Using a 266mhz FSB CPU on a 200mhz Mobo- will this work?

[ripthesystem]

Basically what the title says:

I have a Soyo Mobo and was wondering if I could put a TB 1.40/266 or a TB 1.33/266 in and have it work without problems since the motherboard says '200 MHz System Interface Speed'.

thanks
ripthesystem

 

[xfactordomine]

It should work, but your rig will be limited to a 200Mhz FSB. Pretty much same scenario as using PC133 RAM in PC100 slots.

-X

 

[ripthesystem]

I figured that would be the case- any stability issues running it like that?

thx
ripthesystem

 

[Markfw]

It will probably work, but not at the regular speed. Inless you can unlock it, it will run at 100*(whatever the old mutiplier) In other words, a 1.33 gig processor would run at 1.0 ghz (100*10)

 

[xfactordomine]

Not positive, but again I will say there shouldn't be ;P

Any reason you wouldn't get the 200FSB chips?

 

[ripthesystem]

Ok.

I think I'm starting to get it. I'm a complete multiplier n00b. So what you're saying is that a 1.33/266 will run at 1.0/200 on this mobo? does that mean that the 1.4/266 will run at 1.0/200 as well? I'm confusing myself as I type.. hmmm.

At that rate then a 1.2/200 CPU will run at stock and therefore be faster than the faster CPU? head getting stuffy.. need FAQ

ripthesystem

 

[Markfw]

OK. A 1200c = 9x133, a 1333 = 10x133, a 1400=10.5x1333, SO
A 1200c in a 100 (200 double) bus system=9x100=900
A 1333c in a 100 (200 double) bus system=10x100=1000
A 1400c in a 100 (200 double) bus system=10.5x100=1050

Clear as mud ? If you can "unlock" the cpu, I think the multiplier goes up to 12.5 on most systems which would be 1250 best.

 

[MadRat]

They do make a Duron-Morgan at 1.3GHz and a Thunderbird at 1.4GHz, both using the 100MHz/200fsb.

 

[ripthesystem]

woah! it's muddy in here
think I've gotten the general Idea. This doesn't affect the way the L2 cache is used in anyway does it?

Madrat- I know they make the 1.3-1.4/200 (Tbird and Duron) I was trying to skip the Duron because the cache seems smaller than the Tbird(am I right? if not what IS the difference?).. Which leaves the TBird but it seems to be more expensive than the 1.3-1.4/266.. which is what led me to my original question.
thx all.. I'm still learning but I'll get it eventually.

ripthesystem

 

[MadRat]

Duron-Morgan
.18-micron
SSE-enabled
64k L2 / 128k L1
hardware prefetch
100fsb

Thunderbird
.18-micron
no SSE unit
256k L2 / 128k L1
no hardware prefetch
100-133fsb

 

[ripthesystem]

Thanks for the side by side MadRat- hmmm. After reading this I've started looking at benchmark comparisons. Seems that the TBird definately has the upperhand- though not by a lot- esp in real world 2D desktop work. So is it safe to say that the Duron is like the Celeron where the TBird would be more comparible to a Pentium (x)? I guess it all comes down to the $$ spent huh? Would a Duron 'seem sluggish' as compared to a Tbird?

 

[MadRat]

I don't think the Durons seem sluggish unless its using SDRAM at 100MHz. I set my mother up running a Duron at 800MHz and PC133 at 133MHz. Her system is quiet and fast for her needs. The biggest load she puts on it is writing MP3s to audio CDs, hardly a load really. Her generic motherboard doesn't have a BIOS upgrade for the Duron-Morgan else I'd have her on that one. Wouldn't even think about the Tbird for her because the powersupply is only rated 150W.