what is the posted limit maximum o/c speed of a Katmai PIII 550Mhz.?

[Battousai1]

what is the posted limit maximum o/c speed of a katmai Pentium III 550 Mhz.? I mean the limit maximum speed at stable working condition, not at crashing condition. with BX/ZX chipset at 100 Mhz FSB, and indicate if PC100 and PC133 thnx.

 

[bacillus]

mine was only stable up to 112fsb!

 

[Rand]

Very few Katmai's would hit much beyond 650MHz at best. The vast majority of PIII Katmai 550's wouldnt do much better then about 600MHz.
Not much overclocking headroom there.

 

[The_Lurker]

Proably highest it will reach is 120mhz FSB, (i got my 500 to 140 mhz FSB, 700mhz!!!! lol...) but the 550 katmai's had worse oc'ers than the 500's. Try www.overclockers.com for a database of oc'ed CPU's

 

[ToXiCRaGE]

The best luck i had was 634Mhz but it wasnt stable.......then it was 618, but sometimes the comp froze, so now it is at 606Mhz without any problems.......... its still almost 60Mhz more... not bad i would say (at least i dont see the 550Mhz at startup - which i got sick to look at )

 

[Mingon]

The last planned (but never released) katmai pIII was 650mhz, so allowing for 10% you should see 700 without too much problems. The main problem will be the L2 cache which runs at 1/2 speed. it was rated at around 2.8ns so 700mhz should hopefully be reachable. In my experience the majority of PIII katmai's reached around 650ish but not much higher.

 

[frantadr]

Hi,
my PIII-550 Katmai run stable W2K on Abit BE6-II at 125 MHz FSB (688 MHz core). Bootable at 128 MHz FSB, but not stable.
Memory: Mushkin 256MB-PC133 CAS2
Cooler: Alpha-PAL3125
Vcore=2.3V.

 

[Keen314]

I was able to get the following, and it was rock solid stable:
P3 500@650 (2.4V)
Alpha P3125
ASUS P3V4X
256MB of Crucial PC133 CAS 2 RAM
I also needed a 300W PS for this (I got a 350W enermax). I wasn't able to get 2.4V on my old 250W cheapy PS.