Dothan overclocking thread

[bigNewb]

no! the fsb limitation for dothan 400 is not due to the mobo chipset (i855): i have 2 dothan 725 which cannot overcome 160fsb whatever cpu ratio used ( and this on i875p chipset)! On the contrary my new pm 730 reach easily 200fsb (200x12) with a little bump on the vcore (1.3625) and at the very moment runs at 209x12 (vcore=1.4125) on my p4p800se

which begs the question, what limits the 400 MHz chips to ~180 FSB? is it the default FSB (still don't know how this gets set on the chip side), or is it the stepping? if it is the former, the newer CMs will still have problems... if the latter, should be fine (maybe even better?). still have not seen ANYONE that has tried the necessary mods to attempt a boot at 200 FSB... everyone seems to be booting lower and trying to step it up. If the issue is PCI/AGP lock, and that is no longer an issue at 200FSB, then the only question is... will the 350J boot at 200fsb (not will it get there, starting at 133 or whatever and inching up) with the appropriate jumpers, mods, etc.

[Spajky]

@ pvhk
: IMHO you should do the math once again! No wonder you could not go higher with practically default Vcore with both your PM725 ones (1,6G). With 160Fsb you achieved (2,56G) is a quite normal result with default cooling, since mostly w/o bumpin´ up Vcore Dothans go around 2,5GHz so ... Your 725 Dothans/100Fsb (27W) going to 200Fsb (3,2G!-100% OC) would need max.Vcore & at least waterCooling & maybe a Peltier element too! You other one (730/133fsb-but same basic 1,6GHz frequency) is just 50% OC-ed to 200Fsb/2,4G.

The story with low (13x) multiplier & 100Fsb CM350J having a default 1,26Vcore (and max.full load 21W heat dissipation is IMHO totally different & IMO could with 10% up bumped Vcore /to 1,38V/ hit w/o problem 200Fsb/2,6GHz with stock cooler ... and would be faster than your 725/160GFsb@2,56G because of higher Fsb ... Compare Mrki´s result!

@ Mrki : wow, good achievement! What kind of cooling & Vcore?

Regards from Spajky, the member of "Silent AirCooled Computer Owners Team" (with inaudible setup, Tualatin on BX) ...

[bcn]

well, I am sure he has changed a multi, cause I could not get higher than 150FSB, with 725, whatever multi set on it and whatever voltage!..

[NoX]

In Aquamark my little Dotthy at 2.85G and with stock HSF, scores higher than a 3.6G FX57 with subzero cooling.

[uclajd]

In Aquamark my little Dotthy at 2.85G and with stock HSF, scores higher than a 3.6G FX57 with subzero cooling.

So why not scores with Dothan + 7800?

[bcn]

In Aquamark my little Dotthy at 2.85G and with stock HSF, scores higher than a 3.6G FX57 with subzero cooling.

nise chip you have there! where is it from and what date?

[pvhk]

Spaskjy:no need to do math I said that my 2 725 fsb limit is 160 whatever ratio used and rising vcore did not change anything and both max at 2.4Ghz (15x160 ok, don't work at 16x160))

[NoX]

So why not scores with Dothan + 7800?

Eventually they will come. If you search the ARC there are already some impressive scores with Dothans at 3+ Ghz. Kingpin with an X850XT is just 7000 points away from the WR (FX57 + 7800s)

nise chip you have there! where is it from and what date?

I got this 730 chip from ewiz.com a couple of months ago. I don't have the box with me to check, but if I remember correct it was dated 11/04.

[Mrki]

@ Mrki : wow, good achievement! What kind of cooling & Vcore?

Regards from Spajky, the member of "Silent AirCooled Computer Owners Team" (with inaudible setup, Tualatin on BX) ...

vapo ls ...

thats max

10x300 1:1 2.5-3-3-5 OCZ TCCD cooled by vapo ls

http://valid.x86-secret.com/show_oc?id=25326

[NoX]

wow! Is that a P4C800? What vmod are u using? NB cooling?

[Mrki]

wow! Is that a P4C800? What vmod are u using? NB cooling?

jep. P4C800-E Deluxe

NB cooling stock. only a good 120 fan

have vcore, vdrop and vdimm mod

greetz mrki

[bcn]

Nice!

