mobo/cpu FSB compatibility

[fenriswolfr]

If a cpu has FSB @ 2000 mhz would you also want the mobo @ 2000 mhz? Say if you got a mobo with 1000 mhz FSB would this make the 2000 mhz CPU FSB basically 1000?

[kenc51]

If a cpu has FSB @ 2000 mhz would you also want the mobo @ 2000 mhz? Say if you got a mobo with 1000 mhz FSB would this make the 2000 mhz CPU FSB basically 1000?

The FSB is actually 200MHz.......it works out as 5x200 = 1000
Where did you see 2000MHz??

A CPU uses what's called a multiplier......
Say your cpu does 2GHz (2000MHz), your ram runs @ 200MHz (400MHz DDR -> double data rate) and that cpu would have a multi of 10x

ie. 200x10=2000 or 2GHz
The CPU connects to the Ram, GFX etc using whats called the Hypertransport bus. This bus runs @ 1000MHz or 200MHz with a multi of 5x (5x200=1GHz)
AMD use this single HT bus to communicate with everything on the motherbooard, the high-end opteron server chips can also have more than one HT bus, used to communicate with other cpus on the mobo.
All cpus use multipliers to get their speed....usually with a base freuency of 100,133,166,200 or 266MHz as their base frequency. (AMD64 uses 200MHz)
The basic way to overclock is to increase this base frequency.
This CPUZ screenshot should help to expain. notice the multi and HTT?
I've changed the HTT from 200 to 280 to get 2.8GHz

Sadly that chip is no longer with us

Mayby sosmeone else can explain thiis better

[fenriswolfr]

Here's the cpu link
http://www.tigerdirect.com/applications ... No=2207247 CPU @2000 mhz FSB
http://legitreviews.shopping.com/xPO-Gi ... _M59SLI_S5
Mobo @ 2000 mhz


they both say FSB @ 2000 mhz?

[kenc51]

Ahh it's AM2, sorry.....

That means DDR2 ram @ 400MHz instead of DDR1 @ 200MHz

Or 400 using a multi of 5x = 2HGz

ALL AM2 cpus run @ this speed........but dont be fooled by this marketting!

You and get any AM2 cpu and it will run @ full speed on and AM2 board......

[fenriswolfr]

so any am2 cpu will run full with any am2 compatible mobo?

[kenc51]

so any am2 cpu will run full with any am2 compatible mobo?

Yep

[fenriswolfr]

alright, thanks a lot, most people didn't seem to be able to really answer this question, it had me quite confused

[kenc51]

alright, thanks a lot, most people didn't seem to be able to really answer this question, it had me quite confused

NP
My previous posts might not have helped your understanding either LOL

[AgentJ]

I was actually curious about this too... I thought you could run any AM2 processor on a AM2 mobo without a problem... but its good to know I was correct.