The PentiumD 8xx series of chips are much harder to overclock to 266 FSB. About the best I've ever done with one of these chips would be to overclock it to 266 FSB and then it would lock up about half way during PCMark05. I don't even waiste my time anymore trying to get them to run at 266 FSB.oc4life said:I just tried it with my e510 that has a 945g chipset and a pd820 and it does not post with this mod. I tried to bump the vcore to 1.43 but still no post. any ideas
It is somewhat hit or miss. I wouldn't recommend going past 1.4625v but it you want to try 1.5v here is what you do. It is a bit more involvedBorkus said:Seems this 4GHz mod on the 630 is hit or miss. I tried another 1.388v chip, this one a batch 3601A084 Costa Rica. Best it would do is 7 mins into Memtest and thats with 1.4625v core. So I'm 1 for 3.
Also, the Dell mobo's I'm using are (as reported by CPUz):
0KF623 - success
0HJ054 - success
Any way to mod for more voltage, or is that too risky?
I think the difference between the fan noise has to do with the brand of fan that is in the system. In my experience with Dim 9100's and XPS 400's about half the time I get Delta and Nidec the other half. The Delta's seem to be the ones that speed up and down while the Nidec's are usually at the same noise level. It may not be that the fan doesn't speed up buy maybe the it does speed up but is just much quieter.Borkus said:I didn't try the 1.5v mod. I have been focused on the fact that neither of these 2 E510s will vary the fan speed. The successful mod which had the 0HJ054 mobo (I sold & can no longer test) would increase the fan under load; you could hear it throttle back and quiet down right after exiting Prime95.
There's a SpeedStep ON/OFF setting in BIOS, however it appears to have no effect; CPU idles at 14x and goes to 15x under load regardless. And I cannot get the fan to increase even with 2 instances of Prime95. Stays dead quiet. Even with an unmodded CPU. (well actually if unplug the fan power plug for a few minutes, let the CPU get real toasty, when I plug it back the fanspeed starts hi and slowly throttles down.) I can't find a motherboard sensor app that'll work so I'm in the dark as to actual temps and rpms. I can only conclude that either I've got bad mobo's or the OHJ054 mobo is somehow better (different sensor or a lower sensor setting).
Does anyone else actually own one of these E510 / 5150s or am I the only one playing?
I'm out of the loop with the laptops as of recent. I know that about a year ago you could take 400 MHz FSB PentiumD Dothan and overclock it to 533 MHz FSB (ie. 1.6GHZ @ 2.13GHz ) in a system like the Inspiron 6000. I don't believe the newer laptops give you the ability because the new Yonah's have 667 Mhz FSB but I don't believe the motherboard supports an FSB higher than this (not positive though).Decker87 said:I've been looking at laptops for college, what should I get from dell that would offer the best overclock? I really started salivating with all the talk of these huge and easy overclocks!
That motherboard was the original version that came with Dell 8400 and will not support 1066 FSB (it's 925X...not 925XE). Sorry but the compatible part# with 925XE chipset is U7077.TranquilRed said:Would this work on a dualcore 8400? The reason I'm asking is I want to try this, but CPU-Z says the chipset is 925X instead of XE, the model number is 0J3492 if that helps at all. Does that mean anything at all?
Damn it , thanks for your reply though.jmsandrsn said:That motherboard was the original version that came with Dell 8400 and will not support 1066 FSB (it's 925X...not 925XE). Sorry but the compatible part# with 925XE chipset is U7077.
If the heat is the issue, i can put a good heatsink like Zalman 9500. I think Dimension 5150 has enough case room. Dimenison 5150 has Pentium D 805, which is slight cooler than PD 820 (95w vs 130w?). I can't wait...i will do it soonjmsandrsn said:Theoretically, your PD 820 could run at 3.73GHz ( 14 x 266 ~ 3733) if you did the mod.
In practice though, I have never been able to get a PentiumD to work with the mod in one of these systems due to the extra amount of heat that a dual core chip puts out. You may be able to get the system to boot with the mod but I doubt that you'll have very good stability.
I think FSB 166 should work. if the mobo works with 133MHz, and works with 200Mhz, it should work with 166 too. See the chart below. But why did my try fail? Could it be memory? i have 533MHz DDR2 512Mb right now. It's dell mobo, so it might have fixed fsb:memory divider, but i can't change this.jmsandrsn said:I've never heard of anyone trying a pin mod for 166 FSB. I doubt that the motherboard will recognize this since it is not an "official" FSB. Just go ahead and try the mod for 200 FSB. I forget exactly which pin you need to work with but I believe it is connecting one BSEL and insulating another one. If you look back over the last several pages of this thread then I'm pretty sure that I previously provided clear instructions on how to go from 133 to 200 FSB.
You may also need to boost the voltage. I have also given some instructions for doing this. If you need more help upping the voltage then you need to post the default voltage from you processor. I have previously given a link to a program that will tell you the default.
Thanks for help, don't you think the memory frequency is the issue? i currently have stock 533MHz DDR2jmsandrsn said:There never was a P4 with 166 FSB so I don't think Dell would program the BIOS to recognize that BSEL pin combination.
You're best bet is to go to 200 FSB and see how it does or if you have no luck then try it with a P4 630 and try it.
I know PD 805 could have run 4.0 ghz as long as heat problem solved. What makes the difference between dell's pd 805 and retail's pd 805?sowingseason said:maybe it's the batch of processors dell gets that are incredibly good overclockers but yet they get sold to teh n00bz!!!!!! :O lol. i took mine out of a dell and got 3.6 on diff mobo
Yes, Tom Did increase the voltage to 1.475?...I will do it too. I will do the pin mod to increase Vcore coz i have dell mobokirbyrj said:I would be very surprised if Toms didn't need a bump in VCore to get to 4Ghz. ~3.4Ghz (prime stable) with default VCore is a good goal to shoot for. 3.5Ghz-3.6Ghz might be attainable without a VCore bump but it probably won't be prime stable.
Ok...I'd just be careful of expecting too much out of it. 4.0Ghz isn't necessarily out of reach, but I think Toms also had WC IIRC (could be wrong on that one )...but I'm pretty sure it wasn't with the stock cooler. Stock only got them to 3.6Ghz or so (once again IIRC).strongman88 said:Yes, Tom Did increase the voltage to 1.475?...I will do it too. I will do the pin mod to increase Vcore coz i have dell mobo
You are right. Tom got Zalman 9500 to hit 3.9g then went to water cooling.kirbyrj said:Ok...I'd just be careful of expecting too much out of it. 4.0Ghz isn't necessarily out of reach, but I think Toms also had WC IIRC (could be wrong on that one )...but I'm pretty sure it wasn't with the stock cooler. Stock only got them to 3.6Ghz or so (once again IIRC).
Also, their chip would do 3.6Ghz stable on stock volts. I know from experience that mine wouldn't do that. Mine only got to 3.4 stable.
Edit: Toms used some sort of Zalman HSF on theirs.
why don't you go for the same mobo used by toms, and get one cool fan like zalman. i have dell's mobo and i am trying to figure out if it's worse than yourssowingseason said:what motherboard did they use? I used a really crappy mobo and i didn't know much about computers then...i bought this shitty ass ECS board on ebay because it was bloddy cheap. like $20USD shipped lol.
edit: i also used a THERMALTAKE HSF which was a bad idea, it was one of those with a copper plate and the rest aluminum which was crappy too. i have no idea how i got to 3.6ghz with such crappy hardware...