CPU Cache and System Agent Voltage

[Cmptr]

Just a quick hopefully simple question, but do you think System Agent Voltage will help much when overclocking CPU Cache?  Or is it better just to be left at auto unless unless overclocking RAM (Even then though, there is a separate System Agent Voltage for RAM overclocking)

 

CPU: 11900K

Mobo: Asus Maximus Hero XIII

 

Before I was using VID Offset, but right now I'm going with just manual vcore.

 

I'm still testing, but as of right now, this is what I've got.

LLC6

vcore 1.49

XMP1

52 all core (Including AVX2/AVX512)

46 Uncore

 

The voltage I used prior to this test was 1.48, and a bit more than 9 hours in running blender bmw it crashed.  I'm assuming there was a BSOD.  (Not 100% because I was at work)

 

I'm worried that raising vcore wont' really do anything, and I should be raising something else (System Agent Voltage).  Should just leaving it on auto be fine?  Or should I really raise it, check for stability then try lower vcore?

[Guest]

Unless cache has its own voltage setting, it uses cpu vcore.

 

No reason to use more than 1.20v for system agent or Vccio. It'll kill the chip faster.

 

If you're using that much vcore at 5.2 ghz, it's probably too hot and eventually fails the burn in tests. The heat and vcore will wear the chip out fast. 

 

I mean, you should be able to pull off 5ghz cpu all core and 4.7ghz cache with around 1.350v give or take. 5.2ghz, you're just beating the chip.

[Cmptr]

8 minutes ago, Guest 5150 said:

Unless cache has its own voltage setting, it uses cpu vcore.

 

No reason to use more than 1.20v for system agent or Vccio. It'll kill the chip faster.

 

If you're using that much vcore at 5.2 ghz, it's probably too hot and eventually fails the burn in tests. The heat and vcore will wear the chip out fast. 

 

I mean, you should be able to pull off 5ghz cpu all core and 4.7ghz cache with around 1.350v give or take. 5.2ghz, you're just beating the chip.

I've got 2xx360mm rads and a 240mm rad in a custom loop.  My temps aren't that bad.  85 average on full load with vcore averaging 1.395 all with 8x Nactua 3000RPM fans on full blast!  (Yes, it is very loud)

[Guest]

Just now, Cmptr said:

I've 2xx360mm rads and a 240mm rad in a custom loop.  My temps aren't that bad.  85 average on full load with vcore averaging 1.395

Yeah, that's pretty warm. 85c, that's the stability tipping point. 

 

So more heat creates more vcore leakage. That's why you're near 1.5v. But leakers sometimes overclock the best on chilling or extreme methods. 

 

Any how longevity over 1% fps highs imo. 

 

But no, definitely not Vccio and System agent over 1.2v. Even if you where CL16 4000mhz Ddr4. If the board on auto runs those higher, turn them down. That might help your temps too.

 

 

 

 

[Cmptr]

2 minutes ago, Guest 5150 said:

Yeah, that's pretty warm. 85c, that's the stability tipping point. 

 

So more heat creates more vcore leakage. That's why you're near 1.5v. But leakers sometimes overclock the best on chilling or extreme methods. 

 

Any how longevity over 1% fps highs imo. 

 

But no, definitely not Vccio and System agent over 1.2v. Even if you where CL16 4000mhz Ddr4. If the board on auto runs those higher, turn them down. That might help your temps too.

 

 

 

 

I'm not worried too much about my chip, I upgrade every 2 generations, sometimes sooner.

 

I'm also not gamming.

 

My main concern is, do you think the crash is because of two low of vccio and system agent?  Or do you think it is the vcore?

[Guest]

Just now, Cmptr said:

I'm not worried too much about my chip, I upgrade every 2 generations, sometimes sooner.

 

I'm also not gamming.

 

My main concern is, do you think the crash is because of two low of vccio and system agent?  Or do you think it is the vcore?

It's the temps.

 

Not vccio. Not system agent (which Asus on auto pumps stupid settings like 1.45v SA/IO.) So likely not the voltages.

 

Now you did get 9 hours out of it. I'd say tweak to lower the max temp best as possible. 

 

And might as well turn off cstates too. Just run a solid vcore number. 

[Cmptr]

6 minutes ago, Guest 5150 said:

It's the temps.

 

Not vccio. Not system agent (which Asus on auto pumps stupid settings like 1.45v SA/IO.) So likely not the voltages.

 

Now you did get 9 hours out of it. I'd say tweak to lower the max temp best as possible. 

 

And might as well turn off cstates too. Just run a solid vcore number. 

I've got cstates off of course.  CPU VCCIO is 1.056 and CPU VCCSA is 1.136.  They aren't high at all.

 

I've also ran the exact same test before for 19 hours with close to these temps.  Temps were average in the 80's.  The only difference is uncore was 43.

[Guest]

4 minutes ago, Cmptr said:

I've got cstates off of course.  CPU VCCIO is 1.056 and CPU VCCSA is 1.136.  They aren't high at all.

 

I've also ran the exact same test before for 19 hours with close to these temps.  Temps were average in the 80's.  The only difference is uncore was 43.

You can try higher vccio and system agent, but that'll add more heat of course. Got nothing to loose trying.

[Cmptr]

12 hours ago, Guest 5150 said:

You can try higher vccio and system agent, but that'll add more heat of course. Got nothing to loose trying.

Do you think raising it will actually help though?  Or do you think auto should be fine?

[Guest]

7 minutes ago, Cmptr said:

Do you think raising it will actually help though?  Or do you think auto should be fine?

No, not really. Those 2 voltages are for memory and bclk overclocking. They do nothing for cache frequency.

[Cmptr]

1 hour ago, Guest 5150 said:

No, not really. Those 2 voltages are for memory and bclk overclocking. They do nothing for cache frequency.

You should have just said that in the first place as this is what this topic was about the whole time.  Thank you though.   I really apricate your feedback.  You have helped a lot, especially on some of my other topics.

[Guest]

3 hours ago, Cmptr said:

You should have just said that in the first place as this is what this topic was about the whole time.  Thank you though.   I really apricate your feedback.  You have helped a lot, especially on some of my other topics.

I wanted to be sure exactly what you where asking first. But usually I try to be straight forward and the reason I gave you limits for Vccio and SA. That way you're not baking the chip for no reason because I didn't (and still don't know) what your memory clocks are and if you're tweaking timings ect ect.

 

Never the less you're welcome!