OVERCLOCKING GUIDE
THE BASICS OF OVER CLOCKING ARE QUITE SIMPLE. IT IS JUST A MATER OF FORCING YOUR CPU TO RUN FASTER THAN IT IS MEANT TO. NOW YOU CAN ONLY PUSH A CPU SO FAR. AND THE MORE SOPHISTICATED YOU WANT TO GET THE MORE YOU CAN SQUEEZE OUT OF YOUR CPU, MORE LATER. OK . THE HOW TO PART... AMD CPU'S FIRST... THE AMD CPU'S ARE NOT MULTIPLIER LOCKED, THIS MEANS THAT YOU CAN INCREASE THE MULTIPLIER TO EFFECT A OVER CLOCK, EG.
100MHZ BUS SPEED X 6 MULTIPLIER = 600MHZ CPU SPEED,, TO OVER CLOCK
100MHZ BUS SPEED X 6.5 MULTIPLIER = 650 MHZ CPU SPEED . ITS JUST THAT
EASY. NOW YOUR CPU MAY OR MAY NOT ACHIEVE THIS WITHOUT A VOLTAGE INCREASE. IF YOUR SYSTEM DOES NOT BOOT UP, OR RUN STABLE, A VOLTAGE INCREASE TO THE CPU WILL BE NECESSARY . NOW MOST PEOPLE DON'T RECOMMEND THAT YOU GO OVER 3 TENTS OF A VOLT , AND ONLY INCREASE THE VOLTAGE ONE TENTH AT A TIME , UNTIL YOUR SYSTEM RUNS STABLE. NOW THE OTHER WAY TO EFFECT A OVER CLOCK IS TO INCREASE YOUR BUS SPEED.. EG.
100MHZ BUS SPEED X 6 MULTIPLIER = 600MHZ CPU SPEED, TO OVER CLOCK
105MHZ BUS SPEED X 6 MULTIPLIER = 630 MHZ . NOW THE THING TO REMEMBER
ABOUT INCREASING YOUR BUS SPEED IS THAT YOU ARE NOT ONLY OVER CLOCKING YOUR CPU, BUT EVERYTHING PLUGGED ONTO YOUR MOTHER BOARD AS WELL, SOUND CARD, VIDEO CARD, RAM, AND ANYTHING ELSE THAT MAY BE PUT INTO A PCI SLOT. SO EFFECTING A SERIOUS OVER CLOCK WITH INCREASING YOUR BUS SPEED MAY NOT BE POSSIBLE .. . NOW THE THING TO REMEMBER IS THAT PENTIUM PROCESSORS ARE MULTIPLIER LOCKED. AND THE ONLY WAY TO EFFECT A OVER CLOCK IS WITH A BUS SPEED INCREASE...THE MOST SUCCESSFUL CPU'S FOR OVER CLOCKING ARE THE CELERONS, AND THIS IS BECAUSE OF THERE 66MHZ BUS SPEED. BEING MULTIPLIER LOCKED , MEANS THAT YOU INCREASE THE BUS SPEED, WITH MOST MOTHERBOARDS OFFERING 66, 75, 85, 95 , 100MHZ BUS SPEEDS ITS NOT TO HARD TO GET A SERIOUS BOOST FROM YOUR CELERON. THE 300A CELERON IS THE MOST OVER CLOCKED CPU OF OUR TIME...AT
66MHZ BUS SPEED X 4.5 MULTIPLIER = 300MHZ CPU SPED ...OVER CLOCKING =
75MHZ BUS SPEED X 4.5 MULTIPLIER = 338MHZ CPU SPEED
85MHZ BUS SPEED X 4.5 MULTIPLIER = 383MHZ CPU SPEED
95MHZ BUS SPEED X 4.5 MULTIPLIER = 428MHZ CPU SPEED
100MHZ BUS SPEED X 4.5 MULTIPLIER = 450 MHZ CPU SPEED
THE AMAZING THING ABOUT THE 300A WAS THAT IT COULD BE OVER CLOCKED A FULL 50% . AND MOST OF THE TIME WITH ONLY A GOOD HEAT SINK FAN COMBO TO KEEP IT COOL ENOUGH TO RUN . WITH MORE ADVANCED COOLING IT HAS BEEN KNOWN TO REACH 600MHZ + A FULL 100 % OVER CLOCK AND THEN SOME. AN IMPORTANT THING TO REMEMBER IS THAT 66MHZ, 100MHZ, AND 133MHZ, ARE NOW STANDARD BUS SPEEDS ON MOST BOARDS, AND ALL PERIPHERALS RETURN TO STANDARD OPERATING SPEEDS , THEREFORE MEANING THAT THE CPU IS THE ONLY COMPONENT THAT IS OVER CLOCKED, SO IF YOUR SYSTEM IS NOT STABLE AT 85MHZ, OR 95MHZ, IT MIGHT RUN FINE AT 100MHZ, AS IT COULD BE YOUR SOUND, GRAPHICS CARD OR SOMETHING OTHER THAN THE CPU CAUSING THE PROBLEM.
