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Acceptable CPU Temps & Stress Tests

I found the latest prime with avx instructions was the biggest stress tester on my system. It found chinks in overclocks that were stable in IBT and regular prime. It also really brings on the heat.

Your temps are fine. With Ivy/Haswell, when they start to go over 90 degrees you should get concerned.
 
Thanks for the info Jono8, it's a shame there's not a way for the test to automatically stop based on a custom set max temp (as far as I know), but ill keep an eye on them as it runs through.
 
gjc10212 said:
Can you post a screen shot similar to mine?
Click to expand...

Hi, please find the below link to a screenshot of my current CPU Voltages:

http://postimg.org/image/zecl2qw7r/

I set the CPU Core Voltage to "Manual Mode" and was then able to see a similar list to yours (I have not yet saved this).

I can see the values are quite different to yours however.

QUESTIONS
What would you guys recommend for:

1) The new value to set the "CPU Core Voltage Override" to? I know to increase in small increments, would 1.125/1.130 be a significant start?
2) Would I need to change any of the other values?

Thanks again.
 
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For a start, try:
CPU core voltage 1.20v
System agent +0.250 offset.

You could also set Uncore (or Cache/Ring ratio, mobo dependent) to 39, your Cache volts should allow for that at their current setting. I get 39x Uncore with 1.176v, you may be able to come down a little from 1.260v on that one.
But start with the above, the rest can follow later.
 
And if you haven't already, find 'Load line calibration' (LLC) and set it to high or extreme, and PWM phase control to high or extreme. These with smooth out any lumps in the voltages, and give a more even power delivery.
They are probably lurking in 'Advanced Power settings' or something...

And just to add: I'm sure you already know this, but it is very difficult to bork your PC these days- mobos now will detect issues, and reset to default values if something isn't right. Unlike the olden days, where you had to keep your nose alert for the burning smell if you upped any voltages!
 
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dougal1331 said:
If I may add: usually considered best to go for direct settings, rather than offsets, where possible. My last mobo was el cheapo, and offset was my only option...
Click to expand...

Thanks for all the detail Dougal1331, one question on that, in post #13 you mentioned its ideally better to go for direct settings rather than offsets, have I misunderstood the details or is there an alternative configuration?
 
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Generally, you get three options, Direct input, offset, and auto. Offset merely takes the auto level, and either knocks a bit off, or adds a bit on, depending how you set it. Some motherboards (usually at the budget end) only offer offset options- direct input is usually considered better, as it takes out the variability of the auto+offset config.
There are issues involved with trying to OC with offsets- from personal experience with my last rig (2500K, Asus Z68LX) if I tried to get load voltages down as far as I could, the rig would crash when the CPU idled, as the voltage dropped too low.
Direct input is the best way to the lowest effective volts. Offsets can be used, but the direct method is preferred when available!
Don't worry too much about this; your mobo offers direct inputs or offsets- so I'd say use the direct method.
 
dougal1331 said:
Best way is to up it by 0.005 or 0.01v and try again- so if your vcore reads 1.2v, set it for 1.21v and have another go. Or you could try a positive offset (of 0.01v) instead, either way really.
If that doesn't do it, try 1.215v or 1.22v, and so on.
I think (brain fade) mine runs at 1.24v or thereabouts. Above numbers are for illustrative purposes only!
Click to expand...

Hi guys, ok, I tried upping the vcore slightly from 1.120v to 1.125 and unfortunately it didnt go so well, so wondering if I missed something else off?

I didnt change the LLC/PWM this time round as wanted to make sure I'm only making one change at a time to see what's happening.

These are the steps I took and results:

1. I changed the "CPU Core Voltage" to "Manual Mode". The first thing I found strange was that the "CPU Core Voltage Override" was pre-populated with 1.310 which I assumed was just a default value (higher than what I am looking to set it to) and changed it to 1.125 (as currently my "CPU Core Voltage" is 1.120V).

(click to view)



2. When I went to save the changes it gave a confirmation to change the override from 1.310 (which I'd never saved previously) to 1.125, so did I actually end up reducing the voltage or is this just an incorrect statement?



3. After saving Windows 8.1 wouldnt boot and i got this error:



Please advise.
 
1.125 is still on the low side.

