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Overclocking Guide - PAGE 1

- Thursday, February 12th, 2004 Like Share


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Alpha Feb 13, 04
Exilent guide, thank you for your efforts in making that guide, it is going to help me overclock
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CleavesF Feb 14, 04
I dunno about Prime95. I used that with 3dmark03 for stress and it sucked!

I had my FSB at 187 with my barton 2500 and ran prime for 24 hours.

Then after that I ran 3dmark03, it wouldn't even get through one benchmark until I brought it down to 182 FSB. Sorta wasted 24 hours on a bench I didn't need to do.

I say just use 3dmark just because it's an everything benchmark.
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toucs Feb 15, 04
You failed 3Dmark because you might not have APG/PCI lock, or GPU overheat. Prime95 is for CPU/memory stability.

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CleavesF Feb 16, 04
Yeah I know I don't have a PCI/AGP lock. Thanks for stuffing it in my face... otherwise I'd already be running 200 FSB... :/
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Gxcad Feb 17, 04
run both at the same time;). Better yet, use something that heats up the cpu even more, I've heard folding is good...or stress cpu and memory seperately with videocard at stock then test videocard with 3dmark loop on only the most stressing tests. If you run the less stressing tests, that give the videocard time to "rest" doesn't it? Just some thoughts...

-Ken
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CleavesF Feb 17, 04
whoa, I never really thought about that one Ken.

Running both prime and 3dmark... talk about an unforgiving benchmark... so much for "inflating" my 3dmark scores ahah.

I'd like max OCed systems run that combo for 24 hours. You're absolutely correct, the videocard does rest during the loading screens in 3dmark... unacceptable!
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Ace Feb 17, 04
something to keep in mind is that there is latency when you switch back and forth between different threads and there will be idle cpu time. the onboard cache of the processor can only hold so much information and when you have to access main memory your processor will be idle and this might not be reflected in task manager.

the biggest advantage of prime95 is that the torture tests check the computed value against precomputed ones so you know if the overclocked processor / memory is slightly off. a few years ago, the people who ran SETI@Home commented that there were rounding errors from people who submitted work units from overclocked processors. it might not be too important if your computer is just used for playing games as a slight misalignment of a polygon or something of that nature isnt show stopping. but if your computer is used for any serious work (like something scientific or maybe art related) the consequences are a little higher
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Gxcad Feb 18, 04
Haha cleaves, I don't know if there is anything you can do about the loading inbetween tests, but you could turn up the stress by using higher res and maybe AA AF. I tend to use only the high detail benches for the games and avoid tests I think are not really high stress, but to tell you the truth I don't really know which tests are more stressing than which, its just guessing:D. Probably the most stress for the cpu is whatever makes it the hottest, and most stress for the gpu would be a high res high AA/AF heavy detail bench thats long so time of load vs time between load ratio is low. Recent gpu's such as the ATI XT series (9600XT and 9800XT) have a in die thermal diode so temps can begin to be measured to see which progs heat it up the most.

Anyway, yea I used to test very high stress, I'd throw in whatever it takes to try to crash a system during testing, don't want it to go during typing up a 10 page essay! If you run 2 or even 3 progs at once, whatever idle one program slips by, the other program catches it to keep it absolute 100% load, thats my theory, so I like the idea to run more than one stresser for a serious test. Recently I got lazy and just run whatever does a good stress...prime or sandra burn or folding...whatever for a few hours, then back off a bit to insure stability. This has worked well for me too, but doesn't really squeeze out every last mhz, which I'm sure a lot of you like to do;).

Is it possible to OC a 486? I wasn't aware...but I did oc a P2 a few times, I had a P2 Slot 1 233mhz multiplier UNLOCKED!! Yes, intel once didn't lock its multipliers until about the pentium 2 300's. I still have that 233mhz proc:).

-Ken
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Curelom Feb 28, 04
I heard the AMD started locking the multiplier on the Barton cores starting back last November. Can anybody confirm this?
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Alpha Feb 29, 04
Yes, i can,
but as for throughbred,
the craze wil go on.
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Gxcad Mar 12, 04
IIRC, amd's cpus started getting locked around ~35th week of 2003, meaning if you get a cpu manufactured after that week (APPROXIMATELY week 35) it is 100% multiplier locked, and can only be tweaked with FSB, making underclocking difficult and AGP/PCI lock, Northbridge cooling, and good ram more important.

For those of you who don't know, the loophole is the mobile athlon xp chips. They run perfectly in desktop systems and are still multiplier unlocked. Even better, they have a default voltage of 1.45 volts and have a TON of overclocking headroom! I've heard reports of 2.6ghz on air with only 1.85vcore! Find em at newegg;).

-Ken
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Cheesysoapopra Mar 12, 04
I have seen a few 2500 bartons at 2.6-2.8ghz with simple water cooling , and below 2volts.

I can get mine to 2.4 on air no probs, got the one with good stepping, one of the last non locked ones.

I dont keep it over clocked, nothing really challenges the system even at stock. (yet)
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hostile_ Jul 4, 04
So I want to overclock my Barton.Since it's multiplier is locked the only way to overclock is the FSB.My BIOS(on my nVidia nForce2 Ultra400) allows up to 250MHz when in expert mode.What stops me from going all the way, except heat which I think I'll be able to deal with using combined water and fan cooling?????My ram runs at 400MHz.
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Alpha Jul 5, 04
What is your question hostile?
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