why does my xp2000 tbred show up @1250mhz?

[groovin]

I was under the impression that these athlon xp 2000 tbreds were clocked at 1.67 ghz. Actually, the sticker on the case says 1.67. is my bios just misreporting this?
I am running this thing on a MSI KT333 board.

 

[Megatomic]

Your front side bus is set to 100MHz in the BIOS groovin. Go into the BIOS setup and select 133MHz FSB and you'll be all set.

 

[groovin]

that did the trick, thanks. i thought tbreds are 266 fsb, how come i can only set it to 133?

 

[SpocksBrain]

That's the magic of DDR, that...

(133 x2)

Regards,

SB

 

[ChampionAtTufshop]

Originally posted by: groovin
that did the trick, thanks. i thought tbreds are 266 fsb, how come i can only set it to 133?

its a 266MHz Front Side Bus, not CPU Operating Frequency

for AMD, its CPU Operating Frequency X2 to get Front Side Bus (so 133 X2 = 266MHz)

 

[Chumpman]

Hey you're only the 20421424th person this hour to ask this question.

 

[Janitah]

Because that is AMD's tricky way of labeling processors

 

[NesuD]

That is because while the processor is clocked on a 133 bus the EV6 bus that is Used by the Athlons is double pumped or ddr whicever term you prefer similar to the p4s quad pumped bus example 400mhzbus p4 quad pumped 100x4=400mhz 533bus p4 quad pumped 133x4=533 800mhzbus p4 quad pumped 200x4=800 Athlon xp 266 is 2x133=266 double pumped xp 333 is 2x166=333 again double pumped and the upcoming 400 bartons will be 2x200=400 again double pumped. Guess amd isn't the only one with a "tricky way" of labeling processors are they janitah.

 

[groovin]

wow, i was fooled. but hey, as long as its fast... im happy. does that mean these processors dont function off of a "true" 266 or 400 fsb?

 

[Megatomic]

groovin, do you have any training in electronics by any chance? If you do, in a ddr system, transactions occur on both the leading and trailing edges of the clock pulses instead of one or the other. So for every timing clock pulse you get two operations rather than one. Hence ddr (double data rate).

If you haven't had any training, I hope that didn't confuse you.

 

[NesuD]

Originally posted by: groovin
wow, i was fooled. but hey, as long as its fast... im happy. does that mean these processors dont function off of a "true" 266 or 400 fsb?

Depends on the definition of a true fsb. As Megatomic said what DDR does is allow 2 transactions per clock cycle rather than one. think of it like this. Each clock cycle is like a heartbeat picture a heart moniter that displays the rising an falling line on its graph. each clock is 1 beat of the heart. In the past data was transferred on the rising side of that beat. what DDR or double pumping does is allow data to also be transferred again on the falling side of that beat thus doubling the theoretical data rate. The Athlon has always been able to do this between the cpu and the northbridge but the memory was limited to single data rate(transferring on the rising side only). I'm sure you can see how this could limit the Athlons potential. Now since the arrival of DDR ram and DDR capable chipsets that bottle neck caused by the ram is greatly diminished allowing the Athlon to more fully utilize it's potential. hope this helps clear things up for you.

 

[groovin]

electronics training? some stuff i learned in college years ago that i cant really remember anymore. haha

no, nothing confusing about what you said... it all makes sense. thanks for the clear up guys.

 

[Megatomic]

Originally posted by: groovin
electronics training? some stuff i learned in college years ago that i cant really remember anymore. haha

no, nothing confusing about what you said... it all makes sense. thanks for the clear up guys.

Glad to help groovin. Enjoying that new system?

 

[groovin]

yes i am megatomic. much better than the duron i was running!