How to overclock my P2 400mhz

[postalservice14]

How do I over clock my Intel Pentium II 400 Mhz Processor? It's on a Gigabyte GA-6BXC Intel 440BX AGPset Motherboard. I know nothing about overclocking except that you have to keep your processor very cool. Other than that can someone help me?

John

[$1500-P4 gamer]

Intel has locked multiplyer so only way to boost it is through the fsb.Raise in one step increments and test for stability.Use a mem,hdd.graphic,and proc-stress test(sandre comes to mind).Also watch temps.You must set speed in bios.If you are not familiar with bios you should learn more about it before takeing that leap.You will also void all warrenty's on that machine but judgeing by its age they have expired anyways.

[tricktx]

I own a P 2 333 on a Atrend ATC 6220 motherboard and the multiplyer ISNT locked. So i have changed the multiplyer to 5xand the FSB to 112MHZ thus 660MHZ nearly 100%icrease with the standard heatsink and an extra fan (runs at 45 degrees). So you can change the multiplyer on P2's as well as the FSB

[$1500-P4 gamer]

tricktx-All P2's are clock multiplyer locked.The P2 333 is a Katami core which is on the .28 fab I believe.Point is it ran at 66mhz fsb@stock.It wasn't untill the Deutches core P2's that it used 100mhz fsb.I had one of both.

So your 5x LOCKED multiplyer is at this on dif. FSB's (RAM,CPU &MEM.bus)along with pci oclocks.

CPU lock FSB@stock pci bus
5x 66mhz(pc66sdram) diviser of 1/2 66=33mhz pci
='s cpu speed 330mhz(they round it up=333)

CPU lock FSB o'clocked-100 pci bus
5x 100mhz(pc100) divisor of 1/3 100=33.3~
='s cpu speed 500mhz(o'clocked)

CPU lock FSB o'clocked 112 pci bus
5x 112mhz o'clocked diviser of 1/3 112=37.3~
='s cpu speed 560mhz(o'clocked)

As you can see it is locked.His is on the 100fsb as yours is the first p2 that was on the 66mhzfsb.His is a Deutches core P2 400 on a 100 fsb.I had a p2 400.I gave mine to my mom,still works good.She uses it all the time.I also had a 233mhz that was based on 66mhz fsb.Pc 100 was still expensive then.

[$1500-P4 gamer]

The Only way to O'clock that P2 is the FSB.Trust me,I know.But be careful a pci of 40 is likely your limit.

So
if cpu lock is 4x and fsb is 120mhz the pci=40mhz.Other stuff might cause hangs at this point other than CPU.Just keep that in mind.
That ratio will give you 480mhz.Now if you want more I think the BX(if memory serves me right I had one)supports 133mhz you can get pc133mhz ram.Run it at fsb133 and the multi- changes to 1/4.THat gives you a stock pci bus of 33mhz so other devices are stable and only O'clocking is the CPU. This would give you 4x133fsb=532mhz.Thats pretty good,you can go higher but I don't know if on that board.One has more room to bump up the fsb on a 66mhz based p2' but your is dif. than his.Remember though O'clocking is risky so be careful and test everything for stability as you increase fsb one step at a time.Just crank it up and you may regret it.Not all chips have the same ability to exceed stock speeds.

[Rugor]

To follow on to what Gamer has said.

The BX chipset in some iterations had partial support for the 133MHz FSB though not all boards utilized it. There are two things to watch out for when overclocking on BX: PCI and AGP speeds. Most BX boards supported a 1/2 and 1/3 PCI divider, with some of the later ones supporting a 1/4 divider. As the bus speed rises so do both PCI and AGP. If the board supports it the PCI bus will usually drop to 1/4 after about 41MHz (123MHz FSB), but the BX chipset doesn't support any AGP divider less than 2/3. This means at a 133MHz FSB your AGP is running at 89MHz, and a lot of cards can't run that high.

Also one point of correction Gamer, the 66MHz PII was the Klamath at 0.35 microns. Katmai was the 512kb cache original PIII.

[$1500-P4 gamer]

"Also one point of correction Gamer, the 66MHz PII was the Klamath at 0.35 microns. Katmai was the 512kb cache original PIII."

Sorry-got my original cores mixed up.The two K's.Intel should pick easier to remember core names like AMD has.I had the coppermine P3-600 myself.As for the fab. I was just takeing a stab in the dark. 0.35 that seems huge by todays standards don't it.Intel's on the .13 now and moveing on.Its unreal when you look back a couple years.Man my p233 was a big boy when I got it.Thanx for the correction though rugor.Peace!

[Rugor]

I know, I know, we've come a ridiculous distance.

My current computer's FSB is twice the processor speed of the computer I was using at the beginning of 1999. I have more L1 cache on this machine than the Vic20 and Atari480 we used to have had in combined main memory.

[$1500-P4 gamer]

I remember video that had two colors!Don't remember the video mem. but I didn't think it was worth takeing note back then.

Now I have more mem. on G3 than I did sys mem on my P2 and the video ram is way faster.Who would have ever thought that video cards would ever pack this much power.I mean the 486 33mhz(with the WOW of built in math co-proc.) I had was 256k cirus logic video.Just the fact a pic showed up on it was a miracle.Yep had 3.1 on that bad boy and a huge 500mb hdd.God I thought it would be forever till I'd need a new hdd.Then win'95 came out and HDD,ram and cpu requirements went through the roof.Heck I remember when they talked about the new cds.I remember going from my Black Sabbeth 8-tracks to cassette.And in car 8-track players where awsome!Media storage,PC's it all developes so fast.Man I'm feeling old so I'll stop now.Later!

[Godfodda]

Just an FYI, the P2 400 slot 1 can be unlocked. Gimme a minute to track down the info.

EDIT: LINK

[$1500-P4 gamer]

That is a cool tweak.I didn't know that even existed.I have a P2-400 I gave my MOM.Hmmm.Na!She wouldn't know if it was running hot and the thing would blow up.Cool article though.

[tricktx]

i dont meen to be funnt or owt but my P2 multiplyer can be changed manually. it even tells you in the motherboard manual. Its an Atrend ATC 6220 which has 66/100MHZ FSB and 3.5x to 7x multiplyer. e.g
for 3.5x
Switch1 ON
Switch2 ON
Switch3 ON
Switch4 OFF

for 7x
Switch1 ON
Switch2 ON
Switch3 OFF
Switch4 ON

so on mine you can i have changed it many times from 450 MHZ 4.5x100 to 500MHZ 5x100

[Godfodda]

Originally posted by tricktx
i dont meen to be funnt or owt but my P2 multiplyer can be changed manually. it even tells you in the motherboard manual.

You may have a CPU from the pre-lock days or maybe an engineering sample. But all Intels (except ES) have been multiplier locked since sometime in '98.

Most decent motherboards do provide a way to change the multiplier, but it's useless on a locked CPU. It makes no changes. WCPUID or something similar will show what the actual operating multiplier value is.

[Godfodda]

Originally posted by $1500-P4 gamer
That is a cool tweak.I didn't know that even existed.I have a P2-400 I gave my MOM.Hmmm.Na!She wouldn't know if it was running hot and the thing would blow up.Cool article though.

One of my SETI machines has that CPU, but I still haven't tried unlocking, yet. Still tweaking FSB for all I can get. I'm in the process of buying another one that's already unlocked, too.