how well do the Pentium D's overclock?

[PremiumG]

been thinking bout getting a new system but OCability is always a factor for me.

 

[dguy6789]

I know the EE 840 can pretty easily oc to 4ghz but this may be because of the unlocked multiplier. The Pentium D series are basically the same as the EE except for HT, so I am guessing as long as your mainboard and ram can handle your settings, they should all OC pretty good.

 

[Markfw]

Originally posted by: dguy6789
I know the EE 840 can pretty easily oc to 4ghz but this may be because of the unlocked multiplier. The Pentium D series are basically the same as the EE except for HT, so I am guessing as long as your mainboard and ram can handle your settings, they should all OC pretty good.

Using what cooling ? As I understand it, they run so hot, that even with the best air-cooling available, you can hardly keep them cool.(840EE that is)

 

[Bateluer]

They are two prescott cores side by side . . . thats a lot of watts worth of heat to deal with.

 

[bjc112]

Originally posted by: dguy6789
I know the EE 840 can pretty easily oc to 4ghz but this may be because of the unlocked multiplier. The Pentium D series are basically the same as the EE except for HT, so I am guessing as long as your mainboard and ram can handle your settings, they should all OC pretty good.

4ghz is not an easily attainable goal with the 840EE.. Especially with air..

That's about the equiv. of saying the 4800+ has a EASY chance @ 3ghz and that's not true either..

 

[Technonut]

I have been seeing anywhere from 3.7GHz to around 4.0GHz. HERE is an interesting thread regarding OC'ing the 830....

EDIT: Personally, I would not fool with the Pentium D even with my VapoChill. I am waiting for a mobo designed and optimised for the X2. Then, I will make a move in that direction...

 

[dguy6789]

Originally posted by: bjc112

Originally posted by: dguy6789
I know the EE 840 can pretty easily oc to 4ghz but this may be because of the unlocked multiplier. The Pentium D series are basically the same as the EE except for HT, so I am guessing as long as your mainboard and ram can handle your settings, they should all OC pretty good.

4ghz is not an easily attainable goal with the 840EE.. Especially with air..

That's about the equiv. of saying the 4800+ has a EASY chance @ 3ghz and that's not true either..

4Ghz has seemed to be easily obtainable(but that is about the wall) with an EE840 according to the OC community who happen to have these chips.(Yes, these chips OC MUCH better than an X2) Of course this is not with stock cooling. The people achieving 4Ghz on air are using the highest of high end air cooling, such as the Thermaltake Big Typhoon and the XP90C. Tese are coupled with some pretty serious fans and AS5 to achieve those speeds.

 

[Leper Messiah]

BS. Its hard to get ONE Prescott 5XX series to 4GHz, much less two of them on air. X2's do 2.8GHz. almost 20% from the highest end part is pretty damn good, IMHO. FX-53's weren't doing 2.8Ghz on air relibliy.

 

[stevty2889]

I had to water cool my single core prescott to even get close to 4ghz, I can't imagine 2 of them sitting side by side in a single package, you would need an extreme form of cooling to keep that cool enough to make it to 4ghz.

 

[dguy6789]

According to just about everyone who has a Pentium EE 840, they overclock better than the single core chips. They generate more heat, but that is nothing some heavy duty cooling cannot handle.

Also keep in mind that it has an unlocked multiplier, which eliminates anything holding the OC back except for the processor, making it MUCH more likely that someone can OC it real far.

 

[Viditor]

Originally posted by: dguy6789
According to just about everyone who has a Pentium EE 840, they overclock better than the single core chips. They generate more heat, but that is nothing some heavy duty cooling cannot handle.

Also keep in mind that it has an unlocked multiplier, which eliminates anything holding the OC back except for the processor, making it MUCH more likely that someone can OC it real far.

Maybe some links would be helpful...I'm rather dubious myself!

 

[bunnyfubbles]

Originally posted by: dguy6789
According to just about everyone who has a Pentium EE 840, they overclock better than the single core chips. They generate more heat, but that is nothing some heavy duty cooling cannot handle.

Also keep in mind that it has an unlocked multiplier, which eliminates anything holding the OC back except for the processor, making it MUCH more likely that someone can OC it real far.

and PD EEs cost $1000+

I think the goal of this thread was to determine how well chips such as the 820s do. An acceptable price yet only 2.8GHz, you need to OC it in order to obtain acceptable let alone outstanding single thread performance.

Again this doesn't seem to make too much sense when considering that you need the best HS and large/loud fans to get it to much higher speeds on specialized air cooling. Loud and still hot, and if it takes the EE to get to 4GHz on such a setup, then perhaps the more reasonable chips won't even make it that high meaning less desirable performance at the penalty of heat and noise.

