Multiplier and FSB settings

[michaelf3]

What settings are you using for multiplier and FSB? This is in regards to an AMD 1.4 GHz.

[chawken]

Originally posted by michaelf3
What settings are you using for multiplier and FSB? This is in regards to an AMD 1.4 GHz.

On mine I have the multiplier at 11 and FSB @ 148, vcore at 1.80v. I am using NEC VC133 (virtual channel memory) which is holding me back. I have Corsair PC150 CL2 memory in route, and as soon as I get it installed I will be changing to a multiplier of 10.5 (CPU default) and up the fsb to around 160 to 168.

[chawken]

A quick little trick. If you have a good PSU, good memory, and good cooling then do this. When you get your rig assembled, set your fsb at 133/33 and raise the multiplier to 11 (1.466). If everything runs O.K. then bump the multiplier up to 11.5 (1.533). Again, if everything is stable, bump it up to 12 (1.600). Run the unit for 24 to 48hrs with every CPU intensive program that you can. If everything is stable after that, go up to 12.5 (1.667). Again, run everything you got for about 24 to 48hrs. Raise the multiplier until the system becomes unstable.
Now the trick - if your last multiplier setting, that was perfectly stable was say 12 (1.600), use that as your base line target. Default multiplier on the 1.4 is 10.5 - so take your multiplier back down to 10.5 and set your fsb to 152 and use that as your baseline speed. If your system boots and runs stable, then start increasing your fsb 1 or 2 mhz at a time, until you find its limit.

For performance - the higher the fsb, the better.

A PC with the settings of 10.5x152 = 1.596 will be a better performer than a PC set at 12x133.33 = 1.600 - much better.

[wildbilly2k]

you know the default multiplyer for a 1.2 t-bird is???

[michaelf3]

I just got the chip along with two Samsung 256mb DDR 2100 and the Abit KG7 Raid. I tried toying with it last night. Just thought I ask what are my possibilities. Thanks for the responses.

[Goldwing]

Originally posted by wildbilly2k
you know the default multiplyer for a 1.2 t-bird is???

If it is a "B" bird the default multiplier is 12x at 100Mhz. If it is a "C" bird then 9x at 133 Mhz.

[wildbilly2k]

yeah thanx man

[chaosdriven]

Originally posted by chawken
A quick little trick. If you have a good PSU, good memory, and good cooling then do this. When you get your rig assembled, set your fsb at 133/33 and raise the multiplier to 11 (1.466). If everything runs O.K. then bump the multiplier up to 11.5 (1.533). Again, if everything is stable, bump it up to 12 (1.600). Run the unit for 24 to 48hrs with every CPU intensive program that you can. If everything is stable after that, go up to 12.5 (1.667). Again, run everything you got for about 24 to 48hrs. Raise the multiplier until the system becomes unstable.
Now the trick - if your last multiplier setting, that was perfectly stable was say 12 (1.600), use that as your base line target. Default multiplier on the 1.4 is 10.5 - so take your multiplier back down to 10.5 and set your fsb to 152 and use that as your baseline speed. If your system boots and runs stable, then start increasing your fsb 1 or 2 mhz at a time, until you find its limit.

For performance - the higher the fsb, the better.

A PC with the settings of 10.5x152 = 1.596 will be a better performer than a PC set at 12x133.33 = 1.600 - much better.

I totally agree!

I've experimented around with different Multiplier/FSB settings in the 1500-1550 range. The higher FSB is definitely preferable, yielding significantly shorter completion times for seti for the same overall speed.

[fresh2k21]

wouldn't it be better to just set the multiplier at standard and slowly start raising the fsb until it becomes unstable. the back it off until it becomes stable again. then slowly raise the multiplier until you max out. but my question is when is it better to raise the voltage? when you first become unstable with the buss or later when you become unstable with the multiplier adjuctment?

[chaosdriven]

Originally posted by fresh2k21
wouldn't it be better to just set the multiplier at standard and slowly start raising the fsb until it becomes unstable. the back it off until it becomes stable again. then slowly raise the multiplier until you max out. but my question is when is it better to raise the voltage? when you first become unstable with the buss or later when you become unstable with the multiplier adjuctment?

That may not let you get the highest possible FSB settings. In my case I could get up to about 1540 (10*154) on the default multiplier. Increasing the CPU voltage did not seem to help and just added to the heat problem.

Increasing voltage on the memory let me get the FSB higher. This did not appear to impact CPU temp or the 5v rail much if at all. All this on a lower than default CPU multiplier with minimal increase to the CPU voltage.

In general, I think you are better off if you can get away with minimal voltage increases.

That's just been my experience with this system.
Anyone have some different observations?