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p4c stepping

M

M3at

Limp Gawd
Joined
Nov 18, 2003
Messages
238
what chip and stepping should I be looking for on a P4c for overclocking. I would like to hit around 3.6ghz+ speeds. I'm thinking a 3.0c, but what stepping should I be looking for?

Oh, and motherboards.
What ones have you people had the best luck with for ocing that are under 150$?
 
M3at said:
what chip and stepping should I be looking for on a P4c for overclocking. I would like to hit around 3.6ghz+ speeds. I'm thinking a 3.0c, but what stepping should I be looking for?

Oh, and motherboards.
What ones have you people had the best luck with for ocing that are under 150$?
Click to expand...

P4 3C ----SL6WU or SL6WK i think these are the ones with 30 Caps and overclocking friendly.....probably 4Ghz with some nice cooling
 
I got a 3.0 SL6WK Q401..... with 30 caps that defaults to 1.475volts and is at 3.9 with 1.585. So if you can look for this Q series malay chips that default to lower volts.
 
sl6wk 3.0c packdate 03/02/04 from pcsupply source its like 9 bucks more for a hand picked steping. i and one of my friends have the same packdate and both do 4ghz on air
 
I haven't posted on this forum before, but coincidentally just learned about this very topic.

My brother-in-law works for an engineering firm that consults to Intel (I can't disclose which -- but they do some of Intel's outsourced documentation -- so he's up on the 'inside' info).

Two items:

First, the rev to the additional decoupling caps was to compenstate for a stability problem with only certain M/B's, which have non-optimum vCore regulator circuits. Apparently some type of current limiting power starving issue. With "good" M/B's they will have absolutely no impact. Yes, I've already emailed him to see if I can get M/B specifics. That's why some will see an improvement and some won't. But this is double-edged for OCers as the additional capacitance can actually "detune" the Vcore circuit (notice those big coil inductors near the regulators) when voltage is increased for OCing. This will actually CAUSE problems as the 3LA chips will actually introduce a voltage "ripple". So - don't get too excited about the new packaging!

Next, and more interesting is that fact that Intel made... well, it's too long to explain here, but the end result is that there's one (or maybe two) runs of the 2.6c which specifically use dies from only the very center of the wafer. Most already know that the center dies are binned for M (mobile) series CPUs due to their lower voltage. In other words, you can get a chip that runs between 1.2 and 1.4 (!) volts, without getting an M processor. Now this is virtually undocumented, as Intel just had this batch packaged normally as they cancelled their original plans for them. From what he's read, it's only the SL6WS 2.6c's, and only those packaged in the Philippines, and only those with a date stamp of weeks 15 thru 40 of '03. (7315xxxx thru 7340xxxx).

Fortunately (for me anyway), I have a friend at newegg who's going to get me two (yes, I have to buy them). Apparently, they have a packaging date of Jan or Feb of '04, but I still have to confirm.

Stay tuned for results. Anyway, hope that clears up the 30 cap thing.

J.
:)
 
SL6WU - i've tried 2 SL6WK's, and neither would go over 3.6. SL6WU went to 3.75 with w/c fans at 7V! pretty sure it could hit 3.9 with fans at full blast.
 
We still haven't recommended a motherboard to this patient fellow....

I would whole heartedly recommend the Abit IC7 series, any model that you prefer.
 
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