AMD K6-2-???
THIS PARTICULAR CPU CAN BE OVER CLOCKED , AND IT DEPENDS ON THE QUALITY OF THE INDIVIDUAL CPU AS TO JUST HOW FAR YOU CAN GO.. MY CPU WAS THE 500 AT 2.2 VOLTS. I COULD RUN THAT CPU AT 550MHZ STABLE AT 2.4 VOLTS WITH A STANDARD HEAT SINK FAN, THE ONLY SOFTWARE THAT GAVE PROBLEMS WAS INTERNET EXPLORER 5, IT WOULD GO ILLEGAL ON ME WHILE I WAS SURFING THE NET.. I HAD INCREASED THE MULTIPLIER FROM 5 TO 5.5.TO EFFECT THE OVER CLOCK. ONE DAY I DECIDED TO PLAY WITH BUS SPEEDS, TO CUT A LONG STORY SHORT. THE ONLY BUS SPEED IT LIKED WAS 105, SO WITH THE MULTIPLIER AT 5 NO VOLTAGE INCREASE , IT RAN 523 MHZ COMPLETELY STABLE .. IM NOW RUNNING A CELERON 566 FC-PGA ON A ASUS MOTHER BOARD. WITH A 8.5 MULTIPLIER AND 66MHZ BUS = 566 MHZ CPU SPEED. CURRENT SETTINGS 75MHZ BUS SPEED X 8.5 MULTIPLIER = 637MHZ CPU SPEED, I HAVE NOT HAD T O INCREASE THE VOLTAGE , THE SYSTEM IS ABSOLUTELY STABLE , AND THERE ARE NO CPU HEAT PROBLEMS, I EXPECT THIS CPU TO GO 800MHZ OR MORE WITH GOOD COOLING . ESPECIALLY IF I CAN GET MY HANDS ON A PELTIER..
updated 13.1.2001
OK SOME PEOPLE ARE HAVING TROUBLE WITH MULTIPLIER LOCKED INTEL CPU'S ,, YOU MUST ADJUST THE SYSTEM BUS SPEED TO AFFECT AN OVERCLOCK .. YOU MUST GO INTO YOUR BIOS, CHOSE SYSTEM SETTINGS AND HIGHLIGHT SYSTEM / PCI FREQUENCY , THEN HIT ENTER. A SCREEN SHOULD APPEAR THAT OFFERS YOU A SELECTION OF BUS SPEEDS AND CORRESPONDING PCI CLOCK SPEEDS. HERE IS AN EXAMPLE OF WHAT MY CUV4X OFFERS.
DEFAULT 66.9MHZ BUS / 33.45MHZ PCI CLOCK
68MHZ BUS / 34MHZ PCI
75MHZ BUS / 37.5MHZ PCI
80MHZ BUS / 40MHZ PCI
83MHZ BUS / 41.65MHZ PCI
85MHZ BUS / 28.3MHZ PCI
90MHZ BUS / 30MHZ PCI
95MHZ BUS / 31.67MHZ PCI
DEFAULT 100MHZ BUS / 33.41MHZ PCI
103MHZ BUS / 34.33MHZ PCI
105MHZ BUS / 35MHZ PCI
110MHZ BUS / 36.6MHZ PCI
112MHZ BUS / 37.34MHZ PCI
115MHZ BUS / 38.33MHZ PCI
116MHZ BUS / 38.66MHZ PCI
118MHZ BUS / 39.33MHZ PCI
120MHZ BUS / 40MHZ PCI
124MHZ BUS / 31MHZ PCI
126MHZ BUS / 31.5MHZ PCI
130MHZ BUS / 32.5MHZ PCI
DEFAULT 133MHZ BUS / 33.25MHZ PCI
135MHZ BUS / 33.75MHZ PCI
138MHZ BUS / 34.5MHZ BUS
140MHZ BUS / 35MHZ PCI
142MHZ BUS / 35.5MHZ PCI
144MHZ BUS / 36MHZ PCI
146MHZ BUS / 36.5MHZ PCI
148MHZ BUS / 37MHZ PCI
150MHZ BUS / 37.5MHZ PCI
155MHZ BUS / 38.75MHZ PCI
160MHZ BUS / 40MHZ PCI
166MHZ BUS / 41.5MHZ PCI
WOW!!. AS YOU CAN SEE , 100MHZ CPU'S AND 133MHZ CPU'S ARE WELL CATERED FOR IN THE SELECTION OF BUS SPEEDS...THE 100MHZ BUS CELERY WOULD BE IDEAL TO OVERCLOCK ON THIS SYSTEM , EXCEPT FOR ITS PRICE...OUCH!! AND IF YOUR SYSTEM ONLY USES MANUAL JUMPERS, THEN SIMPLY CONSULT YOUR USER MANUAL FOR THE , JUMPER SETTINGS FOR THE BUS SPEED YOU WANT. AND DON'T FORGET , SMALL JUMPS , PUSH YOUR CPU SLOWLY, HIGHER AND HIGHER. AND INCREASE THE VOLTAGE AS NEEDED... JUMPING STRAIGHT FROM 66MHZ BUS TO A 100MHZ BUS IS , MOST OF THE TIME, NOT REWARDED , WITH SUCCESS..
