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Okay so I did a quick stress test of my overclock and I have some questions relating to it.

post #1 of 16
Thread Starter 
I did 50 runs of Intel Burn Test on standard stress level and it passed. I used HWMonitor to monitor the voltages and it periodically dropped from 1.32-1.34 to 0.864. It wasn't as frequent as it was when LLC was set to disabled (LLC is at auto as of now). Is it normal for it to do that? It passed the stability test but there were a few voltage hiccups. I might try it with LLC set to enabled instead of auto.

My voltage for the CPU is set to 1.36 right now and my overclock is 4.1 ghz. My RAM is DDR3-1600 mhz and I didn't overclock it. I set it manually to 1.5v also. If these results are normal I'll try Prime95 later on.

If you guys need any more details let me know. The only three options for LLC on my bios are Enabled, Auto, and Disabled.

Also, I noticed the main menu cursor in Counter Strike: Global Offensive was laggy.
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post #2 of 16
Hi.
Pretty damn good voltage for a 4.1GHz OC. Nice CPU choice as well.
A mobo with a higher VRM count would help immensely in the voltage regulation. Set LLC to enabled. thumb.gif
EDIT
And I assume that all power saving features in BIOS are disabled.
Edited by Grmadness - 5/21/13 at 11:32pm
   
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post #3 of 16
Thread Starter 
Quote:
Originally Posted by Grmadness View Post

Hi.
Pretty damn good voltage for a 4.1GHz OC. Nice CPU choice as well.
A mobo with a higher VRM count would help immensely in the voltage regulation. Set LLC to enabled. thumb.gif
EDIT
And I assume that all power saving features in BIOS are disabled.
Yeah the power saving features are disabled. My bios is set back to stock. I'll load up the file for my overclock in the bios, have LLC enabled, and see if there's a voltage drop. If IBT says there's an instability I'll try raising the voltage up another notch to 1.37v.
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post #4 of 16
Voltage dropping clear down to .86 sounds like throttling.

Make sure Windows is set to High Performance mode in Control Panel, and double check the power saving features in the BIOS. Cool N' Quiet, APM, C1E, all of that.

I had to disable like 9 different things in my BIOS to stop throttling. Dont forget to turn off Turbo features either.

And just FYI, most shady overclocks will pass IBT on Standard. Try it on High. Eventually you want to pass on Maximum.

Have a look at this thread too: AMD FX Throttling Fixes
Edited by Baskt_Case - 5/22/13 at 1:16pm
    
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post #5 of 16
Thread Starter 
Quote:
Originally Posted by Baskt_Case View Post

Voltage dropping clear down to .86 sounds like throttling.

Make sure Windows is set to High Performance mode in Control Panel, and double check the power saving features in the BIOS. Cool N' Quiet, APM, C1E, all of that.

I had to disable like 9 different things in my BIOS to stop throttling. Dont forget to turn off Turbo features either.

And just FYI, most shady overclocks will pass IBT on Standard. Try it on High. Eventually you want to pass on Maximum.

Have a look at this thread too: AMD FX Throttling Fixes

Yeah but before I got my voltage up to 1.36 it was failing on the 15th or so test.

I also noticed that as soon as I clicked start to do the testing the voltage went from 1.36v to about 1.28-1.34 during testing with LLC enabled to auto at 1.36v. I'll try it with LLC enabled.
Edited by CannedBullets - 5/22/13 at 2:02pm
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post #6 of 16
Thread Starter 
Okay, so if I'm not overclocking the CPU-NB, I can just leave the speed (2000 mhz) and the voltage at their stock values right? Right now I'm just upping the CPU multiplier and voltage to try and get a stable 4.1 ghz and stable voltage.
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post #7 of 16
Yes, if you are only working on CPU overclock right now, leave the NB multiplier alone.

Your main focus will be CPU multi and voltage.

However, in some cases, including mine for example, a very small bump in CPU NB voltage can help to stabilize the system. This, just like CPU voltage, will increase heat.

And be careful not to confuse the motherboard northbridge and the CPU NB. They are two separate pieces of hardware with two separate voltages. I do not know the specifics of your motherboard, but on mine I can adjust both voltages.
    
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post #8 of 16
Thread Starter 
Quote:
Originally Posted by Baskt_Case View Post

Yes, if you are only working on CPU overclock right now, leave the NB multiplier alone.

Your main focus will be CPU multi and voltage.

However, in some cases, including mine for example, a very small bump in CPU NB voltage can help to stabilize the system. This, just like CPU voltage, will increase heat.

And be careful not to confuse the motherboard northbridge and the CPU NB. They are two separate pieces of hardware with two separate voltages. I do not know the specifics of your motherboard, but on mine I can adjust both voltages.

Yeah I can adjust voltages for both too. I just leave the mobo's northbridge set to auto and the CPU-NB set to its stock value. Hopefully having LLC on enabled will mean its stable.
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post #9 of 16
LLC stands for Load Line Calibration, and can indeed help to stabilize an overclock, and is generally a useful feature. These newer boards have much better LLC than some of the early ones.

Essentially, it helps to combat vdroop (voltage droop) under load. As the CPU starts doing more work, and wants to pull more power, the voltage can drop. LLC will try to keep up with the load demand of the CPU by slightly increasing voltage in order to keep up with demand.

At idle, my CPU sits around 1.42v, but under full load it goes as high as 1.48v with my LLC set to Auto and thats where I need to be in order to be stable with my 4.6GHz overclock.

Get to where you can make 10 runs of IBT on MAX, then try for 8 hours of OCCT. If your still good, then go for 8-12 hours of Prime95. That last one will be the trickiest to get stable on your FX chip, but if you can do that, you can rest assured you've got a solid overclock.
Edited by Baskt_Case - 5/22/13 at 11:54pm
    
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post #10 of 16
P95 is not recommended with BD/PD chips. Some have instability even at stock
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Overclock.net › Forums › AMD › AMD CPUs › Okay so I did a quick stress test of my overclock and I have some questions relating to it.