8700K 8Pack delid 5.0GHz AVX 0 rock solid. VCore too high?

[SledDriver]

Bought this excellent CPU off 8pack 16 months ago and it's been rock solid at 5GHz with AVX offset of 0.

Was just running Prime 95 on it for a while and the temps are getting high - seeing a few Tj slow-downs on Prime95, although they are fine when gaming.

Setup is: (which number do I believe in BIOS - the one in the box or the one not in the box?)
Core ratios all 50
Speedstep disabled
CPU Core 1.328/Auto
DRAM Volts 1.408/1.4058
VCCIO 1.128/1.100
SA 1.128/1.100
CPU Standby 1.116/1.100
LLC Level 6
Current Cap 140%

Under Prime95 stress test HWiNFO64 is showing V-Core VID up to 1.448V and Vcore up to 1.504V. Seems very high. I assume the Vcore is being upped by the Auto setting from 1.328 to 1.504 when in use? Is this a bad thing? Does the Auto setting lack the control necessary?

Is it OK? Should I be changing something? Don't want to kill it prematurely.

Cheers,

 

[SledDriver]

Yes, Asus Z-370-A mobo.

 

[Rainmaker]

I have that chip in the Maximus X, and run it 5GHz all core, AVX and cache/ring. I found that setting the voltage to adaptive+auto actually got me a better clock/volts than doing it manually. With manual volts I was only able to stay stable at 1.325v but when setting it to adaptive+auto I get a solid 5GHz all across the chip and voltage tends to hover between 1.28 and 1.3v. Try dropping your LLC down to 5 also, I've never needed more than that.

 

[SledDriver]

I'm not understanding something.

I set my VCore to 1.325 in the BOIS, fire up windows and HWinfo64 and it says the VCORE is at 1.472 without even running a stress test.

I am clocking at 5GHz AVX-3. LLC was 6 now 5.

Adaptive voltage, was auto before I started the current tweaks.

Why are my volts so high? Any ideas? What's the point of a Vcore setting in bios if it seems to get ignored?

 

[Rainmaker]

Likely because you increased the current cap to 130/140% and if you've changed it to adaptive (auto?) then it'll pump whatever volts it thinks the chip needs. Just keep playing around with it.

 

[SledDriver]

So is it safe to reduce my CC?

Sorry, lots to learn

 

[Rainmaker]

So is it safe to reduce my CC?

Sorry, lots to learn

You shouldn't need to. What are your exact settings atm? You're not on the Maximus X Hero so I can't tell you exactly, but my settings are:

50x multi (all core)
AVX Offset 0
Cache 50
VCore mode: Offset (auto), which as I said actually allows me the same clock at lower volts. Quirk of the board I guess.
IO 1.2v
SA 1.22v
CPU Standby 1.2v
LLC 5
Current cap 140%

That runs flawlessly and idles around 26 to 27 degrees in my case, hitting 50-something under load.

 

[SledDriver]

OK Here is a list of my current setting. I notice on many there is a number beside the name with another number in a box which I can edit. I assume the number not in the box is the current value? Correct? So how does that relate to the numbers I enter in the box, which are not the same. Or have I got this all wrong?

Anyway, here are a bunch of my current settings - I have shown the settings in the boxes in [ ].

CPU Core Ratio: 50
AVX Offset: -3
Mem: XMP
LLC: 5
Current Cap: 140%
AC Load Line: Auto
DC Load Line: Auto
BCLK: Disabled
CPU Core Volts: 1.344 [Adaptive]
- Offset Sign: +
- Additional Turbo Volts: [1.325]
- Offset Voltage: [Auto]
DRAM Volts 1.408 [1.4058]
VCCIO: [1.1]
SA: [1.1]
PCH Core Volts: 1.032 [Auto]
CPU Standby Volts: 1.113 [1.1]

Can you explain why as I type, the Vcore setting above is 1.344V with Turbo Volts of 1.325, yet HWinfo64 is currently showing the very high 1.456V with the system not loaded at all?

Cheers.

 

[SledDriver]

Under load the Vcore is currently 1.424V which is too high according to all my reading, let alone the 1.456V when it's not loaded.

So confused.

 

[SledDriver]

After a long session of tweak and test I now have the machine running at 1.355V Vcore instead of 1.44V, and with AVX 0 instead of -3, and running cooler.

These are my settings. Can anyone suggest an improvement on this?

BCLK 100
AVX Offset: 0
SVID Behaviour: Best case scenario
CPU Core Ratio: 50 All Cores
CPU SVID Support Disabled
Mem: XMP
LLC: 5
Current Cap: 140%
AC Load Line: Auto
DC Load Line: Auto
CPU Core Volts: Adaptive
- Offset Sign: +
- Additional Turbo Volts: 1.355
- Offset Voltage: 0.001
DRAM Volts 1.4058
VCCIO: 1.1
SA: 1.1
CPU Standby Volts: 1.1

 

[Rainmaker]

That's looking very nice mate. Good improvement!