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Old 04-22-2008, 03:39 AM   #11 (permalink)
PeepingTom
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Join Date: Feb 2008
Posts: 42
OS: WinXP SP2


Re: Bios reseting fsb clock oc

Quote:
Originally Posted by PeepingTom View Post
Alright! The problem might be solved! Unbeliavable...what am i gona do with my life after that?? No problem to solve anymore...ill throw away my computer and buy a new one!

Nah, ok. I found something in the gigabyte formu...but its in german. So i try to translate it as good as i can...
Seems gigabyte have a well known bug, that has to do with the memory multiplier. Its strange acctualy, cause the article is about earlier boards with p35 chipset...(well, i think i also saw a post there, that refers to a ds4 board) ok, they are not old yet, but that theres still the same bug on a x38-ds4 board makes me think (that the gigabyte engineers are a bit of lazy).
Well, whatever...looks like, that on my board, the only memory multi that works fine is the 2.5 one. Since i have set that multi, the board does the on-off-on nomore...i hope im not too early with this post...;)
The bug is in the memory multiplyer. When you set the wron ram multi, the bios will reset if everytime you coldboot the pc.

Copy/paste:

Examples for Ram-Multis:

(G)MCH strapping
x.xxA -> 266MHz
x.xxB -> 333MHz
x.xxC -> 200MHz
x.xxD -> 400MHz


FSB800 z.B. E4300, E4500, E2160, E2180 usw...

Strap200 and the right Ram-Multis...
P965 = [2.66] [3.33] [4.00]
P35 = [3.33] [4.00]
X38/X48 = [2.66C] [3.33C] [4.00C]


FSB1066 z.B. E6300, E6320, E6400, E6420, E6600, E6700, Q6600 usw...

Strap266 and the right Ram-Multis...
P965/P35 = [2.00] [2.50] [3.00] [4.00]
X38/X48 = [2.00A] [2.50A] [3.00A] [4.00A]


FSB1333 z.B. E6550, E6750, E6850, E8200, E8400, E8500 usw...

Strap333 and the right Ram-Multis...
P35 = [2.00] [2.40] [3.20]
X38/X48 = [2.00B] [2.40B] [3.20B]


FSB1600 z.B. for new 45nm EE CPUs

Strap400 and the right Ram-Multis...
nur X38/X48 = [2.00D] [2.66D]

I first had to understand, that the right multis foe a q6600 are the "A" ones...cause the bios is telling folowing:

...This means: Q6600 is by default running on 266mhz with a multi of x9 =2.4ghz. So you use only the x.xxA Ram multis.
For cpus that run by default on 333mhz fsb, you only use the x.xxB multis. I think the way i understood this first, that u use the x.xxB multi when you overclock to 333mhz fsb is wrong.
Got it? ;)
I hope i explained right.


So, for whoever has this problem, heres my bios settings that work (on a x38-ds4):

Multiplier: x9
FSB Clock Freq: 348
Pci-e frequency: 100

Memory multiplier: 2.50A
800mhz > 870mhz

Memory Timings 5-5-5-19

Vcore: 1.2430 ...or lower/higher...depends on chip...

No voltage raised anywhere else.

For everyone who speaks german, heres the link:

http://62.109.81.232/cgi-bin/sbb/sbb...how=533&start=
Oho...Its not over yet! ;)
Theres seems to be one last thing, that has an efect on on-off-on... The Auto or-Smart fan control option in "pc health" in bios.

I never had problems since i found the solution, wich is describes above. At this time i had disabled smart fan and had speed fan controling my fans. In my verry first post above, i felt a bit like the new gpu cooler caused the trouble...because i never had the on-off-on before i changed the gpu cooler and pluged it onto the mainboard, so speed fan could controle it. However...a few days ago i decided to enable the smart fan option in bios again cause the full on spinning coolers at startup made me nuts (speedfan can control the fans anyway, even this option is enabled..it just overides it when windows is started up). So i set it to voltage controlled ...cause its the only way to have the bios controlled the fans with only 3 pin plugs. Since i enavled this option, the on-off-on was back again every time i booted cold. Funny, eh?
I disabled smart fan again... All fine...
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