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i7 6700k voltage reading problem

post #1 of 8
Thread Starter 
Hello!

I've recently built a new PC but I have some troubles with the CPU voltages. I have an Asus z170 Pro Gaming motherboard with the latest BIOS and my CPU is an Intel i7 6700k on stock with turbo mode on (4.2 GHz). I haven't tried to OC it so far for the following reasons:

First of all, I can only see the VID in both CPU-Z and HW monitor but not the Vcore readings. The only software that shows the Vcore is AIDA64 so far but I wouldn't trust one single software with it.

The other problem is the pretty high VID value. I've manually set the core voltages in BIOS to 1.26 V. If I go under it I get an "overclocking failed" message at every second startup. With this voltage the system looks stable but I haven't made any long stability tests so far because I'm not sure about the actual voltages delivered to the CPU.
Anyway, I might have to keep increasing the voltages. I guess I didn't get the greatest chip. I could live with that but it might actually be a pretty bad one since my VID readings moves from ~0.8 V (min, when idle) to over 1.45 V (max, when 'stressed'). And in case I open a web browser or do anything that' merely use the CPU the VID will skyrocket to over 1.4 volts. With auto voltages controll the Vcore follows the VID which sounds terribly high for a non-OC set up.
In manual mode the VID constantly jumps and stays above 1.4 volts while the displayed Vcore stays around the set value. In adaptive mode with auto offset both the Vcore and VID stays around the set value but I haven't tested it so far.

So my quiestion is, why do I get only VID but no Vcore readings from CPU-Z and HW monitor?
And also, how reliable are the AIDA64 Vcore readings are? With 1.26 V set in the BIOS my temps go up to 70°C average while stress testing with OCCT or AIDA64. It looks kinda high for that voltage. I use a Noctua NH-D 14 air cooler and I have two 140mm case fans. Is it possible that the CPU gets the voltages displayed by the VID readings?
My rig
(8 items)
 
  
CPUMotherboardRAMHard Drive
Intel i7 6700k Asus z170 Pro Gaming G.SKILL Ripjaws V  Samsung EVO 850 
Hard DriveCoolingOSCase
Western Digital Caviar Blue Noctua NH-D 14 Windows 10 Fractal Design Define R5 
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My rig
(8 items)
 
  
CPUMotherboardRAMHard Drive
Intel i7 6700k Asus z170 Pro Gaming G.SKILL Ripjaws V  Samsung EVO 850 
Hard DriveCoolingOSCase
Western Digital Caviar Blue Noctua NH-D 14 Windows 10 Fractal Design Define R5 
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post #2 of 8
VID is the requested CPU voltage by the CPU. It usually isn't what the CPU gets. The Vcore / Core Voltage is what the motherboard sets and is given to the CPU.

Have you tried HWinfo64? 70°C during CPU stress test at that voltage looks normal to me. What is the max it will hit instead of average?
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Intel Core 2 Quad Q6600 Asustek P5Q-PRO Nvidia 9800 GTX+ Kingston DDR2 8gb 
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Western Digital 1 TB Pioneer Noctua NH-U9B Windows 7 Ultimate 64-bit 
MonitorKeyboardPowerCase
Dell Monitor Logitech G110 Antec 750W Thermaltake Aluminium Old Case 
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Gaming Computer
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Intel Core 2 Quad Q6600 Asustek P5Q-PRO Nvidia 9800 GTX+ Kingston DDR2 8gb 
Hard DriveOptical DriveCoolingOS
Western Digital 1 TB Pioneer Noctua NH-U9B Windows 7 Ultimate 64-bit 
MonitorKeyboardPowerCase
Dell Monitor Logitech G110 Antec 750W Thermaltake Aluminium Old Case 
MouseMouse PadAudio
Logitech G500 Gaming Mouse Generic Mousepad Soundblaster 5.1 VX 
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post #3 of 8
I have an Asus board too, and I think vcore and VIN get mixed up in software with some of their boards. I have my UEFI set to adaptive vcore up to 1.3V. And yet, software always reads it as VIN.
post #4 of 8
You need to use HWInfo to reliably get Vcore reading from newer Intel chips. The others only show VID.

Your best bet is to use manual voltage in conjunction with power saving settings (EIST, C1E, C3/6), that way you get a consistent voltage under load, while still allowing the chip to downvolts at idle.
Edited by Forceman - 8/21/16 at 7:31pm
post #5 of 8
Thread Starter 
Thank you guys for the help!

I've started using HWiNFO which shows both my VID and my Vcore.
I've OC'd my CPU to 4.6 GHz with 1.325 volts. (I know it's way too low, I'm not that optimistic I just want to see how much voltage is actually delivered first before accidently overvolting my CPU.) I've started stress testing but my Vcore readings hits 1.360 volts (max) and constantly stays above 1.340 V when stress testing. Are these readings accurate? Also, I've realized that with 1.26 V set manually I've almost constantly got voltages above 1.3 V in the BIOS under "CPU core voltage" while both AIDA64 and HWiNFO showed constant Vcore readings below 1.3 V under load. Which one should I belive?
Also, how should I set my LLC? Could too high LLC level be the reason for the increased voltage readings?

With these settings I get a maximum 83°C on core 0 while all the other cores are maxed at about or below 80°C with an ambient temperature of 24°C. Have I applied thermal compound unevenly or it's normal behaviour?
Quote:
Originally Posted by Forceman View Post

You need to use HWInfo to reliably get Vcore reading from newer Intel chips. The others only show VID.

