Overclocking I5 750

[surfzm]

Asrock P55 deluxe3 , Intel
G.Skill Ripjaws F3-12800CL7-2GBRH
cpu I5 – 750
ssd muskin chronos
cooler Zalman Performa CNPS10X ( 1350rpm)
radeon hd 5770 Msi Hawk
I have loaded bios optimized AHCI settings, put CPU clock ratio X15, memory to 6×133 = 798 ( 800 ),
VTT to 1.2, all others voltages are to auto mode, after that restarted the system and went back to bios where i adjusted bclk from 133 to 150, but then when I saved and reeboted I saw that my CPU clock is
downgraded to x9…

I have discovered that when i put to manual mode to set bclk, option thermal throttling is automatically enabled and it is not possible to disable it, the only way to do this is to load default bios settings again.

It seems that that function makes a problem.?!

so After that I have done smtg different : have loaded the optimized AHCIsettings ( thermal throtting is disabled ) and have done everything from the beggining but this time i downloaded octuner for Asrock, and tried to raise bclk from windows ( oc tuner ) , i have managed to raise it from 150 to 160, everything was stable ( real temp, Intel burn test 3x ), after that tried to raise it to 170 and computer crashed ( blue screen ),
from the second time I raised it to 165 ( everything stable ) .. 167 crashed again in first 10 seconds..
any suggestion?

ps I have also tried to downgrade bios …

miahallen February 1, 2012 at 7:37 PM
Can you raise the CPU voltage in the BIOS and then resume OCing in Windows?
If you have more questions, please post a new thread in the forums and we can assist you furthur

ps2 I have raised the cpu voltage from bios BUT when i do that thermal throttling became enabled and locked again..so it seems thats the main reason ( when i try to change cpu voltage, thermal throttling automatically become enabled and locked )

I have tried to change all other voltages ( manually ) and thermal throttling is not locked, BUT when i try to change cpu voltage then its locked
and multiplier changes from x15 to x9

I have loaded optimized AHCI settings again ( bios )..and put 800 Mhz DDR,
x15, VTT to 1,2 V, restarted computer and from windows ( Oc tuner ) raised cpu voltage
to 1.25 V. and then raised bclk from 133 to 150, then to 160 and then to 167 and
then everything crashed again like the first time ( blue screen).
help!

[miahallen]

Sorry for the delay...did you try more VTT? Also, did you drop the QPI link speed?

Oh, and welcome to TR

[surfzm]

I tried to raise VTT but still the same : at 167 everything goes down..

bios settings : ImageShack Album - 7 images

[Neuromancer]

The motherboard includes an "EZ OC" Feature up to 4.2GHz (You will max at 4 GHz on your chip as it presets 200BCLK and changes multi up to 21x)). Have you tried using that? If that works past 167 MHz you can check what settings it automatically sets for XXX speed and see what unique features is causing these other issues.

Not all boards are identical so sometimes things are added/removed or out right changed per motherboard company that makes diagnosing an issue like this a little harder than just assuming a BCLK hole.

But as Miah has pointed out recently to another user, that could be the case.

EDIT: Just checked your BIOS screens thanks

2 questions.

Overclock -Optimized? You set to manual does changing vcore still lock Thermal Throttling

a 33% bus increase and crahsing sounds to me like your memory failing.

Your BIOS screens are a little confusing because you manually set DDR3-800 but then you have XMP Profile set as well it look like. If you manually set your timings. then you should be good and might have just hit a whole as Miah mentioned yesterday in another post.. If not, then do so

EDIT2: Thermal throttling is automatically enabled when OCing you cant do anything about it. And for a 24/7 system it is better to leave it on anyway

http://www.overclockers.com/forums/s...d.php?t=634446

[surfzm]

I have tried everything from EZ OC, from 3,2 to 4,2, after I put ( for example 3,6 ) .. save bios settings, restart.. after that I can see from CPU-z and Asrocktuner that multiplier goes from 21x to 9x, bclk is not changed. .( so its for example 200, like it was in bios, but multiplier is changed from 21x to 9x )
The same happens everytime I change cpu voltage. ( multiplier goes from the number i put in bios 21x, 20x, 18x...always to x9 ).. I thought it was because of the speed step .. so i had turned on the prime 95 but multiplier still stayed the same.
1) Overclock -Optimized? You set to manual does changing vcore still lock Thermal Throttling

When I load optimized settings then thermal throttling is disabled and not locked..
Multiplier is 21x, bclk 133...and i can get 2,8 ...so from there I can continue to overclock from windows with oc tuner..(because if i try to manually change bclk in bios then when i restart to windows multiplier goes to x9...)
So from windows the highest number I can achive is 167.... ..


2) a 33% bus increase and crahsing sounds to me like your memory failing.
I have test the memory with memtest+ .. two passes everything was fine..
3) Your BIOS screens are a little confusing because you manually set DDR3-800 but then you have XMP Profile set as well it look like
I tried to get DDR3-800 with xmp profile because thats the default memory speed (G.SKILL-Products ) but when i do that .. memory is on 800.. but multiplier goes from 21x, 20x ..18x..to 9x...( I see that from windows after i save and restart ) and somethimes its hard to load windows..
So I loaded optimized settings again x21 bclk 133... but from there the highest I can choose is 666 Mhz..and then i manually set the timings.. 7 7 7 24
I would like to thank u and Miah for helping me.. I would really like to suceed in doing this with his great manual.. J...
The only thing is can do is to remove the cpu and to put it again...but i dont know if that a good idea because of the temperatures which are normal..

http://img442.imageshack.us/img442/333/upload11.jpg

the best i have achieved :

http://img836.imageshack.us/img836/4176/doc21.jpg

[miahallen]

I don't think re-seating the heatsink will do any good. It seems like this board is just too limited to push further

But 3300MHz is pretty decent for an everyday rig....it should perform well at those settings

[Neuromancer]

Clocking in Windows will always be limited. It used to be due to something called straps. I am not sure if they still call it that or not, but the principle is the same, you can't expect more than 10% or so from windows clocking except via CPU multiplier.

If you notice, you can not change the memory multiplier in windows either.

For benching however you can eek out that last little bit when you can't POST at a given setting.

In this case I would try setting your BIOS up to boot at 165. Then try windows clocking to see if you are still limited to 167.

I wish I had ANY experience on AsRock products so that I could help more, I generally stick with certain products because I am used to their quirks. Learning a new companies products can take a while, just like learning a new architecture when it comes to clocking. Foxconn on X58 was a real blast since they name EVERYTHING in BIOS almost exactly as Intel lists it in their whitepapers (which no other company does). IE QPI PLL became IOH VCCA 1.1 and PCIE voltage was IOH VCCA 1.5

[surfzm]

In this case I would try setting your BIOS up to boot at 165. Then try windows clocking to see if you are still limited to 167.

If i do that than multiplier goes to x9
I give up .. )....thank you for helping me...

...it seems smtg is wrong with the board.. today, for the first time I couldnt load windows...entered at the Bios and the hard disks were changed ..the first one SSD muskin ( with the windows ) became last so it couldnt boot..but except that I have just realized that Core speed is 1200 Mhz...( multiplier is changed from 20x to x9 ....)

[Neuromancer]

Sounds like BIOS reset automatically from failed overclock.