Is PIII-933 overclockable?

[Talos]

Hello everyone! I've done some search on PIII-933 and it's overclocking potentials, didn't find much, only that the higher it can go is 980Mhz at 140FSB and no more.
Has anyone of you tried to overclock that CPU and had better luck? Is it possible to unlock the multiplier somehow or is it out of the question?
What about memory?Can RAM bare this o/c?
Any help, advice or suggestion would be much appreciated!

Current System Configuration:
PIII-933Mhz
m/b: Gigabyte GA-BX2000 rev. 1.1 (BX440Chipset-Slot1)
RAM: 320MB PC133
Hercules 3D Prophet II Titanium 64MB (Geforce 2 250/400)
Seagate Baracuda IV 60GB 7200rpm
WINDOWS98

 

[Dinski]

This mobo, in combination with this Slot 1 CPU, won't allow you to go a lot faster.
Brand quality PC133MHz RAM will overclock to 166MHz, and maybe a bit higher.
I've seen a similar CPU, on Abit BX mobo, running @ 150 MHz FSB. I don't remember well, but I think it has very expensive Athlon SlotA HSF.

<font color=orange>ÃÎËßÌ ÇÀËÚÊ ËÀÏÍÈ, ÃÎËßÌÀ ÙÀÍÃÀ ÂÄÈÃÍÈ!</font color=orange>

 

[Dinski]

Maybe CRASHMAN will help you.

<font color=orange>ÃÎËßÌ ÇÀËÚÊ ËÀÏÍÈ, ÃÎËßÌÀ ÙÀÍÃÀ ÂÄÈÃÍÈ!</font color=orange>

 

[girish]

Well, the P-III 933 MHz already has a FSB of 133 MHz, and a fixed multiplier of 7. Secondly, its already near its max speed of the Coppermine core. Its the binning trick that the CPU manufacturers do to lock the speed of the processor at manufacturing time.

The limit to this Coppermine core is about 1.1 GHz or a bit more, especially since the FSB is already 133 MHz and the multiplier quite high. Each MHz you increase on FSB the core speed increases by 7 MHz.

The bottom line, you are already near the speed limit of the Coppermine core so do not expect too much of overclock with this processor. Plus, I guess you have used a slocket adapter to fit in the socket370 processor on a slot1 board, or might be a genuine slot1 processor. Either way theres a limit on the FSB due to longer connections to the processor core, especially if you have used a cheaper slotket adapter. Switching to a higher quality adapter like the Asus S-370DL or the Abit or Iwill one which has facility to adjust the core voltage to the processor might help.

IMO 980@140 MHz is pretty good oc you have got with the given setup. Try increasing the core voltage if you can which might get you 10-20 MHz up.

Hope this helps.

Boy, its good to be back!

girish

Every point I make has 'n' perspectives!
Boy do I need a <i>disclaimer</i> for my every word?

 

[camieabz]

Wow!

Girish is in the house.

He's right BTW. Don't expect too much oc'ing on it. I find that over 140MHz, my PIII Ghz just doesn't want to know. Maybe 142-3.

<b><font color=blue>~ BIOS SETTINGS: Fast, Hot, Unstable...That ought to work. ~</font color=blue></b>

 

[Crashman]

Well, early cores for the PIII Coppermine were mostly limitted to around 980MHz. Even if you had a PIII 650, you would get it to around that speed.

The latest core revision goes MUCH higher. I have a PIII 1000EB running at 1300MHz right now! See pics at ftp://141.209.46.238. But anyway...

The only way you'll know for sure is if you try. I've pushed the voltage on PIII's way up, and never burned one. If I told you how far, I might be considered a criminal (LOL) With the right voltage, you might just hit 150MHz FSB, which is 1050MHz. Noone knows if your memory will take the abuse, but you should try setting the memory timings at the longest possible settings, Cas3, 7t/9t (if available), etc.

Now, is that an SECC2 CPU? Because overclocking is a lot easier with a Socket 370 CPU and a slotket, simply because there were no good coolers made for the SECC2 package.

<font color=blue>By now you're probably wishing you had asked more questions first!</font color=blue>

 

[Talos]

Hi there, no it's not a SECC2 CPU, it's a FCPGA CPU along with a simple slotket. The problem is that my Gigabyte mobo can't go over 133Mhz FSB. i asked, because i was thinking of an FCPGA motherboard in order to o/c the CPU as well as the Graphics card (core/memory) because the 89Mhz AGP bus doesn't allow me to push it any further.

As for the memory, i was thinking of cutting properly some HeatSinks from an old Pentium133 and adjust them properly in order to get them working safely. Is that going to help a bit with the 133Mhz memory?

By the way, does the PIII-450 overclocks safely at 600Mhz with it's stock HSF?

Thank's for the advice and the ftp address, really illuminating!!!

 

[Crashman]

The PIII 450 should reach 600B speed with it's stock heatsink, at least half of them or more should. As for your motherboard, since you've already gotten to the lowest PCI ratio, I'd suggest using SoftFSB or CPUFSB to bring it up more. The BX chipset is better performing than the i815E, I know because I've owned several of both. You can get the overclocking programs at ftp://141.209.46.238

<font color=blue>By now you're probably wishing you had asked more questions first!</font color=blue>

 

[Crashman]

Hey, I have a couple BX boards here that overclock way past 133MHz. My Soyo Sy-BA6+III goes to 155MHz FSB, and my Abit BE6-II goes as high as 200MHz in 1MHz increments. If you want the BE6-II, you'll have to get a bid in <A HREF="http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2045101926&ssPageName=ADME:B:LC:US:1" target="_new">At Auction</A> withing the next three days.

<font color=blue>You're posting in a forum with class. It may be third class, but it's still class!</font color=blue>