tyan trinity 400 and cII 566 cant get over 638mhz(75mhz x 8,5)

[jimy17]

I really dont know how i can get over 638mhz and up to 850.
please help me.

system:
Tyan trinity 400
cII 566
Elsa Erazor X
64MB PC100
IBM 371010 (10GB)
Fujitsu MPD (8,4GB)

 

[blackhawk]

Try here for some insites with overclocking this mb.

http://www.homeweb.org.uk/s1854/

Its a fine mb, very stable and well built but not very overclockable as it autodetects the chip freq for the pci,agp dividers.

It's possible to overclock if you have a slotkit for the slot 1 that has jumpers to manually select the fsb for the mb, thereby bypassing the autodetect off the chip. My attempt with an asus slotkit was unsuccessful with my c2-533 but I changed to an ax6bc and my 533 runs fine at 896 right now.

It's also possible that the chip just wont do more but that would be an exception for that one.

 

[they call mr big]

blackhawk - how far could you get with your c2 533 before you changed over motherboards

 

[blackhawk]

My problem was the slot kit. You can't oc in the socket. You have to use a slot kit with jumpers to force the mb to see it as a 100mz coppermine. The asus slot kit wouldn't work. Others have had success with Iwill and MSI I think but not positive.

The only way to oc is with a slot kit in the slot 1 that has a jumper to force the mb to see it as a coppermine 100mz fsb chip.

All I would probably be able to do is 75 or maybe 83 mz before my video was too far out of spec. I only tried it in the slot with the asus slotkit.

 

[jimy17]

Ive got a MSI 6905 slot kit, but nothing happens again.
may be the Vcore is to low ( but I dont know a program that can show me the vcore in windows). the bios did not show me.
everytime i try 83 mhz, 95,100, the screen became blanc, and I have to clear the cmos and start again.

 

[birddog]

Your particular board may not overclock well. I've worked with 4 different Trinity 400 boards. The last one I worked on would not overclock no matter what I did. THe other 3 would overclock to various degrees. I had 3 different CPU's that I knew would overclock on other boards (including other Trinity 400's) & none of them would post at anything other than the 'stock' speed. This board was a RMA replacement for one that was 'dead on arrivial'. Tyan may have had a batch of boards that just won't overclock. THe board ran super stable, it just would not overclock.