Dothan overclocking thread

[Jack]

Nice and stable this will be my everyday setup.

Dothan 730 (1.6 Ghz) @ 2.6 Ghz, 1.55v
Corsair TWINX1024-3200C2 (2, CMX512-3200C2) 2.85v, 2-2-2-5
Asus P4P800 SE, No mods, boot @ 201, clockgen to 220

i like the 'Utility notification' comment

[Ychocky]

Looks nice What cooling?

Still on stock, I'm wondering if an Zalman 7000 Cu is even needed. (I'm a huge Zalman "fanboy" Ha! FANboy!!! get it? ) I'd like to perhaps get one mounted once the warmer ambient temperature comes (Winter) It's very cool in this basement...

I just got home from work and it has been priming for a good 10 hours. At 36 degrees celsius...

i like the 'Utility notification' comment

I love this cpu id utility.... It get's funnier every time I see it.


I am very pleased with this rig. Didn't spend to much (Just under $1000 CDN) and it outperforms my A64 3400+ (s754 mind you) (Atleast $2000)

Question: Would buying a 6600 GT or 6800 GT (The latter assuming they plummet in price with the new seven series debuting.) be worthwhile? My next computer will be PCI-E but for now AGP is king. My GeForce 4 Ti 4600 is too precious to replace though. I love that card 4x AGP and all.

[Spajky]

@ bigNewb : CM350J is a Dothan core! step.C0 IMHO should hit 200Fsb (stock adapter cooler): it has almost 15% less heat dissipation than PM at the "same" Cpu clock, 0,1Vcore less (default) than PM & "only" half L2, which are "features" that from few past years history proofed like to be a key to better OC, if your are not really unlucky to get a bad Cpu example ... [Addendum: P_M & C_M on Dothan core have almost same heat dissipation (C-M maybe max a W less) on same frequency/Fsb & Vcore & accordingly approx.25% less than the same frequency Banias core!] ...

Yes, probably won´t start @ 200Fsb @ default Vcore (since is lower than PM one), BUT :
there is always available to set the Vcore higher & if the setup doesn´t apply it right @ boot, there is always a possibility of tricking it to think, that Cpu has a higher default Vcore via "socket VID pins hole wire trick mod" or instead of using very very thin wire to do that, using a silver conductive pait to interconnect proper VID pins to set Vcore higher @ boot. With adding more Vcore than from Bios & better cooling, IMHO you could OC more than 200Fsb later to reach frequencies higher than 2,6GHz ...

That 180MHz Fsb barrier someone mentioned before, IMHO was the problem of a native PM chipset on desktop PM "native" boards, which IMHO looks alike is really not a problem with Asus base ... :-) [my wrong statement!]

IMHO for such as cheap Cpu like CM350J (90$) & half the price as PM730, it is worth a try & at your place, I´d go for that, but its your own choice naturally! Later if no joy, you can still sell the chip & buy PM7x0 instead ... just my 2c ...

Regards, http://www.spajky.vze.com

[pvhk]

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

[Mrki]

10x290 / 1:1 / 2.5-3-3-5

perhaps going more ...

http://valid.x86-secret.com/show_oc?id=25323

[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) ...

[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

[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.