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Haswell Overclocking Guide [With Statistics] - Page 198

post #1971 of 19637
Quote:
Originally Posted by Anusha View Post

My M6H + 4770K has the exact same behavior.

Plus, my BCLK seems to shoot to 102MHz randomly while stress testing!!! That is like going up an entire multiplier which is definitely not stable.

I need a new BIOS for my M6H. :-/ something that only requires me to set the Vcore and Multiplier to overclock. Having two many options is bad.

There is a setting on your M6H called CPU strap and its probably in auto? I believe leaving that in auto allows the bios to move the bclk around. Adjust it from auto and that might help you.
 
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post #1972 of 19637
I also posted in the degradation thread, but I figured you guys might want to know.

For the first time in almost 15 years I have successfully degraded a chip. I thought I have everything dialed in was getting ready to play some BF3. Had some lockups and thought I might have killed one of my Titans, tried to make sure it was not the cpu and now it will not Prime, LinX, or Fold at overclocked or stock speed. The chip is naked with a Corsair H100 directly on the die. Temperatures never exceeded 75C.

Now when I attempt to use Chrome I get artifacts and with games I get lockups or crashes to the desktop. It fails almost instantly on Prime95 and LinX. Can the integration of chipset functions into the CPU make a video card seem degraded?

Previsouly Stable:
-4770K at 4.8 Ghz with initial testing at 1.45V and stability found at 1.375V
-Cache at 4.5 with testing at 1.3V and stability at 1.275V
-Vrin 2.0V | LLC 100%
-Remaining voltages all approximately +0.1 over Auto values at stock speed.

I will be picking up another CPU this afternoon, hopefully I do not have to RMA one of the Titans. I enjoy overclocking, but I think I need to stop wasting time trying to get that last 5%. This time around I will probably stick to 1.25V and just be satisfied with what it gives me.

Is there a consensus on which batch I should look for?
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post #1973 of 19637
Set blck to 100, with the low latency settings there is no real need to leave these on auto.

This are just the ones you mess with if you don't wanna change the divider which will just leave more heat with rougly the same performance, as said by sin08. (IIRC)

Strap and blck should be the same and if you change them you should also change the calibration thing(can't remember the name in english).

How many times in IBT would you guys call stable set at a run of 10?
Warning: Spoiler! (Click to show)

IntelBurnTest v2.54
Created by AgentGOD

Processor: Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
Clock Speed: 3.50 GHz
Active Physical Cores: 8
Total System Memory: 8129 MB

Stress Level: Standard (1024 MB)
Testing started on 9/5/2013 9:32:17 PM
Time (s)Speed (GFlops)Result
[21:32:30] 7.530118.71483.156799e-002
[21:32:43] 7.559118.24713.156799e-002
[21:32:57] 7.583117.88503.156799e-002
[21:33:10] 7.566118.14033.156799e-002
[21:33:23] 7.483119.45543.156799e-002
[21:33:36] 7.525118.78713.156799e-002
[21:33:49] 7.539118.56583.156799e-002
[21:34:02] 7.537118.59353.156799e-002
[21:34:15] 7.521118.85753.156799e-002
[21:34:28] 7.510119.02113.156799e-002
Testing ended on 9/5/2013 9:34:28 PM
Test Result: Success.

Passed 3 time in a row now, how many times should you suggest?
Quote:
Originally Posted by RushiMP View Post

I also posted in the degradation thread, but I figured you guys might want to know.

For the first time in almost 15 years I have successfully degraded a chip. I thought I have everything dialed in was getting ready to play some BF3. Had some lockups and thought I might have killed one of my Titans, tried to make sure it was not the cpu and now it will not Prime, LinX, or Fold at overclocked or stock speed. The chip is naked with a Corsair H100 directly on the die. Temperatures never exceeded 75C.

Now when I attempt to use Chrome I get artifacts and with games I get lockups or crashes to the desktop. It fails almost instantly on Prime95 and LinX. Can the integration of chipset functions into the CPU make a video card seem degraded?

Previsouly Stable:
-4770K at 4.8 Ghz with initial testing at 1.45V and stability found at 1.375V
-Cache at 4.5 with testing at 1.3V and stability at 1.275V
-Vrin 2.0V | LLC 100%
-Remaining voltages all approximately +0.1 over Auto values at stock speed.

