C2D vs Prescott heat?

[Denis54]

My 3.4 Prescott P4 generates a lot of heat. How does a 6400 C2D compare heat wise?

Is there any power consumption (watts) data available for these 2 CPUs?

 

[Accord99]

From here:

http://hardtecs4u.com/reviews/...e6420_e4300/index6.php

The new E6420 looks like it uses ~60% less power at load than high-end 90nm single-core P4s.

 

[evanscnce]

I dunno, my Pentium D 820 overclocked to 3.5 idles at 18c

 

[Trevante]

Originally posted by: evanscnce
I dunno, my Pentium D 820 overclocked to 3.5 idles at 18c

Are you serious? What kind of cooling do you have? Everything I've read indicates that the Pentium D 8xx (Smithfield) are really hot and harder to cool.

What are you using to measure your temps?

Originally posted by: Denis54
My 3.4 Prescott P4 generates a lot of heat. How does a 6400 C2D compare heat wise?

Is there any power consumption (watts) data available for these 2 CPUs?

With the right kind of cooling, the 6400 should run much cooler than the Prescott. Even my Pentium D 945 runs cooler than my Pentium 4 530J ever did, and the C2D's run cooler than the Pentium D's.

 

[NickelPlate]

My 3.2 prescott used to idle right around 50C and would get into the 60s during a heavy load and that was with good cooling.

My C2D E6700 @ 3.4, by comparison idles in the high 20s to low 30s and maxes out at about 50C under full load with comparable cooling.

 

[Henny]

Originally posted by: NickelPlate
My 3.2 prescott used to idle right around 50C and would get into the 60s during a heavy load and that was with good cooling.

My C2D E6700 @ 3.4, by comparison idles in the high 20s to low 30s and maxes out at about 50C under full load with comparable cooling.

My experience with C2D vs. Prescott was almost identical to his ^^^^^.

 

[Noema]

Originally posted by: evanscnce
I dunno, my Pentium D 820 overclocked to 3.5 idles at 18c

Did you use Liquid Nitrogen?

 

[biostud]

Originally posted by: evanscnce
I dunno, my Pentium D 820 overclocked to 3.5 idles at 18c

Either you live in a very cool room, or you use some kind of special cooling...... or the idle temperature sensor is broken.

 

[BonzaiDuck]

It's not the power-consumption you need to look at primarily, although there would be a linear relationship between that number and the Thermal Design Power (TDP) -- the manufacturer's estimate of the THERMAL wattage generated by the CPU at stock speed settings under full load. [Correct or adjust me on that, but I think I'm "down center field" with it.]

You can get that info at the Intel web-site under "Support" -- from which you'd choose "Products" and/or "Desktop Processors" [this is "off the top of my head."] Look for the Technical Documents link and find the Specification Update. There will be a chapter -- and I believe it is standard practice over several generations of Intel processors to designate it with the same chapter number -- chapter 5.1 (or 5.x) -- but it is entitled "Thermal Specifications" [or something close] if I've got the chapter number wrong.

I also have a socket-478 Prescott 3.4E. By comparison, the TDP of the 3.4E is about 105W, while the TDP of the E6000-line of C2D processors is 65W. I OC my Prescott by a mild 15% with no significant voltage changes other than fixing the VCORE at 1.4V or third from the lowest of my mobo settings. My E6600 is OC'd just less than 40% at the moment (and putting through some Orthos paces so I can adjust the voltage -- currently at 1.43+V). Supposedly, an OC of an E6600 at a higher level than that pushes the actual thermal power to around 120W.

I'm only guessing, but if you OC a 3.4E to the accepted limit (without extreme cooling) of 25% above stock, the thermal power should be at least above 130W -- maybe higher.

My temps on the Prescott always stay within the range of 90F and 110F over a range of above-70F ambients. The upper boundary would translate to about 43C.

But I've implemented some low-tech cooling solutions with some success -- giving reason to go through with more refined versions of them on the C2D build currently underway. Those solutions were still based on a heat-pipe cooler and air-cooling.

 

[AmberClad]

My own temps (same case, same cooler, case cover off):

3.0 GHz Prescott 630 = 45C - 55C idle (depended on how well or how poorly I applied the thermal paste, as well as ambient temps)

2.4 GHz C2D E6600 = 23C - 32C idle (again, dependent on ambient temps)

 

[evanscnce]

Well, its in an airconditioned room (to like 75f)

As for cooling, I have a custom watercooling setup.

The tubes and rad are barely even warm when in the ac room.

When the ac is off, they are warmer and it idles at around 27c.