AMD Tbird 750... 133fsb x 6x multiplier? How? L6s?

[Syndicate]

Hey guys,
I got an AMD Tbird Socket A 750... I am using a MSI KT7 Pro2a. I would like to alter my current settings of 7.5 x 100 (i have ran it 9 x 100 = 900, nice and stable) to something along the lines of 6 x 133 = ~800. My motherboard BIOS do not allow decreasing the multiplier below the default. So I could only do 7.5 x 133 = ~1000 and it won't be stable at that. I know you have to change the L6s I believe. The other problem is that in the BIOS settings I cannot change the FSB to 133 or above! I can set it to 100-132. I know it supports up to 166 I thought. I am using the latest overclocker's/power user's BIOS and have tried the latest normal BIOS as well. Is there another hardware change on the CPU to make in order to change the fsb to 133? I have already unlocked the processor and set the boot-up voltage to 1.85 via the L1s and L7s. Thanks for help in advance!

*EDIT*: I have viewed this link : TOM'S HW AMD Settings : and I see that some of the connections MAY have to be cut in order to down clock it! Now, if I were to try to cut them, what tool would I use? And no I do not have a dremmel. Also, do I have to play with the L3s and 4s like it appears on that page? THANKS!

 

[Davegod75]

your mobo doesn't support the 133mhz bus speed. There's no way you'll be able to run at the bus speed. The highest i've gotten mine to is 115.

MSI has just released a new bios that allows you too lower the multiplier below default. However it is not flashing for some reason
BIOS Lock String doesn't match your system is the error people are getting

 

[Syndicate]

What why wouldnt it work at 133? Its a KT*133* chipset!! What does, the ASUS and ABITS?

 

[Syndicate]

New KT133A boards only huh? I thought people have been doing the ol' change default 800mhz TBIRD (8 x 100) to (6 x 133) for a while now..

 

[Syndicate]

new OC bios allow dropping multiplier below default, however the fsb is still maxed at 132 ... and it wont even post at 132 x 5 which is stock speed. and im running at 900 now. i thought the original KT7 supported FSB133 or so it says at the MSI site, why would it not work on the newer PRo2a?

 

[Regalk]

You are way off base here. Suggest doing a bit of research on the KT133 vs KT133A chipsets and then tackle your board.

 

[Dark4ng3l]

you need to unlock the chip to change the multiplier. You will never get anywhere near 133MHz fsb with that mobo.

 

[Dark4ng3l]

<< What why wouldnt it work at 133? Its a KT*133* chipset!! >>



Yes but that only means you can run the memory at 133 buy selecting fsb+pci bus speed. You need a kt133a to run your fsb at 266(133 DDR)

 

[Syndicate]

yea sorry got some lines crossed. So all the people running their 1ghz tbirds @ 133 x 7.5 are using KT133A chipsets then correct? And why tell me to do research when I asked a question? What kinda answer is that man? And the chip is already unlocked.

 

[DarkMajiq]

Syndicate: Yes, you will need a motherbaord based on the KT133A chipset to run the 133MHz FSB, the KT133 doesn't get anywhere near there. It's got nothing to do with your processor, it's a limitation of the KT133 chipset. Now, if you want to run at a faster FSB, I would suggest using multiplier only to see how far your chip will go, then going back to default multiplier, then gradually increasing the FSB until it's no longer stable, back it off a notch, then increase the multiplier a bit again so that you're close to what you had using only multiplier... i.e. if you get it to 9.5x100, then use multiplier+FSB, try something like 9x105 or 9x106