Thunderbird question.

[Wing627]

I've been toying with my 1.2 Tbird for about 6 months now, overclocking it and doing everything i can to get every bit of speed out of it. I've been able to get to 1450 easily, but only with a multiplier of 10. Every time I try to go over 10 on the multiplier, it's unstable. This is on a ABIT KT7A-RAID... Is there some good reason I don't know about why I can't run stable with a multiplier over 10?

 

[mindiris]

Many reasons. Cooling, CPU voltage needs to be raised, or you just plain hit the limit your core can handle.

 

[MilkPowderR]

<< I've been toying with my 1.2 Tbird for about 6 months now, overclocking it and doing everything i can to get every bit of speed out of it. I've been able to get to 1450 easily, but only with a multiplier of 10. Every time I try to go over 10 on the multiplier, it's unstable. This is on a ABIT KT7A-RAID... Is there some good reason I don't know about why I can't run stable with a multiplier over 10? >>



mindiris is right.

I assume you lowered the FSB when you upped the multiplier, am i right?
As you increase the multiplier on the CPU, the CPU runs a lot more intensively than increasing the FSB. FSB increases the speed and give stress on overall system components including CPU but the CPU won't be stressed as much as increasing the multiplier. And as you need to increase the voltage for the CPU, it gets even hotter. You would need some very good cooling for your CPU if you're going to increase the CPU multiplier. This also explains that if you run the Sisoft Sandra CPU benchmark, you'll get considerably higher score with a higher clock multiplier with less FSB than the lower clock multiplier with higher FSB (assume them both systems have same 1Ghz for example)

 

[Wind]

Generally the 1.2 Ghz have around 1450 to 1550 Mhz as a limit. Most probably u have hit the limit w/ teh current setup. If u really wan to up the mmultiplier, u have to lower down ur FSB. FSB increment generally improve overall system performance than upping the multiplier. From wht i c, u already have a nice O/Cing. Maybe u can try 9.5 X 153 FSB.