fsb/memory ratios on p4p800 ?

NoxioN

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• Nov 30, 2003

• #1

i need to know what options for fsb and memory ratios are available on the p4p800. i know for the p4c800 there is only 400, 320, 266 which are 1:1, 5:4, and 3:2

 

Ralf Hutter

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• Nov 30, 2003

• #2

The P4P800 has the exact same ratios as the P4C800.

 

OP

NoxioN

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• Nov 30, 2003

• Thread Starter
• #3

are you sure? the p4c800 doesnt have 4:5 but the p4p does.

 

Grandpa Dan

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• Nov 30, 2003

• #4

He's correct.

 

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NoxioN

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• Nov 30, 2003

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• #5

who is?

 

klenot

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• Nov 30, 2003

• #6

The 4:5 ratio is available only with FSB from 133 to XXX MHz chipset clock. I don't know exactly the highest clock at which the 4:5 ratio can be used (I don't have Intel chipset mobo), but I know for sure, that it is unavailable at clock 200 and over.

4:5 is intended to run memory at 166 MHz (DDR333) while CPU runs at 133MHz (FSB533).

 

Grandpa Dan

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• Dec 1, 2003

• #7

Neither has 4:5 AFAIK. I'm positive my p4p800 doesn't have it.

 

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NoxioN

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• Dec 1, 2003

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• #8

my friend just said he has it. 333 on his p4p800 is giving him 4:5 cuase he is at 150fsb and ram reads 187fsb. so how is that then?
I would ask him what else it reads, but he is as sharp as a spoon.

he also said 266 gives him 1:1

 

klenot

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• Dec 1, 2003

• #9

Yes, it has 4:5 FSB:RAM divider for sure. Read this. So, up to FSB 796 (199 MHz) you can run memory faster than FSB of the CPU.

 

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NoxioN

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• Dec 1, 2003

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• #10

thank you so much Klenot

thats exactly what i was looking for.

 

Grandpa Dan

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• Dec 1, 2003

• #11

You must have a "B" series pentium? Sorry, I assumed it was a "C" series like mine. With a 800 mhz fsb cpu I don't think the 4:5 is available. I did have my fsb below 200 when I first got the board and don't recall seeing that multiplier.