Can I run my Thunderbird 1000/200FSB at 266FSB on KT133A?

[jonmcg]

I have a Retailed Thunderbird 1Ghz/200FSB processor, If I buy an Asus A7V133 Motherboard, can I then inturn just change the multiplier from 10 to 7.5? It's very important to me to run the memory at 133Mhz as well as the Processor at 266FSB.

I thought Thunderbird chips were multiplier locked forcing me to run my 1Ghz at 1.33Ghz if I want 133Mhz RAM/266CPU? Does this make sense?

Jon

 

[Noriaki]

7.5x133 = 1000 = 10x100

Doesn't matter to the CPU, if your multiplier is locked youll just have to unlock it.

If you run at the standard 10x multiplier then yes, pumping up to 266DDR FSB will put you at 1330Mhz.

 

[hifimaster]

Yep,it should work (7.5 x 133= 997.5mhz)

 

[jonmcg]

But how do I "unlock" the processor? Just make a dip switch change on the mobo or jumper change? I, unlike most, still prefer jumpbers and dip switches to maintain consistency across bios updates. I figure once I set my CPU speed (I tend to be conservative anyway), I just leave it the way it is and go.

Jon

 

[Noriaki]

You set the mulitplier and FSB with the Jumpers/DIPs. But you have to make sure that your CPU's multiplier is not locked at 10.

Do a search for L1 bridges in the forum.

There are a couple of little traces running across the top of the chips ceramnic base. The L1's need to be connected, if they aren't you can connect them.

 

[GT1999]

You'd need to connect the L1 bridges on the CPU with something like a conductive pen, loctite rear car defogger repair kit, or even just a pencil. You connect all of the traces to make the CPU "unlocked".

 

[hifimaster]

Here is a guide to unlock it