KT7A, tbird 900@ ?

[RocKo]

I'm running a KT7A with a cooling fan(Agilent Artic Cooler)
And I'll be modyfying my tower with extra fans.

I got a Athlon Thunderbird 900mhz.
with pc133 sdram cas2

what should I OC this processor to? i was thinking trying to reach 1.1ghz but do I want to lower the FSB speeds?
what is the conciquence of lowering FBS to 100mhz? will my ram work at pc100 instead of pc133? and does CAS ns go up?

What should I do?


<font color=red><b>-RocKo</b></font color=red> 😎

 

[Guest]

Im not sure about your motherboard, but on my A7V133, i can set the DRAM frequency independantly from the FSB, meaning that i can have an FSB of 100, and RAM at 133 and vise versa.
When saying "lowering the FSB to 100", i dont think that you understand that AMD athlon and duron CPU's (up until now anyway) run on a 100mhz FSB (doubled in a similar way to DDR memory to get the commonly known 200mhz FSB that they are advertised with).

So simply the answer is that lowering the fsb to 100 isnt possible, and you can still run the ram at 133 with and fsb of 100mhz!

Hope that helps!

 

[RocKo]

thanks for post.
if the atlhon comes with 100mhz set already then boosting the FBS with the multiplier is both as good.
BUT whats better? to try to get the highest FBS with a low multiplier? or lower fbs with high multiplier?


<font color=red><b>-RocKo</b></font color=red> 😎

 

[Red_Zealot]

The higher FSB should increase overall performance more thna a multiplier, but the multiplier is safer than FSB, both because the FSB affects so much stuff. OC it to however fast it will go. Max temperature 60 C. Go for it!


"If you teach a child to read, then him or her will be able to pass a literacy test" - George W.

 

[JOJO]

First , tell us if it is a "b" or "c" processor

If it's a b processor, you will have to unlock the L1 bridges to get it to run at 133 (266 ddr) FSB, which , if you bought the kt7a board , you will want to do. (i did the same thing with my tb 800)...

so give us some more info pleez

But in general, better to raise fsb (and lower multiplier a bit) until system becomes unstable. this is only with the kt133a chipset which you have on your board.

My tb800 is running right now (unlocked L1 bridges) at 933Mhz... 7.0 Multiplier x 133 FSB

 

[RocKo]

its not an Athlon-C 266 mhz. so i guess its just a regular athlon tbird "b" heh. Thankos.
what multipliers should i use if i want 133 mhz fbs

<font color=red><b>-RocKo</b></font color=red> 😎

 

[JOJO]

ok, it's not a c.
well, now you'll have to 'unlock' the cpu by connecting the L1 bridges on the chip surface. It's really easy, all you need is a graphite pencil and connect some dots. There are many articles on how to do this on the web, like on tom's site or on anandtech.com (i did mine in about 5 mins)

So, you connect these bridges (may have to do it a few times to get it right), then you are able to adjust the multiplier in the bios.

So, with that all done, for the default 900 Mhz speed, i'd suggest 7.0 x 133 which would give you 933Mhz. Then you can start to oc after that if you want.

ie raise the multiplier to 7.5 and see if it works, if not, try to raise the Vcore (up to the 1.85 max)in the bios.

keep raising both until you can't go any higher (if you want)

You could probably get to 8.0 or 8.5 x 133 (1130MHZ) with the Vcore voltage at 1.85.

I've been running my VCore at 1.85 for a long time now, so don't worry about it, some people do special mods to their board to get it up to 2.2, which is awesome for oc'ing.

anyway, hope that helps,

and keep an eye on your temps!