I WILL DESCRIBE IN DETAIL HOW I PUSHED MY CPU TO 850MHZ FROM 566MHZ THE VERY FIRST SETTING I WENT FOR WHEN BUILDING MY SYSTEM WAS [email protected] .. I NEVER STARTED WITH 566....EVEN THOUGH THE CPU IS A 566FC-PGA CELERON... FROM DAY ONE I WANTED MORE... (THE MADNESS) I LEFT THE CLOCK SPEED HERE UNTIL I GOT MY GEFORCE 2 MX CARD... THEN I STARTED PUSHING...I TRIED FOR 100MHZ BUS AT 1.7V FIRST BUT NO BOOT.. THEN AT 1.8V , BUT NO LUCK... I BACKED OFF TO 90MHZ BUS AT 1.7 AND IT BOOTED..765MHZ... THEN I TRIED FOR 95MHZ BUS AT 1.7V AND IT BOOTED 807MHZ. THEN I TRIED FOR 100MHZ BUS AGAIN , IT STOPPED WITH A WIN PROTECTION FAULT. I INCREASED THE VOLTAGE TO 1.75 AND IT BOOTED FOR 850MHZ BUT WAS VERY UNSTABLE. I RAN THE CPU AT 807MHZ FOR A DAY AT 1.7V . AT THE END OF THE DAY I WAS ABLE TO BOOT AT 850MHZ AT 1.7V.. MY 566CEL IS NOT THE BEST IN THE WORLD. THE FIRST TIME I STARTED MY SYSTEM THE CPU RAN HOT , REAL HOT...I TURNED THE PUTER OFF, AND 10 MINUTES LATER TURNED IT BACK ON , AND THE TEMP WAS NORMAL..??????..
THINGS TO REMEMBER
WHEN YOU FAIL TO BOOT ON AN OC ATTEMPT , THE SYSTEM MAY NOT WANT TO RESTART, HERE THE BEST THING TO DO IS TURN THE PUTTER OF AT THE WALL.. THEN LET IT REBOOT AT THE LAST SUCCESSFUL BOOT SETTINGS , THEN RESTART AND CHANGE THE SETTINGS WITH MORE VOLTAGE.. THIS I FOUND WORKED BEST FOR ME ...IN PUSHING THE CPU HIGHER...
UPDATED 5.March.2001
CELERON 566 FC-PGA
Ok this will be my last 566 update. I got the fop38 , and after testing found that the fop32 set up was the way to go. I can not say enough good things for the Global Win Fop32 , except that its the cooler for me. My current set up goes like this. 566 @ 807mhz 1.65v . My system at 807mhz is rock stable, ok , I cant make it lock up. Thank you fop32. It will even run at 850mhz stable, I can play all the quake I want at 850mhz , without the system locking up, the only problem being start up. It just will not restart at 850mhz. At 807mhz there are no restart problems at all. I think that this is a bios problem, as the set up is through the soft menu. Asus needs to update its manual jumper settings for the CUV4X MB for the higher multiplier cpu's that have come on the market. Until then Im stuck on 807mhz. The problem? Ok I think that at 100mhz bus there is a conflict as to the cpu's clock speed, default being 566 @ 66mhz bus, now 100mhz bus being a default bus speed , the bios refuses to see the 566 celeron as a 850mhz cpu, because it knows its a 566 cpu. At the other bus speeds there is no problem because the bios knows that the cpu is overclocked . So what is needed to beat the bios, is updated manual jumper settings from ASUS. Now Im only guessing as to the problem, as when I tried the default 100mhz bus setting in the bios for a def 850mhz cpu the system refused to start. But 807mhz will do for now, as I said , rock solid .
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