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View Full Version : Overclocked XP1800 to 1662 but doesn't show up as that in WCPUID

Martin Kaareng
11-13-01, 05:52 PM
Why doesn't it show up as 1662MHz in WCPUID when I changed the muliplier in the BIOS?

Thanks,

Martin
Jon
11-13-01, 06:07 PM
What does it tell you it is at your POST screen when booting up?
Martin Kaareng
11-13-01, 06:20 PM
1533

Martin
bigfoot
11-13-01, 06:24 PM
if it say's 1533, that is the 1800+'s default speed, so have u tryed unlocking it yet because if you dont it will just ignor any manual settings.
Jon
11-13-01, 06:24 PM
Sounds like your multiplier really isn't changed then.

Did you unlock it when you got it?
Martin Kaareng
11-13-01, 06:33 PM
First of all, I don't know how to unlock it. However, by changing my FSB speed to 135 and upwards I see increases in WCPUID as well as the BIOS showing 1600MHz at startup.

Is there a difference between overclocking the FSB and changing the muliplier?

How do I unlock the mulitplier?

Thanks,

Martin
plague
11-13-01, 06:42 PM
Ya, you cant change the multipliers without unlocking it - might be tough if you didnt know that you had to... no offense, im just saying, but here you go...read this a couple times before you jump in..

http://www.overclockers.com/tips693/
dugans
11-13-01, 06:56 PM
I unlocked my xp 1800 but have since found that I get a better oc with the stock multiplier and high fsb-150 in bios= 1725mhz.

I can get no more out of this setup with either mult. or fsb.

So you may want to try the fsb route first- it speeds up the whole system anyway, instead of just the cpu, so it SHOULD be faster overall with an fsb oc than with mult.

Tha's my theory anyway!

Good luck with the oc!
Jon
11-13-01, 06:57 PM
The multiplier will allow you to increase your core speed without affecting your bus any. For instance, your chip at default runs at 1.533MHz which is a multiplier of 11.5 times a front side bus of 133MHz (11.5 X 133 = 1533).

If you raise the FSB to 150 you get 11.5 X 150 for a core speed of 1725MHz.

However, you can unlock your XP by filling in the L1 gaps using the directions posted here (http://www.ocinside.de/index_e.html?/html/workshop/socketa/xp_painting.html). This will allow you to change your multiplier of 11.5 to whatever the limit of your board is.

You could have a bus speed of 166MHz and a multiplier of 10 for 1660Mhz. This gives ungodly memory bandwidth while raising your core a respectable level. If the memory or other devices don't like that, you could do a multiplier of 12.5 X a 133MHz bus for 1663MHz, or a multiplier of 11 X 150MHz for 1650MHz and better memory bandwidth.