I will be picking up another CPU this afternoon, hopefully I do not have to RMA one of the Titans. I enjoy overclocking, but I think I need to stop wasting time trying to get that last 5%. This time around I will probably stick to 1.25V and just be satisfied with what it gives me.

Is there a consensus on which batch I should look for?

Well it's already stated you shouldn't go over 1.4 in vcore so that might be one reason, also your uncore is high, very high.

Even if temp's do not always pass the limit there's electronic migration and so on to consider with voltages.

Ps. The only reason i believe a cpu could degrade a gpu would be from bottlenecking, also considering you have titan sli it might just be your cpu that needs additional tweaking or settings on your motherboard.(just theorizing)
Edited by Hyolyn - 9/5/13 at 5:43am
post #1974 of 19637
4670k + Asus Plus

In the bios I have change the ratio to 44 for all CPU's.
Then I have enable the adaptive mode, the voltage adaptative offset field is set to Auto and the Additional Turbo Mode CPU Core Voltage field is set on 1.2

I'm running prime95 and the CPU VCORE has jumps up to 1.28, despite the limit is 1.2. I guess this is because the AVX instructions of Prime95.

If I increase the bclk to 120 and the multiplier to 36-37, That would mean that I can achieve also the same performance around 4.4ghz, using less voltage?
What other things are affected by the BCLK? ram freq?
I know how to lower down the RAM freq in order not to overclock it.
But what else would I need to lower down (because is affected by the BCLK) to only oc the CPU freq? CPU cache?

There is any warning against the use of BCLK for overclocking? any disadvantage?

What is the uncore? I can't find this setting in asus bios
And about the CPU cache? can I keep it in auto?
Edited by l0rdraiden - 9/5/13 at 7:47am
post #1975 of 19637
Quote:
Originally Posted by Spudinske View Post

So I can't reach 4.5ghz @ 1.3v with 35x cache. Is my cpu a really horrible one? I'm wondering if I should have it switched out.

I can't even get 4.2ghz at 1.3v.

If you ask me, Intel should offer free replacements for K chips that don't overclock well. Considering that's the entire point of the K chips.
    
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post #1976 of 19637
Quote:
Originally Posted by Spritanium View Post

I can't even get 4.2ghz at 1.3v.

If you ask me, Intel should offer free replacements for K chips that don't overclock well. Considering that's the entire point of the K chips.
I'm just wondering if our cpu's are of the norm or if they're at the outskirts of bad and if should get another one.
post #1977 of 19637
Quote:
Originally Posted by The Storm View Post

There is a setting on your M6H called CPU strap and its probably in auto? I believe leaving that in auto allows the bios to move the bclk around. Adjust it from auto and that might help you.
i set it to 100.0 manually, but that didn't make much difference. i also played with Spread Spectrum. no good. then Filter PLL setting setting. no change.

i don't want to jinx anything, but i think SB PLL fixes the problem considerably compared to the AUTO/LC PLL setting for PLL Selection setting. ironically, LC PLL is what you should use when the BLCK is low. (i.e stock or around that).

previosly, i couldn't get OCCT to pass 45min without error with 43x/1.26V/LC PLL. but managed to run 43x/1.25V/SB PLL for 1.5hrs before i stopped it. now i'm trying 43x/1.23V/SB PLL where as with LC PLL it would have given an instant BSOD (i mean, within 5 min). now i'm into 30min. weird ha?

and when i checked the OCCT's reading, it still goes up to 102MHz BCLK, but it took a hell of a lot of time to register that first. with LC PLL, it hit 102MHz BCLK within seconds or couple of minutes, but with SB PLL, it took 10minutes to register the 102MHz PLL.

Call me crazy! I think there definitely is something wrong with the BIOS. I've posted on ROG forums and asked Raja to see if there is really something wrong in the BIOS. i hope he checks it, finds that 0there is an issue, and fix it in the next BIOS.
Edited by Anusha - 9/5/13 at 8:02am
post #1978 of 19637
Quote:
Originally Posted by l0rdraiden View Post

4670k + Asus Plus

In the bios I have change the ratio to 44 for all CPU's.
Then I have enable the adaptive mode, the voltage adaptative offset field is set to Auto and the Additional Turbo Mode CPU Core Voltage field is set on 1.2

I'm running prime95 and the CPU VCORE has jumps up to 1.28, despite the limit is 1.2. I guess this is because the AVX instructions of Prime95.

