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post #6411 of 9370
OMG ph34r-smiley.gif

Just wanted to give a go to overclocking my 2500k on a p8z68-v gen3. Not that I really need it, but what the hell, if it's doable ...

Being a lazy man, I gave the Asus auto-overclock (from bios, no AI Suite crap) a chance: 1 click = 4.327 Ghz with a CPU-Z Vcore (under load) of 1.328V.

Just to put a bit more effort in it, I manually modified some stuff: Bclk to 100.0 (it was 103.0), multiplier 45, manual vcore 1.340V. No 12hrs blend test yet (I'll run it asap), but I pass the 1344 and 1792 (a few minutes each). Case fans (Fractal Design Arc Midi) are at minimum speed (40%) and the Thermalright Macho fan goes to 1030 RMP max (fan max is 1300 RPM).

Geez, that was hard. Not.

Is it that simple ?

MaX.

P.S.
I noticed that at idle the CPU was going down to 1.6Ghz: it was not the case before (with Asus default settings). Funky !
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Pascalina
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post #6412 of 9370
Quote:
Originally Posted by HornetMaX View Post

OMG ph34r-smiley.gif

Just wanted to give a go to overclocking my 2500k on a p8z68-v gen3. Not that I really need it, but what the hell, if it's doable ...

Being a lazy man, I gave the Asus auto-overclock (from bios, no AI Suite crap) a chance: 1 click = 4.327 Ghz with a CPU-Z Vcore (under load) of 1.328V.

Just to put a bit more effort in it, I manually modified some stuff: Bclk to 100.0 (it was 103.0), multiplier 45, manual vcore 1.340V. No 12hrs blend test yet (I'll run it asap), but I pass the 1344 and 1792 (a few minutes each). Case fans (Fractal Design Arc Midi) are at minimum speed (40%) and the Thermalright Macho fan goes to 1030 RMP max (fan max is 1300 RPM).

Geez, that was hard. Not.

Is it that simple ?

MaX.

P.S.
I noticed that at idle the CPU was going down to 1.6Ghz: it was not the case before (with Asus default settings). Funky !


CPU idling down to 1.6 GHz is normal, that's the Enhanced Intel Speedstep function working correctly. (along with C1E state enabled). Switching the BCLK to 100 is a solid plan.

 

Your core voltage sounds awfully high for that frequency. That's what I run for a 4.7 GHz OC. If the automated settings for 4.3 GHz gave you 1.328V then you should be fine at 1.328V at 4.4 or 4.5 GHz. (They seriously overvolt in the automated settings.)

 

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post #6413 of 9370
Quote:
Originally Posted by shad0wfax View Post

CPU idling down to 1.6 GHz is normal, that's the Enhanced Intel Speedstep function working correctly. (along with C1E state enabled).
I know. The funny thing is that with Asus default settings (prior to auto-OC), this was not happening: speedstep enabled, but cpu-z shows the cpu is always @ 3.3Ghz. Strange ...
Quote:
Originally Posted by shad0wfax View Post

Your core voltage sounds awfully high for that frequency. That's what I run for a 4.7 GHz OC. If the automated settings for 4.3 GHz gave you 1.328V then you should be fine at 1.328V at 4.4 or 4.5 GHz. (They seriously overvolt in the automated settings.)
If I set the manual Vcore at 1.320V or 1.330V, I fail the 1344 test after a few seconds.

The automated setting however was using the offset mode vcore, with the offset value set to "Auto". 1.320V / 1.328V is what I had in CPU-Z under load with these automated settings.

I didn't change anything with respect to the auto-OC beside what said above (bclk, multiplier and manual vcore). Didn't touch the current capability (100%), Phase control (auto) nor VRM frequency (auto).

That said, if these simple settings pass the 12hrs blend, then I'm not sure I'll chase a lower vcore: 1.368V is well withing what's considered safe, right ?

BTW, at 4.5GHz, my VID is 1.371V

MaX.
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post #6414 of 9370
Quote:
Originally Posted by shad0wfax View Post



Better yet, get out of the basic BIOS and stick to the advanced BIOS and forget ever messing with Asus presets again!

No presets here. Running an easy 44x OC with -0.015v offset. I ran some tests a while back on the SS issue and enabling/disabling/auto C states. I'll have to dig up my notes (if possible) to see what I did.

... does some searching...
Ah yes... back in post 267, I posted: "I have learned that it doesn't matter if EIST is enabled, speed step is disabled until I enable any of the C options... C1E, C3 report, or C6 report. If I leave them in auto, it stays in turbo. All I need to do is change any one of those from auto to enabled and the EIST works as expected."

