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CPU fsb exact effect

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hello guys


i just want to ask you about the effect of cpu fsb.
example man:

i have a cpu with 1066fsb,
and a mother board with 1333 fsb
and in the first boot in the screen


it says that 266*10 = 2.6ghz, my question here man is,,


"what is the effect here of the cpu fsb, the 1066?"
" can you guys tell me here the exact thing that effect of the 1066 fsb
or the thing that prove the effect of the 1066 cpu fsb?"

thanks guys

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Testgamma1 wrote :

hello guys


i just want to ask you about the effect of cpu fsb.
example man:

i have a cpu with 1066fsb,
and a mother board with 1333 fsb
and in the first boot in the screen


it says that 266*10 = 2.6ghz, my question here man is,,


"what is the effect here of the cpu fsb, the 1066?"
" can you guys tell me here the exact thing that effect of the 1066 fsb
or the thing that prove the effect of the 1066 cpu fsb?"

thanks guys



Don't bother with existential questions in a hardware forum. 266.666 (continuous) x 4 is 1066.666 (continous). The CPU runs at 266 MHz clock speed with Quad Data Rate technology enabling four 64-bit transfers per clock cycle. Quad means four, so its 4x 266 MHz.

Reply to Crashman
- 0 +

You have the FrontSide Bus - a group of printed circuit board traces carrying data into and out of the CPU.

You have the FSB frequency which describes how fast it is - stock: generally 200, 266, 333, or 400 MHz. Also FSB times CPU internal multiplier = CPU core speed. (AMD CPU's and i7's do things a little differently.)

All other things being equal (and they seldom are), a higher FSB gets data into and out of a CPU faster than a lower FSB.
The FSB operates with Quad Data Rate technology (informally : "quad-pumped" ), transferring 4 chunks of data each cycle (266 X 4 = 1066, 333 X 4 = 1333).

The motherboard is programmed for a specific FSB by pins on the CPU. So a 1333 MHz. motherboard can use a CPU with a 333 MHz. FSB. Generally, a 1333 MHz. motherboard is backwards compatible with 800 and 1066 MHz. CPU's, assuming, of course, that the technology is compatible.



And the motherboard supporting 1333 MHz

Reply to jsc

jsc wrote :

You have the FrontSide Bus - a group of printed circuit board traces carrying data into and out of the CPU.

You have the FSB frequency which describes how fast it is - stock: generally 200, 266, 333, or 400 MHz. Also FSB times CPU internal multiplier = CPU core speed. (AMD CPU's and i7's do things a little differently.)

All other things being equal (and they seldom are), a higher FSB gets data into and out of a CPU faster than a lower FSB.
The FSB operates with Quad Data Rate technology (informally : "quad-pumped" ), transferring 4 chunks of data each cycle (266 X 4 = 1066, 333 X 4 = 1333).

The motherboard is programmed for a specific FSB by pins on the CPU. So a 1333 MHz. motherboard can use a CPU with a 333 MHz. FSB. Generally, a 1333 MHz. motherboard is backwards compatible with 800 and 1066 MHz. CPU's, assuming, of course, that the technology is compatible.



And the motherboard supporting 1333 MHz




oh i see, so you mean that if i overclock the cpu, i cannot go further than the 333 motherboard fsb because 333 is the limmit?(effectively by 333*4)

and it also means that if i get the cpu to 333, theres nothing to do but to add the multiplier to overclock more?


i hope im right,.

Reply to Testgamma1

You want to know the effect and also what proves the effect? Man, like Crashman says, we'll be talking in circles here.

The simplest answer is this. A 1333 FSB has the effect of running 25% faster than a 1066 FSB. A thing that can prove this effect can be found in CPU benchmarks.

Reply to HundredIslandsBoy

Bingo :P well done.

although when a MB say max FSB 1333 u can normally push it a lil further its just like the CPU, it may say 3 ghz but u can take it to 3.6 so ur motherbaord wont sstop dead on 1333 may get to 1400 1500 u never know till u try :P though if u hit this point u may need to reset the jumpers on the motherbaord to take it back to default speeds. unles u have a cleaver baord that can work out u craped up the overclock but either way its no big deal if u do.

and yeah the multiplier would then be the only other way to clock further that is of course that the CPU isnt getting to hot :P

thats why intel charges so much for its "extreme" branded CPU's they simply have an unlocked multiplier so u can hit high speeds with no need to up the FSB to crazy levels. :D

------------------------------ Q6600 @ 3Ghz
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Reply to mildiner86

Testgamma1 wrote :

oh i see, so you mean that if i overclock the cpu, i cannot go further than the 333 motherboard fsb because 333 is the limmit?(effectively by 333*4)

and it also means that if i get the cpu to 333, theres nothing to do but to add the multiplier to overclock more?


i hope im right,.



No, it has nothing to do with overclocking. The chipset is specified to support up to FSB-1333 processors. Depending on how good the board is, it will probably run between 400 and 500 MHz (FSB-1600 to FSB-2000) for its highest overclock.

Reply to Crashman

sorry for that guys, actually, i got mine in 2.1 to 2.9 stable with stock fan,

im just curious about those things that i know i dont really need to know,...

hehehehe,, sorry for that again,,,

Reply to Testgamma1
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