Overclocking PII 400?

[BChico]

I have dual PII 400 on a Tyan Tiger 100 mobo. My question is, how much can i get out of these processors? They have passive cooling, only heatsinks. What are the safe temperature zones on these processors?

Thanks,

 

[BChico]

^^^

 

[skypilot]

If I were you I would attempt to stay under 55 C with these procs to operate safely. Invest in some Fans for those heatsinks. On the overclocking front, most people with little or no voltage increase were able to O/C these multiplier locked CPU's to 448 (112x4) easily. That was the most common overclock. I would be suprised if you would hit 496 (124x4) without a huge voltage increase and tons of cooling. Hope I could help.

 

[BChico]

Thanks, ill try it out.

 

[Rafael]

I had one b4, and I hit 4x124 Mhz @ default Voltage easy! But my mobo was a Asus P2-99. Dont know about the Tyan.
Retail HSF, and put to run at 4x133 Mhz too, just didnt leave running cos I couldnt read temperatures on my mobo, I needed the thermal cable P2T to read temp from the processors.
So I stayed at 4 x 124 Mhz.

[Edit] Sorry I didnt read that you were using DUAL processors. Yeah, you might need to increase the voltage. But I think wont be all that hard to OC, just dont jump to 133 Mhz, go slowly!

Good luck!

Raf

 

[jiffylube1024]

Try to get some fans for the CPUs tho, active is much better than passive cooling. Especially with overclocking, a fan on each CPU will make sure the CPU's are safer.

 

[BChico]

Never really worked with slot 1 processors, what are good fan or hsf combos?

-Brad

 

[skypilot]

Alpha P3125 i think is the model #? Anyways I'm not really sure but I know alpha made one.....

 

[Nucro]

I had my PII@560 on my Abit BE6. Yeah 140 fsb on my bx I only added another fan on the stock hs and applied thermal grease. It was totally stable @2.1V and I think I could do 600 if I had a better ram

 

[Vic]

Most PII's don't go much above 550.
Your best bet is to shoot for 533MHz or 133*4 and you may have to increase the voltage slightly in order to be fully stable. Heat should not be an issue as long as you use any newer decent but cheap and small aluminum HSF, say like one designed for a ~1G Athlon.

 

[BChico]

Im hoping for 500 on each of em, to give me 1000 total.

 

[Colt45]

<< Most PII's don't go much above 550.
Your best bet is to shoot for 533MHz or 133*4 and you may have to increase the voltage slightly in order to be fully stable. Heat should not be an issue as long as you use any newer decent but cheap and small aluminum HSF, say like one designed for a ~1G Athlon. >>



SECC 2 and Slot A used a different method of attatching HSF's!

if you need a better HSF, you need one designed for SECC 2 (PII 350+, all Slot 1 PIII's)

good luck with the OC

 

[BChico]

Got a problem, i dont think i can get the hs off of this one processor. It looks like its bolted in or something? Any ideas?

 

[Colt45]

this should help

another one

if you need any more info, do a google on "remove PIII"

edit: it appears some steppings of PII400 are SECC 1, and some are SECC2.

you can tell the difference if the cpu has a heatplate below the HSF or not.
If it is a SECC 1 you can remove the HSF by lifting two clips, and put on a Slot A athlon heatsink.

 

[BChico]

Other problem is how to overclock on a tyan tiger 100. Can you change the voltage?

Thanks Again!

 

[Colt45]

i dont remember exactly, but by covering certain pins on the PCB of the CPU, (the contacts where the chip slide into the slot) you can achieve different voltages.

there are different methods of covering them, like tape, or paint (nail polish)

ill do a search on it, and see if i can find out what pins do what voltage

heres some voltage info

try checking google, and the intel whitepapers for more info on this

 

[BChico]

Thanks.