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Prescott (Model 3, Stepping 3, Revision C0!!)

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July 8, 2005 3:45:29 PM

hello, I got a p4 prescott 3.0e from an oem dealer, and I noticed in CPU-z it read model 3, stepping 3, but revision C0. This is weird becuase out of all the prescott cpu-z pics I've seen none have shown that C0 revision and I'm noticing that my cpu overclocks differently than others, I have to use totally different voltages, with certain fsb's than other people do. I was just wondering If someone could help me out here becuase I'm having toruble overclokcing this, and I was hoping for a point in the right direction.
Anonymous
a b à CPUs
a b K Overclocking
July 14, 2005 3:10:34 PM

Id google it some, lots of intersting stuff.
The C0 was the first stepping I think. That was the stepping use by THG when the review the prescott and it was a ES, engineering sample that is.

I think they resolved(thats a big word) some heat issues with the D0 and I believe the 630 are E0 stepping or maybe it a newer one im not sure.

<A HREF="http://www.overclockers.com/tips1179/index02.asp" target="_new">CLick</A>

Asus P4P800DX, P4C 2.6ghz@3.25ghz, 2X512 OCZ PC4000 3-4-4-8, MSI 6800Ultra stock, 2X30gig Raid0
July 14, 2005 4:34:43 PM

Ya, i've done some looking around for my cpu and I found an entry in the ABIT-USA forums about o/c'ing these, most people got them up to around 3.6 and above, but my cpu can't go above 3.52 ghz (235 FSB) with 1.46v, most likely my oem dealer sold me a lemon CPU which refuses to o/c properly. I've tested for heat issues and it isn't heat holding me back, i've tested 235 fsb even at 1.55v and the temp. never exceeded 55C. I'm thinking of trading it in to him and getting a 3.2ghz one in RETAIL BOX, and paying the difference. Trust me, this guy doesnt know [-peep-] about this kind of stuff like overclocking and modding and [-peep-], I broke a 6800le trying to mod the heatsink, I brought it into him becuase it was still under warrenty, and he took it without a problem, he had no clue. Anyway, If he give me about 150 for this one, I can grab a 3.2 for 78 bucks, and im willing to put money on it that it will o/c perfectly and probably hit 3.9 or 4 ghz easy on air. The airflow I got in my case is amazing and I got a nice big TT PIPE101 heatpipe heatsink on the cpu so it'll stay nice and cool, no need for watercooling.
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July 14, 2005 8:46:54 PM

I have E0 stepping Prescott 3200.

Do you think he has an engineering sample. Those are unlocked, are they not?

<pre><font color=red>°¤o,¸¸¸,o¤°`°¤o \\// o¤°`°¤o,¸¸¸,o¤°
And the sign says "You got to have a membership card to get inside" Huh
So I got me a pen and paper And I made up my own little sign</pre><p></font color=red>
July 15, 2005 6:37:28 AM

C0 was the first prescott stepping, it needs a hell of lot more juice and runs quite a bit hotter, and yes; it doesn't oc as well as the D1 and E0

my C0 3.0 stock was 1.525 did 3.45-3.6
my E0 3.0 stock was 1.44 did 3.8-4.0 max (hardly stabile at 4ghz though :p )
*or close to those values*

i'd advice him to get the 3.2 on E0

ASUS A8N-SLI-Deluxe - AMD64 3700+@4400+ - CNPS7000B-CU - 1024mb ddr500@500@2.5-4-4-7-11-24-2-2-1T - 6800GT PCI-E 400/1000 - 500W 140mm NQ-4775 Psu - WD740GD - LG 4162B - 19" MAG 996PF2
July 18, 2005 11:34:09 PM

i had a 3.2e with the c series stepping and i got to 4.3 not stable though
stable at 4.0
havent tried any of the new steppings yet



<A HREF="http://www.freewebs.com/lb19984/" target="_new">My Rig</A>
July 19, 2005 10:12:10 AM

Well that answers my question a bit as to why I cant hit 4 ghz with this thing, so in all reality, I dont really have a "lemon" cpu, I just have one of Intel screwups. I'm already planning on trading this in and getting a 3.2e, not sure which stepping, but I hope it's aty least d0 and not another c0, becuase then it'll be a waste of my 78 bucks =). And no, this is not an engineering sample, if it was i'd be jumping for joy and have a party, but it has a locked multiplier. I have this thing at like 3.54 stable at 1.46v for about 7 hours in prime95 so far, but starcraft crashes for some random reason, maybe i need to patch it.
July 27, 2005 4:52:37 PM

you should never test stability with just one program/game.

anyways, get that 3.2e, the chances of it being c0 are pretty weak since that revision is ages old.

you might have to run starcraft in compatible mode since it was made for win98

ASUS A8N-SLI-Deluxe - AMD64 3700+@4400+ - CNPS7000B-CU - 1024mb ddr500@500@2.5-4-4-7-11-24-2-2-1T - 6800GT PCI-E 400/1000 - 500W 140mm NQ-4775 Psu - WD740GD - LG 4162B - 19" MAG 996PF2
Anonymous
a b à CPUs
a b K Overclocking
July 27, 2005 6:11:26 PM

I personally love the NorthWood cores, the 1mb of cache doesnt do ,uch and SSE3 either(depend of the use thought).

The C will draw less power, and you shoudl still be able to get good OC form it.

Altoguh I realised you where shooting for 4ghz so maybe the E is the way to go the 90nm might help you some...

My cpu with 25% OC is running at 42 unde full load during the summer! thats the idle fo a prescot :redface:

Asus P4P800DX, P4C 2.6ghz@3.25ghz, 2X512 OCZ PC4000 3-4-4-8, MSI 6800Ultra stock, 2X30gig Raid0
!