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Is there a good way to OC you xp1800 without unlocking?

J

jinduy

Diamond Member
unlocking looks risky.....did anyone successfully OC their xp1800 to around 1.7ghz without unlocking by messwing with the fsb or something? Any tips or help or experience? thanks, my system runs around 39-40(rarely hits 40) on a full load................


and my chip is the agKGA version(if it matters), running on a beautiful antec 300w psu
 
Yeah increasing the FSB will overclock the chip. If you up the FSB to about 147 MHz it should get your chip around 1.7 GHz. Whether or not the chip, and your system will be stable at that speed is a whole other issue.
 
Recently got a 1600+ for my Abit KR7A-Raid myself and it runs like a dream at 152MHz fsb x 10.5 = 1596MHz. This is easily the best o/c cpu I've had, bar my old 366MHz Celerons... The temp his 45C while idle and around 55 under heavy stress (Prime95), but that's well within spec so no problem (using GW CAK-II 68 cooler). I'm sure it would go even higher without a better cooler and higher still with one, but I won't bother pushing it any more.

Agrippa
 
right now, i have a XP 1700+ at 1628Mhz (11x148) with default voltage. this is a locked cpu.. didnt want to even mess with unlocking it since it seems like too much hassle. and knowing myself, i'd probably botch it up.. 😛

im using an alpha pal8045 with a sunon 39cfm fan. inside a antec sx1030 case with 4 panaflo l1a (2 intake/2 exhaust).

i really havent stressed the system other than running 3dmark2001se. but at least it didnt crash while running that.. i'm hoping to get upto 150fsb and that's about as far as i wanna go.. crossing my fingers on that.. $140 investment in a Athlon XP 1700+ getting almost the performance of a XP 2000+ would be awesome..

and even though my dragon+ is not considered a very good overclocking board, this is by far the most successful overclocking ive done on any of my systems.. im quite happy with the results fwiw 🙂
 
OK if you want to overclock your CPU without unlocking (which would enable you to change the multiplier) your options are reduced to overclocking the FSB.

Your multiplier is set at 11.5. Bearing that in mind:

11.5 x 133 = 1533 (that is stock multiplier, FSB etc, and gives stock speed)
11.5 x 140 = 1610 - you should be able to clock your FSB to 140 without any trouble whatsoever. That would give you a chip running at 1610 MHz - faster than the Athlon XP 1900+ (which runs at 1600 MHz)
11.5 x 145 = 1667 - This is quite an FSB overclock. You may experience problems here, however this is Athlon XP 2000+ speeds... 🙂

Good luck! 😀
 
thanks and if i do this, the worst thing that could happen is my system freezing up right? my cpu wont fry?
 
I should have mentioned -

Be careful (obviously) when you overclock. You run at 133 by default, so take it in small steps. Try overclocking to 137 or something to start with, your system should boot normally etc, however you should be running at the higher FSB (and therefore CPU frequency).

If you are confident that your system is OK (you can tell if it is stable etc), then overclock a little bit more, say to 140 FSB.

Just repeat the procedure. Etc.. 🙂

What not to do is clock your FSB to 166 immediately... 🙁 Never do that. Once you get past 140 FSB, make sure your system is really OK (stress test it) before going on any further. In my system, at a low overclock it may be fine for about 5 hours etc. At a high overclock (148 FSB) then the system might crash once I boot up and run Quake 3 for 45 seconds... you get the idea. At a higher FSB the system becomes more fragile.

The only way you could fry your CPU is with too little cooling. That is important, and you need to make sure CPU temps are OK at a cirtain point before going up to the next one.

Get back to us with how it goes 🙂
 
Here's my o/c methodology. There's bound to be innumerable others, but this one works for me...

Get hold of a program which monitors you CPU temp (like Motherboard Monitor or Hardware Doctor) + a stress test program like Prime95 or Sandra. Then o/c the fsb in 5MHz increments, each time letting Prime or Sandra run for a while (I'm basically very impatient, so I give them just an hour or so) to see if it's stable. If it is, up the fsb 5MHz over and over until you either can't boot up or the stress test crashes the machine. In case of the former, reset your CMOS, re-do all the BIOS settings and lower the fsb to the former speed. In case of the latter, just reset the fsb to the former successful speed. The boot up and let prime/Sandra/whatever run for 24 - 48 hours to make sure the system really is stable. End of story.

Just remember that NOT ALL CPUs OVERCLOCK WELL, OR AT ALL!!! Just because you bought the most generally overclockable brand/series/stepping/etc of processors in the world, does NOT mean that yours will overclock at all, or more than a few %. There is NO way of knowing before you try!

Agrippa
 
I've overclocked the fsb on XP1800+ to 146 without any problems. FSB147-149 boot ok but will drop out of 3DMark2000. FSB of 150 blue screens going into Windows. Using SVC's GC68 Aluminum heatsink with CPU temps of 34-39C from Motherboard Monitor. This is all on an EPoX 8HKA+ motherboard at default voltage settings. Might get higher with increased voltages but unlikely to get appreciable performance increase for the trouble. Just one experience.
 
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