P3 733 Locked??? - Tech Support Forums

custompccases · February 24th, 2003, 07:36 PM

A customer brought in a asus cu4x-e with a p3 733 wanting to oc it. Now in the bios its showing the multiplier is locked at 5.5, ive heard many times that people could oc these 733's without a prob and im wondering how I might go about unlocking this chip (if its even possible).

thekemp · February 24th, 2003, 07:41 PM

you cant unlock it, no way but you can (try) to overclock the front side bus to 133 give you 1ghz. dont forget to give it a big more juice too.

Tomteriffic · February 24th, 2003, 07:48 PM

No way to unlock it, and it's already at a 133 Mhz FSB, so th eOC potential on the front side bus is pretty limited. The 600 and 700 Mhz coppermines (100 Mhz FSB) were the real killer OC'ers.

rourkchris · February 24th, 2003, 08:14 PM

Probably not going to get much of an OC out of that chip/mobo. You'll need memory that can pull off a higher fsb and probably a better cooler. Will probably run into problems OCing your PCI and AGP cards as there is no way to lock their speed as they'll get OCed along with your CPUs fsb. Give it a shot though as you never know you might get lucky.

JayMan · February 24th, 2003, 08:39 PM

Bump the FSB up slowly.... I've currently got my P3 933 (133mhz fsb) running at 1050 (150Mhz fsb). I think it could handle alittle more but the PLL chip on the mobo doesn't have any options for higher.

Make sure ya keep it nice n cool tho, i've got a volcano6cu on mine.

JayMan

Nighthawk · February 24th, 2003, 09:30 PM

The multiplier's definitely locked. I don't think that board has any dividers for the PCI bus faster than 133MHz FSBs, so you'll be running the PCI bus above spec as well.

custompccases · February 24th, 2003, 10:21 PM

I have been playing with it today strapped on a thermaltake smart fan II with a thermaltake finned ram sink i had to do a little cutting on to make it fit around a resistor they so perfectly placed in the way onto the graphics card. On the chip I just have a athlon xp stock cooler... its workin great ive got the fsb up to 151 right now without to many probs only up to 830mhz though, its aggravating that they locked the chip.

I don’t understand one thing though I turn the core voltage up to 2v but when I check the actual core voltage in the bios it still says 1.7 sometimes it will say 2v sometimes 1.7 just depends on the boot but the mhz stays the same im confused...

What’s pci dividers? I am guessing it splits the power to the pci in some manner, any way i can find out if its turned on or does it do it automatically?

thekingofpain · February 24th, 2003, 10:34 PM

The 100 fsb chips are GREAT overclockers---take a 600 snap it to a 150fsb and instant 900---no hiccups or probs---the 133 chips just wont play like that...

Nighthawk · February 25th, 2003, 01:14 AM

PCI dividers are the thigns that make it so that the PCI bus doesn't run at the speed of the FSB.

For example, a 1/4 divider on a 133Mhz FSB would mean that the PCI bus was running at 33MHz.

custompccases · February 25th, 2003, 01:35 AM

Oh sweet I don't see that option however, to bad wish it did. Although I do see one for the Ram its got a option for 1/1 and 1/4