 

[rally1275]

I have a Pentium D 820 2.8@3.4 running on a Asus P5LD2.
Under a Zalman 7700 AlCu, i get 76C under seti full load at stock vcore of 1.25-1.40.
I manually set voore to 1.275 and it dropped to 72C, and have no stability issue.
I have no fooled with FSB, MCH, and ICH voltages yet so i dont know how those will help.
This is the first setup i've seen that shows stability at such a high temp, and runs stable under oc but under volt.

 

[stevty2889]

Originally posted by: rally1275
I have a Pentium D 820 2.8@3.4 running on a Asus P5LD2.
Under a Zalman 7700 AlCu, i get 76C under seti full load at stock vcore of 1.25-1.40.
I manually set voore to 1.275 and it dropped to 72C, and have no stability issue.
I have no fooled with FSB, MCH, and ICH voltages yet so i dont know how those will help.
This is the first setup i've seen that shows stability at such a high temp, and runs stable under oc but under volt.

I would run throttlewatch if I were you, once you pass 70c throttling starts kicking in, run 2 instances of prime95 and throttlewatch, and I can almost gurantee you are throttling. I hope you don't think those temps are reasonable..

 

[Lithan]

Originally posted by: rally1275
I have a Pentium D 820 2.8@3.4 running on a Asus P5LD2.
Under a Zalman 7700 AlCu, i get 76C under seti full load at stock vcore of 1.25-1.40.
I manually set voore to 1.275 and it dropped to 72C, and have no stability issue.
I have no fooled with FSB, MCH, and ICH voltages yet so i dont know how those will help.
This is the first setup i've seen that shows stability at such a high temp, and runs stable under oc but under volt.

Check your mounting and make sure fan is running full speed. That is really damn hot even for these suckers.

 

[rally1275]

Yes, I have turned my fan on full speed (3-pin directly connected to mobo), and disabled Thermal Monitor in BIOS, therefore, ThrottleWatch shows 0% throttling on either core.

Yeah I should check my cpu/hsf contact patch.

The 70C+ load temp does scare me a lot.

Question: What does Intel's thermal spec of 64C mean?

 

[DarkKnight69]

I will just wait for Yonah to own everything!!!

 

[Leper Messiah]

Originally posted by: DarkKnight69
I will just wait for Yonah to own everything!!!

Going to be waiting for a while...

 

[Bona Fide]

First of all...I doubt your board's thermal monitor is reporting accurately. ASUS always is off by ~10C and on top of that, that's HOT. HOT.

 

[stevty2889]

Originally posted by: rally1275
Yes, I have turned my fan on full speed (3-pin directly connected to mobo), and disabled Thermal Monitor in BIOS, therefore, ThrottleWatch shows 0% throttling on either core.

Yeah I should check my cpu/hsf contact patch.

The 70C+ load temp does scare me a lot.

Question: What does Intel's thermal spec of 64C mean?

It means the recomended safe maximum operating temp is 64c, and that too much above that you should start throttling. Lowering the voltage probably helped keep throttling from kicking in, since in my tests with my 3.4 it would kick in sooner when using higher voltage.

 

[MDme]

not only would you need lot's of cooling, you'd also need lot's of juice to feed 2 prescotts. I honestly doubt you can reasonably expect 4Ghz on the 840 EE (i'm not saying it's impossible, just that I wouldn't bet my house on it). Just think if intel could easily get them to 4ghz, why would they release 3.2 ghz (840 EE) as their flagship model, they could've at least released a 3.6 Ghz chip.

 

[imported_meatball]

Originally posted by: Markfw900

Originally posted by: dguy6789
I know the EE 840 can pretty easily oc to 4ghz but this may be because of the unlocked multiplier. The Pentium D series are basically the same as the EE except for HT, so I am guessing as long as your mainboard and ram can handle your settings, they should all OC pretty good.

Using what cooling ? As I understand it, they run so hot, that even with the best air-cooling available, you can hardly keep them cool.(840EE that is)

Right. They are SCORCHING hot. They're using some pretty heavy duty substrate for that package to not just disentigrate.

 

[stevty2889]

Originally posted by: DarkKnight69
I will just wait for Yonah to own everything!!!

Yonah should have some enhancements that help it out, but it's still not gonna be a major competitor against desktop chips. You'll have to wait for the desktop version of Merom for any real changes(Conroe), since it's a differant architecture, which of course also means we have no clue as to how it will perform.