P4 2.8c D1 stepping with 30 caps?

[TheJQ]

Hi,

I just bought this boxed 2.8c D1 stepping (SL6WT, pack date 05/05/04) from Frys in San Diego. I was surprised to see 30 caps on the back side. My previous 2.8c D1 has only about 15. After installing, it easily hit 3.422 GHz (246x14) on normal vCore (1.525v). I have run Prime95 for about 10 mins with no problem. I tried 3.5 Ghz also at 1.525v, but failed Prime95 after 2 mins. I think this chip has alot of OC potential which I'll find out soon enough. For now I will just run it at 3.4 Ghz to break it in.

Any thoughts?

James

 

[MichaelZ]

nice

 

[Sylvanas]

wow i should get me one of them :thumbsup:

 

[Thor86]

30 cap D1 2.8? That's new. I only thought the M0 steps were 30 caps.

 

[jhurst]

That is odd. I had a SL6WJ D1 with the ~15 or so. It would do a max of 243FSB (3.44ghz) on stock voltage. It would do 250FSB (3.5ghz) but voltage had to be raised to around 1.7. I recently switched that out to an M0, now I can run at 257FSB (3.6ghz) at 1.6v. It has been a nice upgrade.

 

[MichaelZ]

Originally posted by: jhurst
That is odd. I had a SL6WJ D1 with the ~15 or so. It would do a max of 243FSB (3.44ghz) on stock voltage. It would do 250FSB (3.5ghz) but voltage had to be raised to around 1.7.

Yeh but this is a CPU with a pack date of 05/05/04. For something this new to OC, that's pretty impressive. The newer the P4 the less it will OC.

I recently switched that out to an M0, now I can run at 257FSB (3.6ghz) at 1.6v. It has been a nice upgrade.

Is that all? I would have expected a bit more. My friend's D1 2.8C purchased june last year @ a ridiculous price can do 257FSB (3.6ghz) @ 1.55V, I guess there's the advantage of buying a P4 early. Actually, at 1.6V it can hit 3.8Ghz but that crashes after you open any applications He's planning on keeping it for at least another 1.5 years so no more Vcore for that thing.

 

[TheJQ]

Before this, I've only heard of 3Ghz D1s with 30 caps. So it makes me feel that this batch of 2.8c D1s are actually 3.0c parts that somehow got marked down (market demands?) which has happened to Intel CPUs in the past. My friend's 2.8c which has a pack date of 4/10/04 has only 10+ caps and can barely do 3.4Ghz only at 1.68v vCore.

Since it's a brand new CPU, should I let it break in at lower Ghz first before OC? If so, at what speed and for how long?

Thanks.

 

[MichaelZ]

nah, breaking it in is something you do to cars not CPUs. if you're running default voltage, that chip's fine for 6 - 10 years.

 

[hytek369]

nice chip

 

[Tuvoc]

Perhaps, 10 mins of Prime95 isn't exactly an exhaustive test of stability. Sure, it means that chip isn't in the flaky as hell category, but equally it may not be long term stable.

 

[jhurst]

Yes, I had my 2.8C running @ 3.7, it makes it through between 2-3 hours of Prime95. Not stable enough for me. I back it down to 3.6 and fully stable for 24+ hrs. You know, there comes a point where more MHZ really means nothing....I mean, can you tell while playing UT2K4 if your CPU is running @ 3.6 or 3.7? No....I think we have reached the point where more MHZ isn't going to change anything. Now they need to start increasing bandwidth

 

[smahoney]

I have been running my M0 at 260 for awhile and played around with 266 last night - not stable at stock voltage so I am going to try with a bump of a half volt or so - but it was a little warmer in my room last night than normal.

Would love to see if I can get 3.725GHz out of this chip. 3.64 is perfectly stable. Might have to relax my mem timings. If I can't keep the timings at 266 I will probably go back to 260 - depends on the benchmark results.

 

[smahoney]

Upped voltage last night to 1.6 and started PRIME95 at 266MHz FSB- still running fine this morning, but my computer room is VERY warm. 3.725GHz out of a $175 CPU - and memory still running at CAS 2.5 1:1 at 266MHz!

 

[Yourself]

Overclocking is luck of the draw....end of story.


I have a 30 cap 3.0 and it won't do more than 3.3 at default. Go figure....


Self



PS-Nice chip

 

[hytek369]

Originally posted by: Yourself
Overclocking is luck of the draw....end of story.


I have a 30 cap 3.0 and it won't do more than 3.3 at default. Go figure....


Self



PS-Nice chip

where did you buy yours from?

 

[MichaelZ]

Originally posted by: Yourself
Overclocking is luck of the draw....end of story.

I have a 30 cap 3.0 and it won't do more than 3.3 at default.

dude, for real? stiff luck...

 

[jiffylube1024]

Originally posted by: jhurst
Yes, I had my 2.8C running @ 3.7, it makes it through between 2-3 hours of Prime95. Not stable enough for me. I back it down to 3.6 and fully stable for 24+ hrs. You know, there comes a point where more MHZ really means nothing....I mean, can you tell while playing UT2K4 if your CPU is running @ 3.6 or 3.7? No....I think we have reached the point where more MHZ isn't going to change anything. Now they need to start increasing bandwidth

Oh it helps, but not 3.6GHz > 3.7 Ghz.

If you could get another Ghz out of the chip, ie from 3.6 GHz to 4.6 GHz, THEN you'd notice quite the difference (especially with the newest gen of video cards).

 

[FelixDeCat]

Originally posted by: Yourself
Overclocking is luck of the draw....end of story.


I have a 30 cap 3.0 and it won't do more than 3.3 at default. Go figure....


Self



PS-Nice chip

If your selling, Im buying.


I am currently using (until I sell this week) a 30 cap 3.4C that is running at 4.0 gighertz rather smoothly, I might add. I have two of these, one is already sold but unpaid for.

 

[baclips6]

just got mine from zipzoomfly, also 30 caps
SL6WT, pack date 05/04/04

 

[AristoV300]

I don't really think the 30 caps aids any in overclocking. It is pretty much just luck. I have seen plenty of d1 steppings do just as good as the M0's.

 

[babyk]

here's my D1 doing 3.8Ghz at default vcore

P4 2.8C @ 3.8Ghz


using air cooling(zalman CNPS-7000A-Cu)

 

[S4M33R]

w00t the celery OCs like a monster... I never knew

 

[yourdeardaniel]

just open my replacement 2.8C from Intel
it's 30 caps - pack date 5/19/2004. my last one was 12 caps.

 

[babyk]

does the D1 stepping same with M0 now?