top CPU for P4B533? Asus docs are wrong.

[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
FSBRAM 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

 

[Darkfalz]

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

interested in overclocking or doing anything out of spec.

To use HT you need a board which supports HT, and that one doesn't.

 

[GiJO]

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

 

[John]

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.

 

[GiJO]

what about the AGP and PCI bus though? what would they be running at?

 

[Robert Hancock]

800 MHz FSB is not officially supported - you may be able to do it, but with
an overclocked RAM and AGP bus.

--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from (e-mail address removed)
Home Page: http://www.roberthancock.com/


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
FSBRAM 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

 

[Tom]

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

Tom.

 

[John]

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.

 

[John]

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.