip. (LLC just affects Vin stability, which is the voltage supplied to your cpu as a whole.)

To be perfectly honest, AI Suite is a pretty good tool to use while overclocking, and it's reasonably accurate (although I'd recommend using RealTemp or similar to monitor temps).

Yeah , I am using Realtemp for my temps but it doesn't show vcore so I was using cpuz. I was using the bios to make changes.. is Ai Suite an additional program? Should I just manually set my Vcore to 1.37 and then keep adjusting it down until its not stable?

[Queek]

Yeah , I am using Realtemp for my temps but it doesn't show vcore so I was using cpuz. I was using the bios to make changes.. is Ai Suite an additional program? Should I just manually set my Vcore to 1.37 and then keep adjusting it down until its not stable?

AI Suite is ASUS software.  It's on the DVD that came with your motherboard, or you can download it from the support site for your board.  

You should set your VCore to 1.3 and see how high you can get the multiplier and stay stable.  After you get something stable, you can (and should) set up an adaptive overclock.  

[LogicalDrm]

That is bug in HWmonitor on Asus Z97 boards. I've seen it before and panicked with one first time overclocker.