Prescott Problem

[Carlson]

Yeah, I'm usin a 2.4A Prescott (533FSB or 133) and I keep seeing people with it at 3.6 ghz, 800 FSB or 200, at stock voltage and cooling.

I'm running mine at 3.24 Ghz, or 178 FSB, at 1.5 volts and its still not prime 95 stable, nor can i get it above 180 FSB

I'm using a P4C800-Deluxe Asus board, 3200 speed corsair XMS low latency ram, and a zalman 7000 alcu HSF. Which is the problem? the ram is capable of attaining 225 we tested that.

[handrail]

what forum(s) did you see those overclocking stats at? sounds a little whacky to me with all stock settings. surely they would need to up voltages somewhere or get better cooling at the very least. were they adjusting the multipliers at all? is it overheating at all when you run prime95?

then again, i'm an AMD user...but still...the basic ideas are the same.

interesting. :?

[Nick]

Not everyone will be able to get their 2.4 up to 3.6 in the same manner. You might need to raise voltages, use a water cooler, or maybe your processor simply can't handle it.

Here is a link to the HardOCP overclock where they attained 3,690mhz using the 2.4A/533:
http://www.hardocp.com/article.html?art=NjAzLDM=

They were using a water cooling setup and had voltage set at 1.625. I bring it up as an example, in the end it all comes down to your cpu.

[kb244]

Besides the Prescotts ( thats the newer one right ) , are known to be boiling hot even at their typical stock speed, so overclocking them would seem almost suicidal to me unless there was some extreme cooling, then again the northwoods are much cooler, but not very overclockiable.

[Nick]

Northwood is built on a 130nm process, this has theoretical bandwidth limits and also requires higher voltages to run at high clock speeds. Built on 90nm, the Prescotts run at lower stock voltages which is where a lot of the overclock capacity comes from. As far as temperature is concerned, yes the Prescotts are hot, but i've found it to be somewhat exaggerated. The Engineers knew it would be hot and put features in place to deal with it and even at high speeds, the stock Intel cooler deals adequately. The Zalman 7000 AlCu are pretty nice coolers and should perform pretty well also. I honestly believe that its simply manufacturing variability that is the limiting factor here.

[Carlson]

Thank you for everyone's attempt to answer the question.

Standard voltage is 1.3875, mine is nearly maxed out at 1.5, So that's right out. I'm betting I just have a defunct processor.

[handrail]

yes, rich and i both have nearly identical set ups with barton 2500s and A7N8X boards, but his will O/C a little better than mine. just little discrepancies here and there i guess.