What motherboard are you using? and are you sure it's supposed to be compatible with your CPU?

The two possible issues that pop into my mind are either CPU incompatibility or overheating, also, 1.475V might be worth trying since some Tualatin CPUs run at that voltage specification.

ASUS TUV4X yea it's supported

Also tried 1.45, 1.5 and 1.55 no luck

Have you tried another processor? Sounds like bad caps to me.

Bad caps or a flaky power supply is my guess.

I'll try a new psu, recapping will have to wait

candle_86 wrote:

I'll try a new psu, recapping will have to wait

i don't know if P3 is hogging the +5v(that new psu's are weak) rail but my experience with athlon xp's with modern atx's psu was terrible.

Board or psu is the issue as getting a dud of a cpu is pretty unlikely but certainly possible.

Well tomorrow I'll test with a new psu

tested psu, no go, still stuck above 100mhz FSB with the Tully, the coppermine is fine at 133. I found however a D815EEA2 for 20 bucks with free shipping, that they tested with a 1400-S, I jumped on that, it has the 815EP chipset anyway so better drivers and speed vs my Apollo PRo 133T, and the 512mb ram limit means nothing when i'm using Windows 98 on it

If i would generalize (and obviously I will).

Sudden freeze during POST with a supported CPU (or a non supported CPU that is working when running at a lower FSB): Motherboard issues.
Sudden resets during POST: CPU or memory. Sometimes PSU too weak or failing PSU/motherboard caps.
Lots of exiting artifacts during post with a known to be working (in that motherboard) video card, than freeze: CPU or memory.
Sudden freeze when the (non DOS) OS starts loading: Motherboard issues.
Sudden reset when the (non DOS) OS starts loading: Failing motherboard/PSU caps or instability because of overclocking something.
No POST in the first try but working after beeing reset: Failing motherboard/PSU caps.
Blue screens in Windows 9x not related to your new PnP scanner: Mostly memory issues.
Sudden freeze in Win9x then the system is working in slowmotion just to freeze up totally after a minute: CPU not stable, because of non stable overclock or because of failing motherboard/PSU caps.
Sudden reset in Win9x: Pretty much always too little V-core, could be because overclocking too high or motherboard/PSU caps. I find the freeze --> slowmotion --> freeze more common in Win9x.
No POST (with a correctly configured system): Could be anything but the first thing I try is another PSU.

The above is of course not always true but how I think when it comes to what I going to try first when I try to solve the problem.

If your CPU is faulty it can pretty much only be because of marginal internal L1 or L2 cache working at 1050 MHz but not 1400 MHz. I find this kind of unlikely and it should most often result in repeated resets during POST if POSTing at all, not a freeze during POST in my experience.

Your original motherboard probably had marginal capacitors. The first QDI Advance 12T I used back in 2002-2007 actually developed the same issue during its last six months of service. I ran a PIII-S @ 1575MHz for years in that thing. Then it started having trouble POSTing with the PIII-S, even at 1400MHz. I had to downlock it to 1050 to get it to work properly. Strangely, that board worked just fine with a PIII-1200 (Tualatin-256), even when overclocked to 1.35GHz. ESRs were way out of spec, but at the time I was not confident in my ability to replace capacitors.

Fast forward to 2015. I finally find another QDI Advance 12T, which I gladly overpay for. My "new" Advance 12T is running that same old PIII-S chip from 2002 at a rock solid 1575MHz. Hopefully for years to come.

The obvious point of my anecdote: if you're interested in reviving that board or selling it, check the caps. That's likely where you'll find the problem. The TUV4X should work just fine with a PIII-S; I still have one and it runs that CPU stable at up to FSB-152 (1596MHz).

Well I have a co worker who wants the TUV4X board, it was always a little flaky, random lock ups, random USB failures. I tested my PSU i was using, its a Dell P4 250W with 24A on the 5v which should be fine and according to the meter its still within spec, plus they did overbuild those things.

I did remove everything not needed to test as well. Final config to see if its a power issue

PIII-S 1400 @ 1400 L2 and L1 disabled
1x64mb PC133 stick
ATI Rage IIC AGP
3.5 Floppy drive with a Windows 98 Bootdisk

Still locks up booting that boot disk.

But I'll be happy with the intel board, the VIA chipset gave issues with AGP anyway, had to find a very specific 4in1 with a GART regedit to get my FX5900 to work

do on the D815EEA2 it doesn't post at all with the Pentium III 1.4, bios tested P13, P15 and P21 no post. Posts fine with Pentium III 800

candle_86 wrote:

do on the D815EEA2 it doesn't post at all with the Pentium III 1.4, bios tested P13, P15 and P21 no post. Posts fine with Pentium III 800

Well then I will have to guess that the CPU might not be able to do 1.4 GHz any more.

I still find it very strange but it isn't unheard of that CPUs lose stability at frequencies they were once stable at if driven hard and running hot for extended periods of time. It's really rare that an Intel CPU loses stability at the stock frequency as Intel always had good marginals but perhaps this CPU was working in aweful conditions for 10- 15 years...

I have a VERY abused P4 3066 that suffers from this, in most motherboards it will reset as soon as it starts to load an OS. In a few other motherboards it still runs fine at stock speed but wont overclock much at all. Before beeing tortured the CPU did 3.6+ GHz bench stable.

At least you have a nice motherboard for the next Tualatin 1.4 you happen to find. Perhaps you can get some money back for the half dead CPU, now you have at least tried everything.

One last try grabbed a Tully 1.26 from fleabay for 5.99 free shipping I'll test that, if it works the seller of the 1.4 will replace the 1.4 and I'll have a spare 1.26 512k chip

candle_86 wrote:

do on the D815EEA2 it doesn't post at all with the Pentium III 1.4, bios tested P13, P15 and P21 no post. Posts fine with Pentium III 800

The intel boards that are D815EEA2 U are compatible with the 1400 Tualatin. U equals UNIVERSAL.

No U printed on the board, but seller stated its compatible, and intel doesn't say there are 2 versions of this board on their site. So the board better work with a Tully or both the seller and intel are gonna get an earful, neither are clear.

But looking there is no U listed, and I just went onto ebay to inform the seller I will not pay their 20% restocking fee and they will take the motherboard back, at least its ebay and I have seller protection meaning they can't actually charge me a 20% restocking fee if I dont want one.

Ironic as well, Intel on the bios page for this board lists out adds support for 1.2 celeron, add support for 1.4 celeron.

The D815EEA2 is an existing board and should have Tualatin support. I can't guarantee if it supports all of them, Intel had a habit of locking out some of their own CPUs to force their customers to upgrade earlier, even though the CPUs will work correctly with the boards after having messed with the BIOS (like using an older BIOS file).

I've used 2 D815EEA (without the "2") and these only supported Coppermines.