Your best bet is to use manual voltage in conjunction with power saving settings (EIST, C1E, C3/6), that way you get a consistent voltage under load, while still allowing the chip to downvolts at idle.

Where do I find these power saving settings? And can/should I turn them on at the same time?
Edited by KMarci - 8/23/16 at 9:24am
My rig
(8 items)
 
  
CPUMotherboardRAMHard Drive
Intel i7 6700k Asus z170 Pro Gaming G.SKILL Ripjaws V  Samsung EVO 850 
Hard DriveCoolingOSCase
Western Digital Caviar Blue Noctua NH-D 14 Windows 10 Fractal Design Define R5 
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My rig
(8 items)
 
  
CPUMotherboardRAMHard Drive
Intel i7 6700k Asus z170 Pro Gaming G.SKILL Ripjaws V  Samsung EVO 850 
Hard DriveCoolingOSCase
Western Digital Caviar Blue Noctua NH-D 14 Windows 10 Fractal Design Define R5 
  hide details  
Reply
post #6 of 8
I submitted sensor dumps to Fiery @ FinalWire and some other info to Martin @ HWinfo for my motherboard, and now both applications give reasonably close results, although if eVGA were a little more helpful, the readings might have actually been accurate, but eVGA decided not to be helpful...
PC
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-6700K eVGA Classified K eVGA GTX970SSC G.Skill F4-3600C16-16GTZ 
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2x Samsung 960 EVO M.2 RAID0 Samsung SH-S223L Custom Loop D5 Vario, Thermochill PA140.3, Heat... W7 U SP1 x64 
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Viewsonic VX2770 Logitech Corsair AX1200, APC RS1500 LCD Thermaltake VG4000SNA  
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Logitech 
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PC
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-6700K eVGA Classified K eVGA GTX970SSC G.Skill F4-3600C16-16GTZ 
Hard DriveOptical DriveCoolingOS
2x Samsung 960 EVO M.2 RAID0 Samsung SH-S223L Custom Loop D5 Vario, Thermochill PA140.3, Heat... W7 U SP1 x64 
MonitorKeyboardPowerCase
Viewsonic VX2770 Logitech Corsair AX1200, APC RS1500 LCD Thermaltake VG4000SNA  
Mouse
Logitech 
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by benjamen50 View Post

VID is the requested CPU voltage by the CPU. It usually isn't what the CPU gets. The Vcore / Core Voltage is what the motherboard sets and is given to the CPU.

Have you tried HWinfo64? 70°C during CPU stress test at that voltage looks normal to me. What is the max it will hit instead of average?

Are you sure these are normal temps with an NH-D 14 cooler? Others seems to achive similar temperatures with a Hyper 212.
Also, right now I'm testing 4.4 GHz with 1.32 V and my temps spikes to 80°C with an average of 75°C. With 24°C ambient temperature shouldn't it be lower? The actual Vcore is maximum 1.344 according to HWiNFO but it rarely goes that high even while stress testing.
My rig
(8 items)
 
  
CPUMotherboardRAMHard Drive
Intel i7 6700k Asus z170 Pro Gaming G.SKILL Ripjaws V  Samsung EVO 850 
Hard DriveCoolingOSCase
Western Digital Caviar Blue Noctua NH-D 14 Windows 10 Fractal Design Define R5 
  hide details  
Reply
My rig
(8 items)
 
  
CPUMotherboardRAMHard Drive
Intel i7 6700k Asus z170 Pro Gaming G.SKILL Ripjaws V  Samsung EVO 850 
Hard DriveCoolingOSCase
Western Digital Caviar Blue Noctua NH-D 14 Windows 10 Fractal Design Define R5 
  hide details  
Reply
post #8 of 8
I have a i7 4790K @ 4.7 on 1.3v. It maxes out at 84°C on a NH-D14 with a ambient temp of 21C. It's probably colder where I am now.

CPU is also delidded with CLU as well.

Stress test used is AIDA 64 v5.60.

Let's say stock is worst case scenario. Bump it up to a hyper 212 / cryorig h7 that's 10-15C lower.

Now with a D14 or high end AIO it's 5-10C more of a drop.
Edited by benjamen50 - 8/24/16 at 1:23am
Gaming Computer
(19 items)
 
   
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6600 Asustek P5Q-PRO Nvidia 9800 GTX+ Kingston DDR2 8gb 
Hard DriveOptical DriveCoolingOS
Western Digital 1 TB Pioneer Noctua NH-U9B Windows 7 Ultimate 64-bit 
MonitorKeyboardPowerCase
Dell Monitor Logitech G110 Antec 750W Thermaltake Aluminium Old Case 
MouseMouse PadAudio
Logitech G500 Gaming Mouse Generic Mousepad Soundblaster 5.1 VX 
  hide details  
Reply
Gaming Computer
(19 items)
 
   
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6600 Asustek P5Q-PRO Nvidia 9800 GTX+ Kingston DDR2 8gb 
Hard DriveOptical DriveCoolingOS
Western Digital 1 TB Pioneer Noctua NH-U9B Windows 7 Ultimate 64-bit 
MonitorKeyboardPowerCase
Dell Monitor Logitech G110 Antec 750W Thermaltake Aluminium Old Case 
MouseMouse PadAudio
Logitech G500 Gaming Mouse Generic Mousepad Soundblaster 5.1 VX 
  hide details  
Reply
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