1.200v is a good starting point for 4.4GHz. The 1.31v is what the mobo thinks you need (i.e. the 'auto' mode would set it to that.). If you change from auto to manual, whatever value the board had used will be shown in the window still.
You will need to hit enter after typing in the box too, otherwise it won't save the changes. (Yes, I've done that before...).
 
dougal1331 said:
1.125 is still on the low side.

1.200v is a good starting point for 4.4GHz. The 1.31v is what the mobo thinks you need (i.e. the 'auto' mode would set it to that.). If you change from auto to manual, whatever value the board had used will be shown in the window still.
You will need to hit enter after typing in the box too, otherwise it won't save the changes. (Yes, I've done that before...).
Click to expand...

Cheers for confirming how the 1.310V appears, so if the mobo thinks that's what's needed is that what it has used on auto? The reason I ask is that when speaking to technical support yesterday they said not to set the voltage to anything more than 1.35V, so is that enough variance to play with?

I tried 1.215 which this time was able to boot into windows but crashes instantly on a blend test in Prime95 (which is sooner than before).

What would you do next?
 
nomido_27 said:
Cheers for confirming how the 1.310V appears, so if the mobo thinks that's what's needed is that what it has used on auto? The reason I ask is that when speaking to technical support yesterday they said not to set the voltage to anything more than 1.35V, so is that enough variance to play with?

I tried 1.215 which this time was able to boot into windows but crashes instantly on a blend test in Prime95 (which is sooner than before).

What would you do next?
Click to expand...

In that case, this time put the +0.250v offset onto the system agent voltage. Turn on LLC, set it to Extreme. Might as well set Uncore/Cache ratio to 39 while you're there. Your cache voltage is already set high enough to accomodate this- it may even help stability, as the closer the core and uncore clocks are, the better.
1.215v on the core should be enough- I've just checked CPU-Z, and I'm actually at 1.198v vcore, not 1.24 as I said earlier...
If you prefer to do it one setting at a time, the order I've put them in would be the way I would go.

Try Prime again, keep an eye on temps. I'm quietly confident...
 
And the 1.31v, while within limits, is really getting towards watercooling territory, temp-wise. This is why we do it manually- mobos always add a bit for luck. I got my 2500K to boot to Windows at 4.8GHz once- opened CPU-Z and nearly fainted when I saw 1.54-1.6v across the chip. The recommended safe limit was 1.42v... I shut it down pretty sharpish!
 
Here's mine...
7rub1s.png
 
graham13092007 said:
I had the same problem with that mobo cpu ram bundle overclocked to 4.4 mine needed 1.296v to make it stable
Click to expand...

dougal1331 - thank you for the specific values and steps. Last night I tried out the Asus 4-way optimization (overclock in 1 click) tool (as referenced in my above post#34). It done a good job of overclocking my system to something stable (I ran Handbrake 100% overnight with no issues - it was crashing after 10mins before), the temps are now really good (~54 on load) and voltage stable around 1.2v.

Only thing is it's OC'd at 4.2Ghz and for some reason the Speed in the BIOS is now showing as 800Mhz. Using a tool means I dont really have full visibility of what it's changed/controlling and Windows Task Manager also seems to fluctuate heavily between 800Mhz and the maximum 4.2Ghz. Also because it's in Adaptive Mode it's not recommended to stress test it, so now with your above steps i'd like to give the Manual Mode another shot.

Graham13092007 - Thanks for the post. When you had these issues was it simply the voltage change to 1.296V that you amended or did you set any of the other parameters that dougal1331 has mentioned?
 
That auto-overclock has worked pretty well tbh.
I've been poking around my BIOS tonight, and got 4.5GHz stable now, with a 4GHz Uncore.
I'll give you my settings for 4.4GHz, here's everything I've changed in one list:

Multiplier 44
Uncore/Cache ratio 39
XMP enabled (If you haven't already enabled this, do it first, then restart and go back into the BIOS.)

Power settings:
Load-line Calibration (LLC)- Extreme
PWM Phase control- Extreme

CPU power settings:
Vcore 1.20v (You may want to go for 1.21v for a little added safety...)
Uncore/cache 1.175v
System Agent +0.250v offset

Everything not mentioned is left on auto.
Been using these settings for a while without a single problem. Just got 4.5GHz/4GHz tonight by tweaking the vcore to 1.21, and uncore to 1.180.

See how you get on with 4.4GHz first though. Bang in all the settings in one go. Good luck, see you on the other side...:cool:
 
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