Furthermore, I think I found that for whatever reason, I got lower voltages with C3 and C6 enabled.

Looks like I didn't exactly remember what I did 2 months ago. wink.gif
Edited by speedlever - 2/11/12 at 3:43pm
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post #6415 of 9370
i have been using my p8z68-v/gen3 for about a week, so far so good thumb.gif
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post #6416 of 9370
Quote:
Originally Posted by porksmuggler View Post

There's several different causes, but wongnog needs to run Memtest first in each configuration. Start with dual channel A2/B2 (assuming errors), then try one stick at a time in A2 (assuming no errors), then finally try one stick at a time in B2 (this ones critical if the others produce the assumed results).
Most likely, it could be a defect on the board in channel B, or one of the sticks is defective, but you will need Memtest to test further. It could end up being a memory compatibility issue with this memory on this board, but you need to rule out defects first.
*edit* obviously ensure the memory is operating at its recommended timings and voltage in the bios

With my laptop, I already ruled out everything. I tested each stick individually using all four DIMM slots and they were error-free. The ONLY time it produces errors is when I use both sticks in dual-channel configuration.

I'm running the sticks on stock configuration because the BIOS of my laptop has no options to set voltage and timings. My RAM modules are rated JEDEC 16000MHz 1.5V CL9. My laptop is a Sandy Bridge laptop with a 2670QM CPU.

What else could cause this? I already RMA'd the kits but the brand new replacement kit that I received was also having the same results.
Quote:
Originally Posted by selluminis View Post

I had C1E and Speedstep enabled (not auto) and had high performance on. C3 and C6 are disabled. It did not work until I changed it from high to balanced. Unless there is some other setting that I have set incorrectly.
Quote:
Originally Posted by Fever View Post

i have been using my p8z68-v/gen3 for about a week, so far so good thumb.gif

Then I think you have other settings that were set incorrectly. Many members here have the same settings as mine and they get Speedstep working properly. FYI, using Balanced instead of High Performance would probably sacrifice a little bit of SSD performance.
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post #6417 of 9370
Quote:
Originally Posted by kevindd992002 View Post

Then I think you have other settings that were set incorrectly. Many members here have the same settings as mine and they get Speedstep working properly. FYI, using Balanced instead of High Performance would probably sacrifice a little bit of SSD performance.

I am doing a system revision next weekend. Going to mod case, etc. I will mess with it then. Thanks for the info.
post #6418 of 9370
Quote:
Originally Posted by selluminis View Post

I am doing a system revision next weekend. Going to mod case, etc. I will mess with it then. Thanks for the info.

No problem. Good luck mate! smile.gif
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post #6419 of 9370
Wow turns out one of my DIMMs is riddled with errors, over 10000 in 40 sec of memtest. Time to see how good mushkin's lifetime warranty is!
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post #6420 of 9370
Quote:
Originally Posted by HornetMaX View Post

If I set the manual Vcore at 1.320V or 1.330V, I fail the 1344 test after a few seconds.

The automated setting however was using the offset mode vcore, with the offset value set to "Auto". 1.320V / 1.328V is what I had in CPU-Z under load with these automated settings.

I didn't change anything with respect to the auto-OC beside what said above (bclk, multiplier and manual vcore). Didn't touch the current capability (100%), Phase control (auto) nor VRM frequency (auto).

That said, if these simple settings pass the 12hrs blend, then I'm not sure I'll chase a lower vcore: 1.368V is well withing what's considered safe, right ?

BTW, at 4.5GHz, my VID is 1.371V

MaX.


1.368 Vcore is a perfectly fine voltage for the 2500K. The "safe" 24/7 "user limit" most people believe in is around 1.410 Vcore or 1.420 Vcore.

 

You can bump the current capability up to 140% and you'll get much more performance out of your OC in terms of flop/s and, in theory, you won't have to change any other settings. (It just removes some throttles that are safe to remove and are holding back your CPU.) I have my current capability at 140% even when I'm at 4.9 GHz and 1.406 Vcore. It's also normally best to put Phase Control to Extreme and VRM frequency to Manual 350. This would probably solve your blue-screen problems and allow you to get a higher OC frequency with the same settings or else use a lower Vcore with the same OC frequency.

 

My VID at 4.7 GHz and 100% load on all cores is considerably higher than your VID and yet I'm at a lower voltage than you and stable at a higher frequency. Again, my guess is that there's plenty more room in your OC if you try out the above tweaks.

 

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