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3.0 2MB L2 cache not found in iNtel db? OC'ing advice needed.

W

Wiz

Diamond Member
I put this together yesterday, it's the third prescott system I've built but this is the first 775 system I've put together.

Here's what I've got:
P4 Processor 630 LGA775
3 GHz 2MB L2 Cache 800MHz FSB
BX80547PG3000FSL779 (the last "7" there is underscored)
MM# 869547
Version# C98474-002 1.4V max Pack Date 02/14/2005

ASUS P5P800 motherboard
FSB @ 220, memory @ 400 dual channel (2x512M PC 3500) @ 2.5-3-3-6


I can not find the cpu on iNtel's site @ http://processorfinder.intel.com/scripts/list.asp

What's a safe vcore to run?
What's a safe temp to go up to?
The cpu fan seems to run at about 2500 rpm while the cpu is at about 62c - which seems kind of high but I don't know what's high for this type of cpu. That's at full load running two instances of seti@home classic btw.

It came with a huge round HS & very large fan, very nice for a stock HSF. I just mounted it as - is using the thermal pad or whatever they had stuck on there.

The side of the case is open, with cool air flow atm.

I was experimenting and found it posted fine @ 3.75ghz with relaxed memory settings.
I don't really need to see a high number here, just want to have a fast system.
Currently running about 3.3ghz.

 
did you get teh spec number off the chip before you installed it( it will say something like SL6EX) Doesn't look like they updated the list with the 600 series chips yet. I would say not to go higher than about 1.525v, but as you increase the voltage, it seems the throttling kicks in at a lower voltage. You do realize you won't be able to use the EM64T with that motherboard right? If you temp is at 62c thats about average. My 3.2@3.6 runs at 63c under heavy load, and my 2.8 @ 3.5ghz also ran at about the same temp. My 3.4 on the other hand was running at over 70c even with a Thermalright XP-120, and I had to go to water cooling to prevent it from throttling at even default speed. Having the side of the case open, will actualy disrupt your airflow..if you are getting higher temps with the case closed, you need to improve your airflow.
 
No, didn't look at the cpu itself.

Well, I lowered the mem to 320 & upped the FSB to 250 for a 3.75ghz cpu.
I'll see if it runs good like this for a while before trying anything higher 😉

Running Windows right now, two seti processes pounding away.

cpuz says my fsb:mem ratio is 5:4 with FSB @ 250 & mem @ 200mhz
This is interesting, I was wondering how that worked in the bios.
 
that's a good OC. Intel's run much better at 1:1. I recommend you invest in some pc-4000 or higher memory. You want to go no higher then 1.525 vcore or 60C under load.
 
Using Artic Silver instead of the attached thermal pad on the heatsink will help reduce your temps. In regard to temps, I have a 640 and I'm able to get up to 3.8 at 240x16 1:1 at stock voltages, 1.4v CPU and 1.8v DD2. Under load, I'm around 48c for temps. I am using a XP-120, lots of fans and airflow.
 
All out of AS - should have ordered some when I ordered the cpu.

I ran Throttlewatch, yes it is throttling TM1. 🙁

I'll cut back on fsb & see where it goes away - then I'll try getting some AS & reseat the cpu & test again.

Thanks for the help!
 
Heat should not be an issue with that cpu. I have the 3.4 version and after 2hrs of Prime95 at 4.2ghz, 262fsbX16, it only reaches 46c. I'm using a Swiftech HS and 92mm fan with Ceramique compound. I don't think I'd go over 1.5v max on air. Mine does 4.25 at 1.45v. You really need a better board to get the most out of that cpu. I have the Asus P5AD2 Premium and can disable the throttling in bios. If you get a different board, go with one that has the 925xe chipset. The 915p and 925x (which is what I have) are limited on the fsb they will run. I can only do 265fsb and the 915xe's will do well over 300fsb. I just ordered a new board so I can get away from the limited fsb. I have a thread on my results with this cpu and a 3.6es on the same board over on "Bleedinedge" forums, check it out and maybe we can help each other:thumbsup:
 
Get a really big passive heatsink, just have it sitting on your desk and use it to heat up your house in the winter. 😉
Click to expand...

Hey, I have 4 machines here running seti 24/7 and they do heat my house - all year round.

I've lowered the cpu speed to 3.4ghz & set mem @ 1:1 (227mhz - 454ddr) & things seem stable atm. Throttlewatch is indicating no throttling. I'll settle here for a while unless I notice some instability.
 
boshuter, I saw this board has an option to disable throttling but I didn't feel that would be "safe". Especially around 60c - 65c temps. I've got it running @ 1.475volts right now btw. No more throttling at all.

I was impressed by the size & design of the HSF that came with this cpu. Best I've ever seen in a retail HSF. Kind of reminds me a little of the old "Golden Orb" HSF. Heat sink is massive, the fan sits on top. I'm not sure it's getting great airflow though - something I need to check into.
 
I don't think you can disable the P4's built in throttling.

The throttling in your BIOS is throttling done by the mobo, I believe.
 
I plugged in my other system fans & now it's running a bit cooler.
40C idle 52C full load (2x seti processes). This is pretty acceptable, if I can live with the noise.
 
Update:

I've lowered the voltage to 1.45 and tried increasing the fsb.

@ 233 fsb I got a restart in Windows, so I lowered it to 231mhz and so far everything is stable. Still running two instances of seti for 100% cpu utilization and temp is about 52c. It cools off to 42c at idle, with a mobo temp of 44c - this isn't bad.

CPUZ says I'm running 3465mhz with a 1:1 fsb:mem ratio with 2 megs cache running full speed.

Throttlewatch says zero TM1.

At this point I believe I'm limited by my memory. CPUZ reports it as PC3200.
Maybe later I'll buy some faster ram & install better cooling so I can see how high this baby will run. For now this is very good & meets my needs.
 
I have the same board but the 650, did you manage to find the CPU lock free submeu in the Bios under CPU section? This was a feature that allowed some 5xx cpus to run at 14x multiplier so allowing overclocking of the FSB to high levels. I wanted to run the board at 266 FSB and 14x multiplier so acting like the 3.73 EE but I couldn't find the menu using a 630 and my later 650. Any ideas?
 
I don't see anything like that on the P5P800 board.

Why does changing the Qfan settings in bios not seem to do anything?
 
I think it was available on P5GD2 and P5AD2 for some 5xx cpus, usually those on the higher thermal specs like 550, 560 and 570.
Changing QFan will affect those fans connected directly to the MB for sensors and power.
 
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