Dothan overclocking thread

[NoX]

Amazing Charlie!

But wasn't TCCD+875 supposed to be a crappy combo?

[bcn]

xtreme!!!

i must isolate my sockel better. than countinue testing.

/edit
one question
why his sandra score so much better?

well if you notice, he has memory at 295MHz and yours is only 245

[Mrki]

well if you notice, he has memory at 295MHz and yours is only 245

its not mine and its an other problem.

he have wirh 1:1 and 295MHz only 6600mb/s. and the other guy have with 245mhz(real) 6300mb/s

u know what i mean?

[Mrki]

by the way my new result

[CM50K]

HOLY SH*T

[bcn]

its not mine and its an other problem.

he have wirh 1:1 and 295MHz only 6600mb/s. and the other guy have with 245mhz(real) 6300mb/s

u know what i mean?

actually I do NOT... one has 1:1, the other 5:4, then again it depends on timings... i do not see anything strange in that difference....

[bcn]

by the way my new result

By the way, how the hell did you up the voltage that much??!! what cooling are you using?

[Mrki]

actually I do NOT... one has 1:1, the other 5:4, then again it depends on timings... i do not see anything strange in that difference....

hehe ok

perhaps i look wrong.

vcore and vdrop mod. using vapo ls. eva temp -50 cpu -25.

now i test 32m with 1.8vcore hehe

[bcn]

well, at the moment you are here with highest FSB on P4C dlx incredible, man!

[charlie]

well obviously 295, 1:1 beats 245mHz with tight timings... but 260 tight should beat tccd in all cases...

C

[bigNewb]

Have bought nothing yet, trying to put together a nice system that has a little bit of futureproofing... figure if any nice HDTV cards come along, they are likely PCIx? which leaves me with the P4GD1... not available in US. so... if booting a 350j at 200MHZ FSB is not likely, certainly don't want to go that route, and would go PM730 instead (but would probably get a different MB with it). anyone played around with a CM 350J (C0 stepping, 100 FSB) yet? old tests i read showed little difference between 512k L2 CMs and 1MB Banias... hoping the same is true of the dothan core CMs if they can boot at 200FSB... looks like a great solution for an $85 cpu if it is doable.

[charlie]

Malves Corner


@ Charlie, did you have to do any mods to reach 295Mhz?
Cause that's a mighty fine mem speed you got there

The only mod is the NB cooler... I've found that all my tccd, mushkin, g.skill... all run well on it Oh I run 1.70Vagp.

C

[Frozendeath]

Have bought nothing yet, trying to put together a nice system that has a little bit of futureproofing... figure if any nice HDTV cards come along, they are likely PCIx? which leaves me with the P4GD1... not available in US. so... if booting a 350j at 200MHZ FSB is not likely, certainly don't want to go that route, and would go PM730 instead (but would probably get a different MB with it). anyone played around with a CM 350J (C0 stepping, 100 FSB) yet? old tests i read showed little difference between 512k L2 CMs and 1MB Banias... hoping the same is true of the dothan core CMs if they can boot at 200FSB... looks like a great solution for an $85 cpu if it is doable.

The 100 fsb CM's have overall had trouble getting to 200fsb. Much like the older 100fsb dothans, they hit a magic wall at 180+ fsb. Now from what I understand, the dothans have multipier adjustment via the right bios (due to intel "speedstep") however the Celeron M's do not support this feature. The point being that since the CM is stuck at the default multiplier it makes it hard to boot at 200fsb, especially with stock cooling. Now for $85 it is a fine CPU, but it simply wont put up numbers like a Dothan will. The 730 is a monster for its price, with the possiblity of 2.7+ ghz on stock air. Adjust the multi down, and with some nice ram you can really pull that pi time low and other benches / games high

If all depends on how future proof you want to go. SLI and DDR2 are not options for a Dothan rig at this time. Look for some dual core dothan goodness in yohan coming from intel in '06, which you may want to hold out for (I know its a while away).

BUT if you want the possibility to match and fx-55 clock to clock performance wise, and in some cases surpass that. Than a 730 - 760 Dothan is the way to go. Future proof enough that it can take top spots on the ORB. Dothan itself just needs some great hardware to go with it. Get some nice ram like gskill TCCD or some UTT (like muskin redline) a solid platfrom such as the p4c800e-dlx, and a high end agp video card.....

Future proof enough for a while

All comes down to: how much money you want to put in, what you consider future proof, and how badly you want the latest and greatest (SLI/Crossfire, ddr2, etc)

Hope that helps

[bigNewb]

The 100 fsb CM's have overall had trouble getting to 200fsb. Much like the older 100fsb dothans, they hit a magic wall at 180+ fsb.

even the C0 stepping CMs? I've searched quite a bit, and can't find anyone that has attempted OCing the 350j (C0 stepping with 13 multiplier, thus 2.6 at 200 boot... if they are rated based on market rather than perf, why not?) with the CT-479. Aren't the CMs simply PMs with half the cache and the speedstep deactivated during validation??? does the performance of chips from a given fab vary that much? as my name says... newb. in fact, not even sure i'm spelling newb right. noob?

[Frozendeath]

I can't comment on the C0 stepping, but all of the CM's I have seen (not sure what stepping each was) would not reach 200 fsb. Other members here with hands on experience may be able to answer that better.

Best info I could find: Here

And I think your right, CM's basically lack the cache and speedstep compared to their dothan brothers.

[bigNewb]

I can't comment on the C0 stepping, but all of the CM's I have seen (not sure what stepping each was) would not reach 200 fsb. Other members here with hands on experience may be able to answer that better.

And I think your right, CM's basically lack the cache and speedstep compared to their dothan brothers.

yeah... how does the cpu define the default fsb speed anyway... if the CM dothan goes as the CM banias, they should be from the same production shouldn't they?

then again, maybe they aren't???

here is a comparison of the banias core CM and PM...
http://www.tomshardware.com/mobile/2...ntrino-01.html

banias they had the same FSB speed (100MHz)... here they don't? maybe they are not simply C0 dothan's with half the cache disabled now, but a new beast entirely?

[pazza316]

Any one going to produce an overclockers board for the Dothan CPU? If so when? Thread? etc!!!!!!

[Ychocky]

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

[DaWaN]

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

Looks nice What cooling?

[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

[NoX]

I was able to get 265Mhz 1:1 but if I use the 5:4 divider the mobo craps out as soon as I pass 270Mhz. How did you guys reach 290+Mhz FSB?

[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