FSB setting & Multipliers

[Guest]

I have Tbird type B 900mhz and I want to overclock mine to 1Ghz. My question is , is it better to increase the FSB to 111mhz * 9 = 999mhz or lower the multiplier so that 7.5 * 133 = 1000mhz. If lowering multiplier gives better performance, can anyone give me a link that explains the difference between those two methods? Also, what is the maximum FSB that Type B Tbirds can handle? Thanks alot for those who can answer my Q.

 

[Guest]

Here: http://www.anandtech.com/showdoc.html?i=1440

 

[mbaha]

If you have the kt133 chip set you will not get too 133mhz even though there are settings to get there. Personally I like to run my 1gig tbird at 104x12 I found that it much more stable to increase the mult then and the fsb a little.
mbaha

“Build your own you will love it more”

 

[Bombastik]

In my humble opinion 1000Mhz is allways the same to processor wether if its 10x100 or 7.5x133 or 6.5x150..

There is a catch or two which you can read about it in Anandtechs article posted here. But first, what board/chipset are you using?

 

[Guest]

Sorry guys, I forgot to mention one thing. I am using VIA KT133A chipset.. I have Asus A7V133 motherboard
Currently, I am running my B type CPU at 9X120 mhz = 1080mhz and it's stable, if i go more than 120 without changing voltage and multiplier, it won't boot up. I don't know how to change multiplier and voltage yet, i've read few articles but I have to try it out myself...

 

[mbaha]

Close your L1 bridges and that will help get to 133fsb When you run at a 120 or something it will mess up your pci bus ect. But at 133 you pci bus will run at 33mhz were it should. You have pc133 ram right? So yes try to run at 133 fsb then see how high you can go with your mult.
mbaha


“Build your own you will love it more”

 

[slippast]

I'd say change your multiplier down to 7.5 if 1ghz is your goal. Your CPU should handle that perfectly and the FSB increase (100-->133) is where the big speed jump originates. Try 7.5x133 and see how that works for you. I have the same board and my TB850 is fine at 7.5x133=1ghz.

On the Asus A7V133a board the core voltage is most easily set in the BIOS. It's in the Advanced settings located directly under the Multiplier/Bus/Memory speed setting. Change it from System Default and try it at 1.85 that will easily give you enough headroom to move up to 1ghz.

Also, if you have the Asus Probe software installed check and see what your CPU temp is. (Could you also post it here? I'd be very greatful!) My board is telling me that my temp is way too high for what I'm running. I'd like to get some feedback from other Asus users on this. I heard it was just the way the Asus Probe application reports the temp that might not be accurate.

Good luck.

 

[wapaaga]

i would bump your fsb up to 133 like siad before becuase you actualy get better performance at 7.5 * 133 then you do at 100 * 10

this beacuse you can get stuff fiorm your memory faster with the 133 than you can get with 100

 

[Guest]

...Just a question...

Is a duron 750 able to run at 133mhz fsb if I just lower the multip.? I've overclked my duron but it wont go any further than 107 mhz with a mulitplayer @ 7.5 - 9.5...

<b>Voodoo</b><i>Child</i> 😎

 

[Guest]

multiplayer = MULTIPLIER!!!!!!!!!

<b>Voodoo</b><i>Child</i> 😎

 

[Lowlypawn]

If u want faster SETI times max the FSB.


<font color=green>Paranoia is just a higher awareness of reality.</font color=green>

 

[Guest]

Oh contraire Bombastic- FSB is better for 3d as memory is the bottleneck. Have to agree with the last post here on this and I have TONS of sandra-madonion bench data to back it up. I can get more FPS w/ lower speed provessor speed and higher FSB than the 1470 max MHZ this comp will run at. Anything over 150 FSB is great. I've gone to 156 at 4-way interleave- turbo-turbo- drive strength 3.

Screw the risks! -Street
-AMD 1470Mhz-Abit KT7A-Raid-256Mushrev3-Fop38