Tualatin 1.2@1.44 Stuck

[zoopa_man]

Well... Got my Celeron 1.2 Tualatin all the way to 1440mhz with out a problem. Still at default voltage and 3.3.1 for divisors. 120mhz FSB speed

I tried for 125 FSB and hit the wall...

Nothing i've done has gotten me to even POST at 125 FSB. I uped the voltage to as high as I can go 1.6v and changed the divisors to 4.4.1 And tried all combinations inbetween. Still no POST :confused:

I havn't done the vid pin mod yet, I wanted to see how far I could go with out it. But right now I would have thought that increasing the voltage to 1.6v to get to 125 FSB would have gotten me to POST. but nothing. This has got me worried so I threw up this thread looking for feedback. This is my first serious overclock so I need some help and encouragement.

Here is some info from the 120 FSB 1440 mhz 3.3.1 divisor and ram is at slowest setings

CPU temp according to MBM is 32C with water cooling
I can run Sisoft Sandra burn in with no errors
Windows seems to be stable as a rock. No memory errors or goofy quirks.

So what do I need to make this go higher? I hit a wall and need help please. Thanks :)

[Bonka]

Do the voltage mod. Even with a bad chip, it should still get 1.5 or close to that. Actually, I've yet to see a 1.2 do lower than 1.4. Do it and see what happens. I doubt RAM would be a problem. You should think about running your dividers at 1/4.

[Pecos]

My Celly-T 1.2GHz OEM started out the same as yours. It would run stable at 120MHz FSB at default voltage. I let it burn in for a day and a half at that with combos of Prime95, F@H and Sandra burn-in. Bumped it to 1.6V and 133MHz FSB and it wouldn't boot so I wire wrapped vid1 and vid2 and started easing it up.

The thing will boot and load WinXP at 1.6GHz with the vcore maxxed at 1.80V, but during Prime95, the system will reboot itself (CRAP!). Knocked it down to 132 MHz FSB and it's a bit better -- no reboots -- but it errors in Prime95. I know that it's not a system prob since I had my P3-550E in this system at 133+MHz FSB -- this is CPU related.

At 131MHz FSB @ 1.80V it seems rock solid... I've got it burning at 130MHz FSB @ 1.775V for the rest of the evening.

2 damn MHz shy so far!

If the weather gets back to normal temps around here, I've got a Black Box ServSwitch KVM Extender that allows me to run a monitor, keyboard and mouse up to 1000 feet away from the PC box. I'm thinking of putting the PC in the garage (where it SHOULD be nice and cold) and run the damn thing from the comfort of my basement to hopefully determine if I'm hitting a heat barrier (doubt it since I only get to 42C during Prime95 with the SK-6) or just the speed limit of the chip. I'm thinking I'd be stable at 1.6GHz if I could get to 1.85V.

Oh well, I bought that chip for a toy anyhow...

[Rooski]

I agree with the other guys. You need to vid pin mod it.

[6502kid]

I musta got lucky. I have had my 1.1a running at 137fsb
for 2 days now. No vid pin mod needed.

I'm not sure if the minor restart problem I get is worth doing
it.

XET-C is my board for the 1.1a

[zoopa_man]

Ohhh yah baby. I got it.

Right now here's wher I'm at.

130Mhz FSB
1560mhz
4.4.1 divisor
1.75v

Right now idle in windows i'm running at 37C I'd like to see that even cooler...I hate being close to hot...I may consider going pelt...depends on how big of one i'll need. I can't figure out the wattage i'm putint out. Radiate II dosn't have the Tualatins in it's database yet. I don't know how to do it the paper and pencil way....If any one knows off the top of their head let me know what size pelt i'd need.

Got to do some stability testing tonight and after classes tomorrow....Thanks for all your help...it's been an adventure.

[Yodums]

Wow tacked on 100+ mhz good job.

Probably need 120watt peltier I assume or something.

[Pecos]

Wow, that is good although that is kinda warm with water cooling. My Celly-T 1.2GHz is at 1572MHz (12x131MHz) @ 1.80V at the moment. I've had Prime95 and F@H cranking for the last 45 mins after slicing the IHS off and the load temp is flipping between 38 and 39°C with a mobo temp of 28°C with case open load temps of 40~41°C and mobo temp of 30~31°C with case closed. (I need better case fans -- I'm using 2 80mm left overs! ;))

Still cannot get 1.6GHz (or 1.588GHz (12x132MHz FSB) for that matter) stable. System reboots under CPU load. I wish I could get another .5V outta this mobo as I think that would do it.

Hope the pelt works for ya! I had to tweak the SK-6 clip a little to create more pressure against the nekkid core to lower temps more. A trick some of you might make note of. It kinda makes the HS sit a little better on the core so it's not so sloppy...

[Pinky]

For a tualatin at that voltage your temps are fine, mine will go as high as 41C under full load and be 100% stable.. the problem is, once it reaches the 42-43C level, it usually just locks or reboots :D