What's your t-bird experience re: fsb speed?

xcourse

Senior member
Feb 9, 2001
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I've seen posts where the originator asserted that t-birds don't like high fsb speeds, even mounted on KT-133a boards e.g. keep 'em in the high teens. Then, in the same thread, someone else checks in with a system set in the range of 150 or so. What's your experience on the subject; what do you conclude from your experience, and why?
 

compuwiz1

Admin Emeritus Elite Member
Oct 9, 1999
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They work.

Virtually every Tbird I have tested, and it is many, would work on 133MHz fsb. The limitation is the chipset, KT133 vs.KT133a.

As an example, if I have a 1.2GHz Tbird and it will do 1.4GHz, it will normally run on 10x 140

750 Tbirds at 1GHz do 7.5 x 133. Haven't found one yet that won't, if I can get the multiplier down.

 

xcourse

Senior member
Feb 9, 2001
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Thank you, Whiz!

Anyone else?

Speaking for myself (and I'm really still a newbie), Windows grenaded itself when I tried running my listed system at 11.5x118. The memory had no trouble with it, I'm sure, but everything else in the box gagged on it. So now I'm running at 9.5x140 and hanging in there, although I'm reluctant to run Prime95's torture test and find out the sys isn't as stable as I'd hoped.
 

DARRIN

Platinum Member
Feb 25, 2000
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Fsb speed is only limited by your chipset on mobo and your ram as far as I know. You tried upgrading your fan on your northbridge chip and putting some heatsink compound on it?
 

Duken4evr

Junior Member
Mar 10, 2001
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I explain your experience as follows:

At 118 your divider is 1/3, for a PCI bus speed of 39 Mhz, which is really pushing it.

On the other hand, at 140, the divider drops to 1/4, and your PCI is breathing easy at 35.

Sounds like you have a good setup going!