How safe am I?

entropyentropy Yah-Der-Hey (Wisconsin)
edited October 2004 in Hardware
I'm on a 2.8 that I've had to 3.2 for a long time. Recently I got bored. Never a good sign. So, I pushed it to 3.3. My chip doesn't like 3.3 ghz. I had to kick it up to 1.68v to get it to even load Windows. Used to be I could run 3.2 on stock voltage, but it started wanting more for some reason, and I've been running it at 1.5875 or thereabouts. So, where is SNDS? I've heard it's 1.7, but I've also heard it's 1.75. Which is correct? I really don't want to lose this chip, lol.

Just out of curiosity ... who here owns a 2.8ghz Northwood and how far have you pushed it? And WHY do the voltage settings go from 1.58ish to 1.68?! What happened to everything in between there?

Comments

  • LeonardoLeonardo Wake up and smell the glaciers Eagle River, Alaska Icrontian
    edited October 2004
    Northwood 2.8 @ 3.5 - for over a year now at 1.575 vCore as indicated in BIOS. I don't know why you have to pump your vCore up so much. What mobo are you running? Have you measured your vCore with CPUZ?

    What's your CPU core temp under load/under idle? The hotter it gets, the more voltage is required to boost frequency.
  • entropyentropy Yah-Der-Hey (Wisconsin)
    edited October 2004
    Oh man. I'm green with envy :(. Max load I get around 39*C (used to be a lot lower...) and idle it varies between 24 and 26*C depending one what I'm doing.

    I noticed you have a different stepping and revision than I do ... I got mine right around February '04. So maybe your stepping, etc is better for OCing?

    Edit: Wow. That's messed. It shows on there as 1.64, and I don't know why. I just reopened it and it was at 1.68, pretty steady...

    oh - Gigabyte GA-8IPE1000-L rev. 2
  • LeonardoLeonardo Wake up and smell the glaciers Eagle River, Alaska Icrontian
    edited October 2004
    3.2 -3.3 is a typical OC for a P4C Northwood. I purchased mine in July 03, second hand through a private deal. Guess I got lucky - 3.5 is the upper end for air OC on these chips. Bar none, it's been the best CPU I've ever had.
    Max load I get around 39*C
    That's not bad at all. That's actually cool for full load. I run 52*C at full load. Your 39 reading - is that from the BIOS or from software monitoring?

    Are you running your DRAM/CPU asynchronously, or a 1:1 ratio?

    I still don't understand your high voltage, though. That just doesn't seem right. The Northwoods are not power hungry at all. Makes me wonder if your monitoring instrumentation or thermistor is way out of whack. I also have a hard time believing your CPU is only 39*C at the voltages you stated, and under load. When you say "load" - what, Prime 95, Folding@Home?
  • entropyentropy Yah-Der-Hey (Wisconsin)
    edited October 2004
    It's in a 1:1, seeing as how I stupidly bought some ddr500 thinking I could really OC. Stupid idiot me, I forgot to try changing to a 5:4 to see how far the chip could go. But, the 39*C under load ... I have an SLK-947u on there with a SF-2 using the thermistor to control fanspeed. I used to get 33*C load, but it's hot in here right now. I've also checked with a separate temp sensor - gives the same thing.

    As for the reading ... when idling in BIOS, it's at 32*C, and when I first boot to windows, that's where it's at. So I think BIOS/software are pretty close to each other. And seeing as how I tested it with a probe, they're both pretty accurate.

    By load I mean using 10 rounds of cpu arithmatic and multimedia via SiSoft Sandra. I don't have Folding or Prime on hand anymore.
  • LeonardoLeonardo Wake up and smell the glaciers Eagle River, Alaska Icrontian
    edited October 2004
    You may not see a higher clock on that P4 - it may just be an ordinary (but good) CPU in a series.

    I am by no means an overclocking expert; I've just been dabbling in it since my first home build - Abit KT7-R, Athlon Socket A 900@1100. All I can say is that you are definitely not overheating that CPU, but the indicated vCore is really high. BTW, I'm running FSB/DRAM asynch at 5:4; DRAM at CAS 2, 6/2/2.
  • edited October 2004
    Entropy, that overclock isn't stellar, but isn't bad either. My 2.6C will just do around 3.2 folding stable 100% and my 2.4C will go around 3.4 100% folding stable. Your stepping is actually better (supposedly) than Leo's; his is a D1 stepping and your is an m0, which is a reject Xeon chip with the L3 cache disabled. The m0 stepping procs tend to run just a tad cooler than the D1 stepping P4's too, but don't try to remove the IHS because the m0 procs were the first to use the new bonding system that actually solders the core to the IHS (Presshot uses this too) and if you try to remove the IHS, you will rip the core from the body of the proc.

    As far as your temps vs Leo's, he's using an IC7 mobo, which reports temps around 10-12 C high. If you are using an Asus board, they tend to report temps on the low side. It's all how they have them set up in bios to read and it also affects temp readings with MBM because of the way the board reads the diode sensor.

    My 2.6C is a D1 stepping and my 2.4C is an m0.
  • Straight_ManStraight_Man Geeky, in my own way Naples, FL Icrontian
    edited October 2004
    PSU, probably undervoltaging the CPU. That would show up in fluxes, so would a graphics card eatting a lot of voltage and draw occassionally, which would toss the effective voltage or amperage or both to CPU down when other things needed lots of umph from same PSU leg at same time. I run a slightly more modest OC here (in percentage of actual CPU base versus OC), but live in a real hot climate. Hot climate can affect how far you can OC on same board and CPU. Looks like your PSU is seeing intermittent load peaks and CPU voltage is dropping and then being forced to stabilize by BIOS and Power control circuitry on motherboard. Leonardo is in a bit cooler climate than am I here-- right now my room is at about 84 F and it fluxes from 80 to 84 ROOM TEMP. Leonardo is also water cooling, right Leonardo??? THAT helps some with OCing also.

    My temps for CPUs (one Northwood and one Prescott), under folding and other use load, are about 50-51 C with very intense Air Cooling in force and the boxes are kept squeaky clean of dust and dirt inside and out. I also am using boxes htta are not double width server boxes but are ten bay Antec boxes (full size towers, sizing of a 1040 Performance series Antec case, BOTH of them) so have lots of air volume to spread heat and lots of flow also. Look at cooling, think about recent upgrades and the power draw that goes with them, and consider that kind of thing as well as pure voltages.
  • LeonardoLeonardo Wake up and smell the glaciers Eagle River, Alaska Icrontian
    edited October 2004
    Leonardo is in a bit cooler climate than am I here
    This is the same CPU, same clock I had in Augusta, Georgia before moving here. What can I say, it's just a very good chip.
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