I've tried overclocking my cpu to 2.72 ghz and it was stable @ stock voltage. Then i try to set my FSB to 1333 , the computer does boot up , but the FSB rate is automatically set to [Auto] in bios after rebooting. I do have my voltage increased to 1.35 V , HT - 1.36V , DRAM - 2.1V , NB- 1.4V , SB - 1.6V,yet i've also disabled the Saving power features in configuration.However, i tried to set it back to my 2.72ghz configuration, but the bios still set the FSB back to [Auto]. The bios keeps reseting the FSB rate to [Auto]. What should i do to stop it?



This post has been edited by Riggo: Dec 26 2008, 01:51 PM

reset cmos...

CMOS has been reseted , but im still getting the same result. Bios does save Voltages and others , but the FSB and Memory MHZ will be reseted to [Auto] which is default without showing any notice. ><

i had read some reviews about this mobo,
its overclockabilty is low..

All asus board have this problem when it detects wrong voltages selected, setting [AUTO] is useless when u r overclocking on this board. I've been having this problem on my P5N-D for quite sometime before i figure it out. In order to pump up the FSB, u need to raise the NB, HT, SB voltage in order to keep the board at the settings u want or the BIOS will reset or fail to POST.

For Example:
I'm using my E8400 @ 3.8ghz now, with 4 ram modules (if u have 2 modules, u can set the NB, HT to lower)

NB: 1.52v
HT: 1.52v
SB: 1.6v

CPU: 1.3125 (with vdrop its 1.264v)
RAM: 2.11v @ 4-4-4-15 timing
FSB: 1688mhz @ 422mhz ram speed (sync mode, 1:1 ratio)


Note: Check your ram voltage first before pumping it high.

i've set my voltages as u stated, but the result is still the same.

You are sure NB 1.5v? Normally it needs not exceed 1.35v.

@TS,update to latest bios before doing anything first

No way 1.35v is enough for 4 ram modules on nvidia 750i chipset. The default is 1.32v if set to [AUTO]

as long as theres a fan slapped onto the NB heatsink to keep the temp down. it is ok.

This post has been edited by presto86: Dec 26 2008, 06:10 PM

bro, mind taking ss of ur bios?? like that can help u more

it reset the fsb to auto because your OC is fail, this is the CPR function form asus board, it allow u to boot without manually reset the cmos..

I've already updated my bios in the first place.

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Added on December 26, 2008, 8:10 pmMy first try was successful and i tried to reset it to the configuration same as my first time oc , but it still keeps changing back to [Auto].


CPR function will reset everything including voltages and others, but apparently only the FSB is set to auto and others setting are still being saved, therefore i dont think CPR is the problem.

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Added on December 26, 2008, 8:12 pmThis mobo is decent in oc'ing if im not mistaken , there are many people who have been successful to overclock to 3.6 or higher ghz by using this mobo.

This post has been edited by Riggo: Dec 26 2008, 08:12 PM

it reset to default for all setting when serious failure i guess, for small problem, i revert back the fsb only if i not remember wrong. because everytime i fail it boot at stock fsb and i can continue OC from there, no need to set all setting again..

May i ask, hows the temperature of your cpu like in your BIOS?

Try this,set 1200FSB first then raise on 20FSB incremental each time till it hit 1333FSB,might help

around 4x C

EDIT: Im curious why the voltage shown in cpu-z and other softwares is 1.240V , but my BIOS voltage is set to 1.31V , seems weird. , Does anyone know how to fix this?

It does work after the CMOS battery is taken out , but however when i tried OC few times , the AI will automatically disable the FSB option by setting it to Auto always.

May i know what voltages should i fill in below the list?

Core V:
HT V:
DRAM:
NB V:
SB V:

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Added on December 26, 2008, 10:53 pmIt does help me revert back to Auto , but after that i wont be able to change the FSB , it keeps changing the option to Auto.

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Added on December 26, 2008, 11:10 pmThis method works , but still having the voltage problem stated above. , im afraid the BIOS will be reseted again if i go any higher FSB , since the voltage seems stuck @ 1.280V

This post has been edited by Riggo: Dec 26 2008, 11:52 PM

[quote=Riggo,Dec 26 2008, 10:48 PM]
around 4x C

EDIT: Im curious why the voltage shown in cpu-z and other softwares is 1.240V , but my BIOS voltage is set to 1.31V , seems weird. , Does anyone know how to fix this?

