How did they get 2.8ghz 533fsb northwoods to run at that speed?

[Maximilian]

In another thread the OP was asking about a prescott and a northwood, turns out the 2.8 is a 533mhz model. How the heck did they make it run at 2.8ghz?

533 times what = 2800?

The multiplier would have to be around 5.26, even then its not exact, its 3.58 mhz off. I dont think you can get multipliers with two decimal places anyways, can you?

Explain this cpu please

 

[Ayah]

The multiplier was 21. It's quad pumped from 133.

 

[Arkaign]

Originally posted by: Ayah
The multiplier was 21. It's quad pumped from 133.

Correct, all P4/PD multipliers are for the native bus, before it's quad-pumped.

IE :

1.4Ghz P4 Willamette = 100FSBx4=400, 14x Multi
2.4B P4 Northwood = 133FSBx4=533, 18x Multi

etc.

 

[Stumps]

Yep, that's pretty much correct.

My 3.06ghz Northwood runs at 23x133 for it's 3.06ghz clockspeed.

I have it running at 23x151 to get 3.45ghz using stock cooling and stock voltage....I'm sure it could go higher...I did have it running at 3.6ghz at one stage with water cooling as an experiment...but I'm happy with how it is now.