If I increase the bclk to 120 and the multiplier to 36-37, That would mean that I can achieve also the same performance around 4.4ghz, using less voltage?
What other things are affected by the BCLK? ram freq?
I know how to lower down the RAM freq in order not to overclock it.
But what else would I need to lower down (because is affected by the BCLK) to only oc the CPU freq? CPU cache?

There is any warning against the use of BCLK for overclocking? any disadvantage?

What is the uncore? I can't find this setting in asus bios
And about the CPU cache? can I keep it in auto?
first of all, you won't be able to run 120MHz BCLK. you will be able to run 125MHz BCLK by changing the strap to 125MHz from the default 100MHz. 120MHz is still running in the 100MHz strap, and BCLK affects everything from memory, PCI-E, uncore. using 125 strap, you will still keep the others running at 100MHz (maybe uncore will get 125MHz as well - not sure as i have not tried it).

you will run into lockups and graphics corruption in games by overclocking the BCLK. stick to 100MHz since you paid for the K chip to live an easier life.

now, i don't know how the FIVR increases the Vcore when AVX loads are present. if it does by looking at the core clock, then you won't see a difference between 100x45 and 125x36. but if it does that by looking at the multiplier, then running 125MHz strap will make the voltage bump insignificant because 36x is almost same as stock multiplier. i guess you could be our guinea pig. XD

but since you have an Asus board, if your PSU allows your to enable C6, C7 states, then setting manual Vcore will still drop the Vcore to those low levels at idle as if it was using adaptive or offset mode. i would try this first. smile.gif

uncore is called Cache Ratio in Asus boards. initially when you are trying to find the best Core Clocks, set the min = max = 35 and set the Cache Voltage to AUTO. Once you have found the highest Core Clock that your cooling/guts let you achieve, slowly increase the cache ratio until you lose stability. never sacrifice Core multiplier for a higher Cache Ratio.
post #1979 of 19637
Quote:
Originally Posted by Spritanium View Post

I can't even get 4.2ghz at 1.3v.

If you ask me, Intel should offer free replacements for K chips that don't overclock well. Considering that's the entire point of the K chips.

No they shouldn't. Because everybody and their mother would want a new chip even if it hit 4.5 stable. They don't say you'll get a good overclock, they just allow you to overclock since it's an unlocked chip.
post #1980 of 19637
Quote:
Originally Posted by Anusha View Post

first of all, you won't be able to run 120MHz BCLK. you will be able to run 125MHz BCLK by changing the strap to 125MHz from the default 100MHz. 120MHz is still running in the 100MHz strap, and BCLK affects everything from memory, PCI-E, uncore. using 125 strap, you will still keep the others running at 100MHz (maybe uncore will get 125MHz as well - not sure as i have not tried it).

you will run into lockups and graphics corruption in games by overclocking the BCLK. stick to 100MHz since you paid for the K chip to live an easier life.

now, i don't know how the FIVR increases the Vcore when AVX loads are present. if it does by looking at the core clock, then you won't see a difference between 100x45 and 125x36. but if it does that by looking at the multiplier, then running 125MHz strap will make the voltage bump insignificant because 36x is almost same as stock multiplier. i guess you could be our guinea pig. XD

but since you have an Asus board, if your PSU allows your to enable C6, C7 states, then setting manual Vcore will still drop the Vcore to those low levels at idle as if it was using adaptive or offset mode. i would try this first. smile.gif

uncore is called Cache Ratio in Asus boards. initially when you are trying to find the best Core Clocks, set the min = max = 35 and set the Cache Voltage to AUTO. Once you have found the highest Core Clock that your cooling/guts let you achieve, slowly increase the cache ratio until you lose stability. never sacrifice Core multiplier for a higher Cache Ratio.

Many thanks for your answer, I think that I will let alone the BCLK xD
Regarding my PSU, is "Haswell ready", so it should work, I will try your advice using manual vcore.
And regarding the uncore/cache Ratio, what is the default in 4670K? 35?
I guess the idea of having min max at 35 is having it as maximum while testing the CPU freq stability? but once I find I uncore ratio that works... min should be auto and max the new value (35, 36...)
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