It does work after the CMOS battery is taken out , but however when i tried OC few times , the AI will automatically disable the FSB option by setting it to Auto always.

May i know what voltages should i fill in below the list?

Core V:
HT V:
DRAM:
NB V:
SB V:

dats bcos there's vdrop... u set 1.31v on bios but ur mobo vdrop it to 1.24 lor... ur vdrop quite teruk lor...

y dont u try set fsb to 333, vcore set 1.4v, dram set 2.1v, nb set 1.4 see... actually i oso duno how ur bios looks like so duno how to reli guide u >"<

Find vdroop mod??
Should be able to add some voltage??

Alright, heres a pic of P5N-D mobo, can someone enlight me where should i do the pencil mod?

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Added on December 27, 2008, 1:11 ambro ibenq, logon MSN , gonna ask u some questions regarding to this, tq sifu. ^^

This post has been edited by Riggo: Dec 27 2008, 02:11 AM

are you serious about doing a pencil mod? i have -0.05 vdrop on my P5N-D and i still manage to OC. I don think pencil mod will solve ur issue.

Aight, i've successfully oc'ed it to 2.92Ghz stable tested with Prime 95 but using stock cooler >< , the temp of core 1 is 50 C @ idle and others are 4x C , are the temps too high for my cpu? What is the max fan speed of stock cooler? 2700 RPM?

This post has been edited by Riggo: Dec 27 2008, 04:58 PM

3.5K RPM if not mistaken. Anyway, 50'C at idle is hot...

What's the temp at load?

load @ 6x C , is there any way to max out my CPU fan speed at startup? Its running @ 1.28V @ 2.93Ghz

Core 1 temp reaches 83 C when Prime 95 is loaded, the temp seems increased drastically in heavy load . I've also remounted my cooler serveral times and re-applied the thermal grease using Tuniq-TX2, but it doesnt help at all.

This post has been edited by Riggo: Dec 27 2008, 10:53 PM

Well Q6xxx series does run hot, so I'm not surprised at those numbers on the stock HSF. The only way you're gonna get more frequency out of that processor is to either buy an aftermarket HSF, or lap it.

@TS,get a HSF would help the situation by a lot

what HSF do you recommend? ><

recommend my cooler hahaha... nak nak? can discuss in msn

after get u can then oc ur q6600 kao kao to 4ghz and idle temp will still be less than 50c... around 45c... but load temp u noe la

This post has been edited by iBenQ: Dec 28 2008, 06:42 AM

lolhalol was selling a Xigmatek Achilles bundled with its Crossbow kit for only RM120 a few days back. I'm not sure whether he's sold it...

First choice:
Liquid Cool
Second Choice:
TRUE/Copper lapped,washer mod
Thermalright IFX14
Third:
OCZ Gladiator Max + Xiggy 775 backplate
Deepcool KW
Sunbeamtech CCF

Hey , i've got a list o fewf coolers here and advices are expected ><

Foxconn Napoleon heatsink 775 LGA
Sunbeam CCF
Killer whale

CCF or Killerwhale is best bet,contact tkh_001,price quite ok and he nice guy to talk cock with

It depends la... All perform quite well next to each other... I went for Achilles because I like the way it looks

What about Xigmatek S1283? it seems good but with 3 heat pipes.

HDT-S1283 is a very good performer, priced at <RM130 new
HDT-S963 is another good performer, priced at only <RM95 new

This post has been edited by Silverfire: Dec 29 2008, 03:23 AM

Hmm , im having problem on choosing a HSF between killer whale or sunbeam >< , which one is better?

If me i will go CCF ... Because the HSF really good ... This my recommend ..

there's a thread about asus mobo i guess. might want to try this forum.lowyat.net/topic/657276

BS the mobo cannot oc well...

Its the technique... at 3Ghz, voltage should be 1.35, not auto. My Q6600 + P5N-D combo can reach 3.93

If q6600 no OC... izzit still fast enuff or not? or must OC?

Yes la. My P4 2.4GHz also can play undercover