Thunderbird 1Ghz in 266mhz or 200mhz flavor?

[mschuch]

I've read that the Thunderbird 1Ghz can be run at either 10x100 or 7.5x133. Is this true? If it is, is there ANY reason I shouldn't buy one at the current 200mhz bus and just run it at 7.5x133.

I don't like to overclock so I'm not considering the Thunderbird 750.

I am planning on running a system based on the new Via KT133a chipset to take advantage of the 266mhz.

Thanks in advance -

[Barney]

I guess it could be possible with the new KT133A chipset,but it would be overclocking.The chip is meant to run at 10x100 (or 5x200,whatever you want).

Ronald

[NDD]

First of all : Barney/Ronald - you're wrong. Running 266 MHz FSB T-Bird is not overclockers' dream, there're actually Thunderbirds running 266 MHz FSB, which is 133 DDR EV6 bus, and they're 1 GHz, 1.1 GHz and 1.2 GHz, and in this configuration processor really run at 133x7.5 (1 GHz)

Mschuch : take a look at this http://www.xbitlabs.com/cpu/athlon-1200.html , you may found all the answers you seek ...

Best Regards ...

[This message has been edited by ND (edited 01-10-2001).]

[Barney]

I don't think so.Mschuch is talking about the 1ghz Thunderbird (200mhz one) and run it at 266,like the new ones will (that aren't out yet).

So I think his question is really:"Are the Thunderbird 1ghz at 200mhz and 266mhz FSB different?

I think the question to that is yes.Since with the current used architecture it's already quite hard to get it stable (that's why the PIII-1.13ghz is delayed for half a year or so).Just 'overclocking' the FSB would only increase possible instablility.They would have to make a new processor that's really capable of 266mhz.

Ronald

[mschuch]

Thanks guys -

I will just wait for the new Thunderbird's with the 266mhz FSB to come out. I'm not interested in trying to "unlock" the multiplier on the CPU, so I'll just wait. Hopefully they will be out by the end of the month.

I've already ordered the M/B (Epox EP-8KTA3), the hard drive (30GB Ultra/100, 7200), and memory (256mb PC133). Now just need the CPU.

Thanks again!

[AuraEdge]

I think the answer is no...

7.5x133 and 10x100 gives the same response from the CPU - 1Ghz. Its just differently translated from the FSB its derived from. The 133 Bus does not stress the CPU at all if its clock speed is set the same by adjusting the multiplier - as far as I know. I dont see why it would from my perspective. If someone could shed some light on this, It would clear things up a bit.

I think its the same way as RAM - If on a Via board at 100Mhz FSB, you run the RAM at Hostclk+PCI, you get 133Mhz out. The same 133Mhz Memory clock speed you would get if the FSB were 133Mhz in the first place. PC133 RAM doesnt care which.

AGP cards too - They take the FSB and use whatever multiplier necessary (at least on spec FSB speeds) to get 66Mhz out of it.

Same deal with, say the P3 600e vs the P3 600eb - Either can hit 600Mhz with no problem, they are just derived from a different multiplier and FSB.

I believe the P3 1.13Ghz was recalled because the P3's were difficult to produce stable at 1.13, because of the P3's archetechture. It has nothing to do with the Bus being 133Mhz. If it were a 11.0x or 11.5x and 100FSB, you would have the same problem.