top CPU for P4B533? Asus docs are wrong.

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Tom

The docs on the ASUS website are wrong. (if I look it up by MB I get different info than if I look it up by CPU.)

What is the fastest CPU that I can use with my P4B533? Can I use a P4c (800MHz bus) CPU?

I'd like to upgrade my Celeron 1.7 to a P4c 2.6 with HT. I'm not interested in overclocking or doing anything out of spec.

My chipset is Intel i845E rev. E0
Will it be a problem using my RAM with a P4c? My RAM specs are listed below.

Thanks,
Tom.

DRAM Type DDR-SDRAM
DRAM Size 512 MBytes
DRAM Frequency 134.7 MHz
FSB:DRAM 3:4
CAS# Latency 2.5 clocks
RAS# to CAS# 3 clocks
RAS# Precharge 3 clocks
Cycle Time (TRAS) 6 clocks
Module 0 Xerox DDR-SDRAM PC2700 - 256 MBytes
Module 1 DDR-SDRAM PC2700 - 256 MBytes
 
What is the fastest CPU that I can use with my P4B533? Can I use a P4c
(800MHz bus) CPU?

You'd be limited to however high FSB your board and ram could manage, and I
doubt it would make it to 200 but you can try.
I'd like to upgrade my Celeron 1.7 to a P4c 2.6 with HT. I'm not
Click to expand...
interested in overclocking or doing anything out of spec.

To use HT you need a board which supports HT, and that one doesn't.
 
i had the same issue... i just bought a 2.6 533mhz processor. The board does
support HT (with a bios upgrade), but like Darkfalz said, you need to run
the board at 200mhz and i don't think the ram will hack that, but i haven't
tried.

Although on my p4b533-e board there is an option where you can tell the AGP
and RAM to be 66mhz/33mhz and you can adjust those independently of the FSB.
I didn't have the cash to get a p4c 2.6 incase it didn't work... so just
went with the vanilla version
 
You can run the RAM at 3:4. So, if the FSB was 200 the RAM would be at 150.
There's plenty of RAM that can handle that.

As you say, the board definitely supports HT.

I suspect the max stable FSB would be around 166, but I'd love to hear
otherwise.

So, if you underclocked a 2.6Ghz 200FSB cpu to 2.158Ghz (166 FSB) you might
have success.
 
800 MHz FSB is not officially supported - you may be able to do it, but with
an overclocked RAM and AGP bus.

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The docs on the ASUS website are wrong. (if I look it up by MB I get
different info than if I look it up by CPU.)

What is the fastest CPU that I can use with my P4B533? Can I use a P4c
(800MHz bus) CPU?

I'd like to upgrade my Celeron 1.7 to a P4c 2.6 with HT. I'm not interested
in overclocking or doing anything out of spec.

My chipset is Intel i845E rev. E0
Will it be a problem using my RAM with a P4c? My RAM specs are listed
below.

Thanks,
Tom.

DRAM Type DDR-SDRAM
DRAM Size 512 MBytes
DRAM Frequency 134.7 MHz
FSB:DRAM 3:4
CAS# Latency 2.5 clocks
RAS# to CAS# 3 clocks
RAS# Precharge 3 clocks
Cycle Time (TRAS) 6 clocks
Module 0 Xerox DDR-SDRAM PC2700 - 256 MBytes
Module 1 DDR-SDRAM PC2700 - 256 MBytes
 
You can lock the AGP bus at 66mhz and the PCI bus at 33mhz in the bios. So
they'll be running at standard speed.
 
If you have good RAM (eg. Corsair PC3200) the only thing you'll be
overclocking is the motherboard. RAM will be within spec using 3:4 ratio.
AGP and PCI buses are locked in bios to standard settings. Processor will be
"under clocked".


Thanks. I'm not into overclocking, so I will stick with a P4B 533 CPU.

Tom.
 
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