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P4 533MHz FSB in a 400MHz FSB motherboard

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July 28, 2003 11:33:47 PM

Current setup:
Asus P4TE motherboard (850 chipset), P4 1.6GHz 400MHz FSB 256K cache, PC800 RDRAM.


Question:
If I am unable to get a P4 2.6GHz 400MHz FSB 512K cache because of an apparent current drought in the market, should I get:

A)P4 2.4GHz 400MHz FSB 512K cache $161
B)P4 2.66GHz 533MHz FSB 512K cache $197?

For choice B, I can set my FSB frequency to the necessary 133 in BIOS, but I don't know how well this would work with my PC800 RDRAM.
a b à CPUs
a b V Motherboard
July 29, 2003 12:42:07 AM

You can probably overclock your bus to 133MHz and underclock your memory back down to stock PC800 speed by using the PC600 setting. That's because 100x1.33=133, 600x1.33=800.

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<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>
July 29, 2003 12:58:51 AM

I have a 2.53 with PC800, it works fine.
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July 29, 2003 3:57:57 AM

Is there anything else in BIOS that I should changed besides the FSB and memory multiplier? What about the Vcore?

I like stability. Should I worry about heat or anything in any part of my motherboard or other components?
July 29, 2003 4:09:27 AM

no vcore is not necissary

So easy to fry yet tastes so good...
Silicon: The other, other, other white meat :evil: 
a b à CPUs
a b V Motherboard
July 29, 2003 4:51:50 AM

I meantioned overclocking the bus so you could use that 2.66GHz processor, this wouldn't require added voltage.

If you want to overclock your 1.6GHz Williamette core P4, you'll probably need around 1.85v to get to 2133MHz/133 bus.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>
July 29, 2003 4:53:27 AM

Oh no, I was asking about Vcore for the 2.66GHz. Thanks.
a b à CPUs
a b V Motherboard
July 29, 2003 6:27:15 AM

If you run the 2.66 at stock speed of 2.66GHz, you won't need to raise the vCore. vCore adjustment is only needed to make an overclocked CPU stable, not an overclocked motherboard.

The i850 and i850E chipsets are...the same thing. Intel simply recertified the old i850 at a higher bus speed to call it the i850E. So 133MHz shouldn't be a problem for your board, as long as you aren't overclocking the memory. And the PC600 setting will be raised to an actual PC800 speed when you overclock from 100 to 133MHz bus.

So that's it, just drop the memory speed and raise the bus speed, and a "533MHz FSB" processor will be fine.

I use the quotation marks because the actual bus speed is 133MHz, Intel inflates that number by 4 to reflect the performance increase of Quad Data Rate technology used on the P4 FSB.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>
!