Could a PIII 533 or 600 EB run on a 266 mhz FSB

[Death]

I am thinking of picking up a motherboard that runs the DDR memory(266 mhz). I am wondering if it is possible for the PIII EB series that already runs at 133 mhz to run at 266 mhz. Effectively that would make a 533 mhz run at 1066 mhz.
I have seen many ppl get their 533's to 1066 but don't know if the PIII can handle the 266 mhz fsb.
The motherboard would be either a Epox or a Gigabyte board. They both make boards for the socket 370.

Please post your thought even if you have any info.

[got_yogurt]

The DDR on a DDR PIII board will not change the FSB of the processor, it just changes the memory speed. DDR for a PIII system isn't worth it anyways, the P3 cant take advantage of it.

[Death]

You can change the fsb of the PIII's. That is how you overclock them.

For instance a Celeron 366 = 66 mhz fsb x 5.5 multiplier. If you up the fsb to 100 mhz you overclock it to 550. The same would be true with the DDR memory.

Take a PIII 533 = 133 mhz fsb x 4.0 multiplier and up the fsb to 266 and it is overclocked to 1066.

I know that the fsb is one of the biggest bottlenecks of a system so a higher fsb means better performance. I would go with an athlon that has the fsb of 266 but the lowest speed I can find is around 1 ghz and it costs like $150+. Also the motherboards for the athlon are generally more expensive. The PIII 600 EB which has the 133 fsb is only $92. I could theoretically get it to 1200.

I have seen where some ppl have gotten the PIII 533 EB to a fsb of 155 mhz but I want to know if I could get it as high as 266. Could someone tell me if they have heard of it or done it them selves.

[[OC]_SR20DE]

Death (Apr 19, 2001 10:21 p.m.):
You can change the fsb of the PIII's. That is how you overclock them.

For instance a Celeron 366 = 66 mhz fsb x 5.5 multiplier. If you up the fsb to 100 mhz you overclock it to 550. The same would be true with the DDR memory.

Take a PIII 533 = 133 mhz fsb x 4.0 multiplier and up the fsb to 266 and it is overclocked to 1066.

I know that the fsb is one of the biggest bottlenecks of a system so a higher fsb means better performance. I would go with an athlon that has the fsb of 266 but the lowest speed I can find is around 1 ghz and it costs like $150+. Also the motherboards for the athlon are generally more expensive. The PIII 600 EB which has the 133 fsb is only $92. I could theoretically get it to 1200.

I have seen where some ppl have gotten the PIII 533 EB to a fsb of 155 mhz but I want to know if I could get it as high as 266. Could someone tell me if they have heard of it or done it them selves.


hahaha... awww...... aww.... hahaha... This is funny post =0 sorry I didnt mean to laugh.. but seriously, it was funny. Death,.. I wish it works like that with the Celeries and P3s... but that hasn't happened and will not happen.. but I sure do like the sound of it!! =)) I would be very very happy.. ^0^

[ebola]

why would you buy ddr ram for a 533 when you could buy a 1 ghz chip for the price of the ram.

[Death]

Why do you say it will not happen???

Go to the CPU database and look at the ppl overclocking the 533 B to 794 by raising the fsb to 155.

Well the DDR memory is more efficient so that means it means more mhz for the fsb.

The real question is what is the limit for the PIII processor.

I know the limit when it comes to the clock speed is around 1000 mhz. All the PIII chips are produced with the same .18 micron process so a PIII 533 is the same design as a PIII 1000.

I also know that the Celeron II processors function at double the fsb rating. The weak link in overclocking is not the fsb. All that is required of the fsb is to get the data into the chip.

The weak link is when the chip starts to process the data. That is when a overclocked system starts to crumble.

I know the realistic limit to internal clock is somewhere around 1 ghz. I am not trying to break this barrier. I just want to get the data into the brain as fast as possible.

The real question is what is the limit of the fsb. How fast can you transfer data to and from the processor. I have seen ppl raise the fsb to 155 and top out because of the motherboard.

The motherboard I want supports the DDR memory and is designed for the PIII processor so it can be done. If it couldn't be done the board would not exist.

All I want to know is how high have you had your fsb for your PIII system???

People used to think the would was flat until someone tested that theory. I believe the real limit to the PIII is in the internal clock not the interface to the fsb.

[Death]

If you want to look at a review of one of the boards this is the url.

http://www.motherboards.org/reviewsd.html?reviewID=346&manufname=Epox&partnum=EP-3VHA&pagenum=1

The review is using a 1000 mhz processor and like I said that is my internal clock I am looking at.

As all you know at overclockers.com the 533 FCPGA chips are extremely overclockable. Some have run at double the fsb so is what I am saying so out of reach????

[Lancelot]

The DDR boards won't change anything for the CPU FSB. The CPU FSB will still be 133 or what you overclock it to. The only thing that happens with DDR-ram is that the speed from the mainboard's chipset to the ram is at double rate (266), NOT the CPU FSB !!! Basically it's like this:
[CPU <-133-> CHIPSET <-266-> DDR-SDRAM]

[Death]

I am not aware of that. Is it the same for the Athlons??? Do you have any reading I can do to educate myself on this???

[[OC]_SR20DE]

Thank you Lancelot,.. you explained to him nice n short with clarity. I thought I should wait for some of us folks to read what this guy(Death) been saying.. I would like them to read his posts and ancious to see there responses.. lol Death, I am just waiting.. Im not in the mood of joining the argument. It's an interesting argument though.. ;-)

[[OC]_SR20DE]

Death (Apr 20, 2001 01:02 a.m.):
I am not aware of that. Is it the same for the Athlons??? Do you have any reading I can do to educate myself on this???


Death, DDR RAM support is meant to work with the Athlon processors and its DDR mobo. Yes,... you do have a lot of reading and catching up to do. You need to learn more and then we'll talk because I had trouble understanding your post 1, that was just way off. ;-)

BTW, wait till Phil, MR. B, Shadow, DocClock aka, Wild Andy C., and more will step in and read your posts and they will say.. " what the hell is this?, huh??.. " =0

[Door Knob]

Death (Apr 19, 2001 08:58 p.m.):
I am thinking of picking up a motherboard that runs the DDR memory(266 mhz). I am wondering if it is possible for the PIII EB series that already runs at 133 mhz to run at 266 mhz. Effectively that would make a 533 mhz run at 1066 mhz.
I have seen many ppl get their 533's to 1066 but don't know if the PIII can handle the 266 mhz fsb.
The motherboard would be either a Epox or a Gigabyte board. They both make boards for the socket 370.

Please post your thought even if you have any info.

I think you are confused as to what the FSB is really about (no you can't run it at 266 because you have DDR Ram). Might want to due some seriose reading before you go buying anything. I suggest checking out the newbie pages on the home page for a better understanding.

[Death]

I understand how a system works.

The problem I had is with the DDR memory. I didn't realize that it is really 133mhz memory that transfers 2 times the data per clock cycle. When a memory manufacturer tells me 266 mhz that implies to me how many cycles per second the memory does. In actuallity the DDR memory is doing 133 million cycles per second but using a bigger path to get double the data flow.

Since the CPU takes the memory frequency and multiplies that by whatever, unless the frequency of the memory is higher the cpu clock will stay the same.

Now that I understand that the frequency with DDR isn't higher than with normal SDRAM I understand why you guys said it couldn' t be done.