How fast can you OC a Pentium /// 1Ghz CPU?

[matrixzen]

I wanted to know how fast I can overclock this guy with it's current config. Any opinion from anyone whos overclocked this chip before is encouraged. My setup is below.

intel Pentium /// 1Ghz (256k L2 cache) 133Mhz FSB
Asus CUV4X 133Mhz
Crucial 256MB PC100

Would the PC100 memmory affect it much?

[lbbo2002]

I have an asus dual CPU board w/pIII gig procs running at 150FSB w/PC 150 Mushkin memory cas 2,2,2.

The problem I see is you may get 10-15% overclock on your board but your memory may hold you back. Its alot to ask for pc100 memory to run at 150 and the PC133 stuff I had wouldn't do cas3 so I moved up to PC150.


good luck on your OC

[matrixzen]

Even though the book says PC133 memmory I can put PC150 modules on the board?

[batboy]

If you're running 133 FSB with PC100 RAM, then you're doing good. Yes, you can use PC150 RAM. Most high quality PC133 RAM will do 150 FSB. But, is it really worth buying new RAM just to get a little bit of overclock? Those 1 gig Coppermines are close to the max with that core. I say save up your cash for a real upgrade. You won't be able to use that RAM in your next system, the world has gone to DDR RAM.

[funnyperson1]

I agree with batboy, PC150 ram isnt worth the money right now. You would be better off upgrading your whole system then trying to get 15 extra mhz.

With PC100 youll probably end up at around 140 fsb maybe higher if its really good pc100.

[matrixzen]

It's Crucial.

[gamefoo21]

i have no name pc 133 cl3 stuff i could run at 112 cl2 and never had a error. and the stuff was only rated cl2 up to 83mhz :D. so you never know. if its cl2 pc100 then you will prolly hit 150 fsb with dropping to cl3.

Oh you could have a board like my gigabyte. its 150 fsb jumper is really 100 :(.

[Nemo]

I've got my P3 1Ghz coppermine running at a hair over 1.1Ghz (147mhz FSB). I have 2x256mb pc133 ram sticks, and an ASUS CUSL2 motherboard, stock cooling. The ram is new...before I got this, I had 192mb. One stick was PC133 and the other was pc100, so I should maybe try pushing this up a bit more now. Maybe I can hit 160 FSB for a 1.2Ghz total?

Or maybe I should wait until I can financially afford to replace it before I go screwing around looking for a performance increase I won't even notice in gaming... ;)

[batboy]

160 FSB will probably run the PCI bus too far out of spec to be stable. Generall 150 to 153 FSB is about the most you can go and still stay perfectly stable (on average... there are always a few exceptions to the rule). You'll need good cooling and good RAM and probably a voltage boost to get into the 150 FSB range.

[Nemo]

yeah...it runs fine now. Why bother with an extra 3 mhz?

[matrixzen]

Does this CPU need to be unlocked? My bios won't allow me to change the multiplier. It has the multiplier locked. Is there unyway to unlock it?

[Ralf Hutter]

Originally posted by matrixzen
Does this CPU need to be unlocked? My bios won't allow me to change the multiplier. It has the multiplier locked. Is there unyway to unlock it?

Intel multipliers are locked unless you find an Engineering Sample. All OCing will be done through the FSB. Sorry.

[matrixzen]

That sucks. Oh well

[XJ]

could it be a tualatin? he didnt specify it being a coppermine. from what i heard, the tualatin cores rocked. Forgive me if i spelt it wrong also.

[cack01]

No, its a coppermine. Plus it only has 256 cache. Under ideal conditions, 1.2-1.25 is the chips max. unless you go subzero.

Intel even had problems at 1.1 as the coppermines were not reliable at that speed for sometime. 1Ghz was pretty much "it" for the coppermines.

[Nemo]

This thread made me poke around a bit more with my P3, and I find I'm stuck right at 1.1Ghz. I go even a smidge over and I get stability issues. Maybe I could go a bit higher with something other than stock cooling, but I have a feeling I'm right at the wall. Since I run SETI@home 24/7, my CPU is under a heavy load all the time, so stability problems become apparent pretty fast.