Can't set correct clock speed...

[Mallow]

Well... I just built up my new rig with a new MSI KT3 Ultra mobo and an AMD XP 1800+. I put the components together and everything works fine except that I notice my cpu is registered as running at 1150mhz. I figure no problem, change the multiplier. I head to the bios and change the multiplier from default to 15x (I figure bus default is 100mhz and default multiplier is 11.5?) and restart the system, it hangs before posting. So... I short the cmos reset jumper to clear out that 15x value back to default and go back into the bios. I change the multiplier to 10,11,12,14... changing the values to 10,11,12 don't do anything but changing it to 14 locks the computer up before posting again. Anyone have any suggestions?

 

[Vic]

On an XP 1800+, the multiplier is locked at 11.5
Correct bus is 133.3*11.5=1533

 

[Mallow]

Thx for the reply. I can't believe I was unaware of this information. Don't I feel like a doof I'll definately try to step up the bus speed. Anyone know why they would lock the multiplier like that? I mean, what is the main benefit? Also, if the multiplier is locked why does the computer lock up if I change it to 14x or 15x? Just curious

Thx again and l8rz

 

[minendo]

Also, if the multiplier is locked why does the computer lock up if I change it to 14x or 15x? Just curious

Because the multiplier is locked at 11.5. You were getting 1150mhz because the CPU was running at 11.5 x 100mhz. If you were to unlock the multiplier, then you would be able to make adjustments and the computer has a better chance of booting at the specified multiplier and FSB.

 

[Mallow]

Minendo-

That probably made sense when you wrote it but makes no sense to me hehe What I'm saying is if the multiplier is locked @ 11.5 and no matter what I change the bios multiplier the cpu stays @ 1150mhz then why when I change the multiplier to 15 or 14 in the bios does the computer lock up? Nothing has been unlocked.

fyi PSYWVic: Good call, works like a charm @ 1.5Ghz now

 

[minendo]

Originally posted by: Mallow
Minendo-

That probably made sense when you wrote it but makes no sense to me hehe What I'm saying is if the multiplier is locked @ 11.5 and no matter what I change the bios multiplier the cpu stays @ 1150mhz then why when I change the multiplier to 15 or 14 in the bios does the computer lock up? Nothing has been unlocked.

When you change the multiplier to 14 or 15 the computer is trying to run at 14 or 15 x 100mhz, which is not supported. Frankly, I find it quite weird that the mobo even lets you change the multiplier since it is not unlocked. Some mobos allow you to change it, but if the processor is not unlocked it will lock up or return to default settings.

 

[Mallow]

ahh, much more clear that time... thx bud

 

[jaybee]

My Abit KT7a allows me to change the multiplier on locked processors. Of course it doesn't change the speed, and can cause the system to not boot if it feels like it. Unlocking the processor makes all parties happy tho

jaybee