[Peteri]

Got my very own Dothan rig up and running today (well, actually yesterday since it's over midnight here right now..). P4C800-E Deluxe + CT-479 & Pentium M 730 (SL86G, Malay, 04/14/2005)

My PM 730 does 2600MHz with stock cooling and about the max Vcore the 1023 BIOS lets me to use. Best 1M is done a bit under that though because my TCCD's don't like much over 210MHz at 2-2-2-5.

Will switch to better (air) cooling during the weekend and try to get out some marks too (with a Leadtek 6600GT). Thanks to all who have contributed to this thread. Has helped a lot in discovering the power of Dothan and getting going with it.

[^don.k's^]

Maybe using an old PCI video card would do looser time in superpi?Max i can achieve is 27,78secs @2,7ghz aprox and 2-2-2-4(13x multi and 1:1 mem) in a P4GD1...

[Peteri]

Maybe using an old PCI video card would do looser time in superpi?Max i can achieve is 27,78secs @2,7ghz aprox and 2-2-2-4(13x multi and 1:1 mem) in a P4GD1...

Hmm, could it be so? Have got one old ATI PCI card in the closet. Maybe should try it out.
Got my 27.937s @ 2.567GHz. Must be the advantage P4C800-E gives over P4GD1.

[Sume4]

Goes maybe a little offtopic but how have you attached your coolers to dothan + CT-479 systems?... I looked through the cooling sections but there was nothing there. Id need to attach a water block on it.

[Peteri]

Goes maybe a little offtopic but how have you attached your coolers to dothan + CT-479 systems?... I looked through the cooling sections but there was nothing there. Id need to attach a water block on it.

"CT-479 mounting tricks?"

Siinä on jotain aiheesta.

[caater]

just an idea - how 'bout submitting all results to oc database?
overclockers http://www.cpudatabase.com/ seems to be quite an ok solution (or will xs include similar thing here too?)

[dqniel]

what boards other than the p4p800 se and p4c800-e deluxe are worth getting? also, how much do they cost new and where can you get them? i see the p4p800 se and p4c800-e deluxe everywhere but i can't find the other p4c series boards ANYWHERE...not even used. so far i seem to find

p4p800 se - around 95 new
p4c800-e deluxe - around 180 new

is the p4c worth the doubled price, or is it worth buying a p4p or tracking down a p4c800 non-dlx version? links and suggestions would be great, i'm looking for a decent overclock but i'm not gonna pay 180 for an old motherboard unless the performance of the other choices is terrible.

[Peteri]

My max 1M



Can't figure out why I seem not to be able to boot for example at 10x240 or 9x240 (1:1 or 5:4) no matter what timings and voltage (seems so). Booting with 10x201 or 9x201 works fine though and with ClockGen I can use 10x250 1:1 (2-3-3-5) or 5:4 (2-2-2-5) easily. Maybe some new non-beta BIOS will bring the solution. I'm using 2x512MB TCCD.

[Kjaks]

do you burn-in these p-m's, and if; did you gain speed or/and a lower vcore?

[Jericho]

M740 Watercooled
2Gb Ballistix kit
P4C800-ed (BIOS 1023 beta1)
X800pro modded XT PE

This is on XP sp1 with no tweaks

1.45v set in BIOS, droops to 1.39/1.4v under load , might do a droop mod.

and 33K 2001 default card - no tweaks again

http://service.futuremark.com/compare?2k1=8636017

Heading on up

[Gautam]

Hows 36k at barely over 2.6GHz sound?

[Jericho]

Hows 36k at barely over 2.6GHz sound?

HIS Excalibur X800XT PE @ 635/630 vGPU= 1.63v, Alpha PAL6035 provided by OC-Rookie + delta60mm. AGP @ 79MHz. 100% air.

Nice clocks on the GFX.

But I guess your tweaked right out there & running Win2000 with dx8.1

Is that the fastest config even with an Intel/ATI based setup ???

[Gautam]

Yep, much to my surprise it is. The gain isn't the same as it is with AMD, but Win2K is the OS to use, definitely with Dothans, seemingly even with P4's.

Dang, those 2 gigs are flying.