How do i change the P4 Multiplier ?

[phpdog]

Hi ,

I just bought a Lan Party 875PRO ... Im running an Intel Pentium 4 2.0a in it .

I had this chip in another motherboard "Jetway ??? " I cant remember the exact name.

Anyway i could change the multiplier with that board and change the FSB .

Now the LanParty 875PRO will only let me change the FSB from 100 MHz 10 132 MHz . It wont let me touch the Multiplier , even though the option is there its just not turned on .

I asked DFI about this and they told me what i already know ... the board is a 800 FSB Canterwood.

the CPU is running at 20 x 100 = 2000 MHz or 2.0 GHzI would like to try and run it at 10 x 200 MHz = 2000 MHz or 2.0 GHz or as high as i can get it ... Jetway motherboard had it running at 13 x 180 @ 2700 MHz or 2,7 GHz.

Is there anyway to change this setup ... or do i need to just buy a P4 2.4c 800 FSB chip ?

The only reason i bought this board was because i had the P4 2.0a lying in the house doing nuthing

 

[DivideBYZero]

You can't. ALL P4's are locked.

I don't know what you thought you were doing with the previous set up, but I can guarantee you were not changing the multiplier.

 

[lenjack]

What he said...multipliers on p4's cannot be changed.

 

[phpdog]

hmm

so what was it i was changing ... the settings were like

100 FSB and then below that there was an option with 5 diffent settings they went something like ...

3/100 4/100 5/100 dividers or something anyway it was changing the way the FSB was split up.

I dont know anything about Intel CPU's thats why im asking this ... Ive been AMD with every PC ive ever had

 

[FPSguy]

Originally posted by: phpdog
hmm so what was it i was changing ... the settings were like 100 FSB and then below that there was an option with 5 diffent settings they went something like ... 3/100 4/100 5/100 dividers or something anyway it was changing the way the FSB was split up. I dont know anything about Intel CPU's thats why im asking this ... Ive been AMD with every PC ive ever had

Those ratios don't look right, but it's a good bet you were changing either the ratio between the memory and the FSB, or else the ratio between the PCI/AGP buses and the FSB.

 

[phpdog]

hi ,

Yeah i couldnt remember exactly what the correct ones were i sold the board over a year ago

 

[Mingon]

You can't. ALL P4's are locked

Not 100% accurate. all desktop P4's currently are multiplier locked. P4 Xeons can have lower multipliers used and rumours suggest the p4 EE might be unlocked.

 

[tinker]

ok i give what is the p4 EE???

i have a p4m processor and it has the ability to swith between 12 and 16 multiplier but cant get it to do that in a desktop motherboard.. stays at 12 x all the time .

so no one has figured out the mystery of the p4 multiplier lock...

lets call scooby doo!

with all the amd multiplier unlock scheme's i thought for sure that someone would have figured out how to do it by now

ok well good luck to all then..

 

[Mingon]

The P4 EE (extreme edition or emergency edition / expensive edition) is the P4 xeon with 1mb lvl 3 cache converted to use on socket 478 motherboards at 800mhz fsb (versus 533 for Xeon). It was introduced due to problems with intel having no processor that could beat the 2.2ghz opteron as the prescott cpu is not quite ready.

 

[DerwenArtos12]

Originally posted by: Mingon
The P4 EE (extreme edition or emergency edition / expensive edition) is the P4 xeon with 1mb lvl 3 cache converted to use on socket 478 motherboards at 800mhz fsb (versus 533 for Xeon). It was introduced due to problems with intel having no processor that could beat the 2.2ghz opteron as the prescott cpu is not quite ready.

They could not compete with the 2.2ghz Athlon 64 FX-1. and the prescott is not even close to being ready.

 

[Matthias99]

with all the amd multiplier unlock scheme's i thought for sure that someone would have figured out how to do it by now

It's not the same thing at *all* -- the Athlon XP line of CPUs has no integrated heat spreader, so you can mess around with some of the FSB circuitry physically. You'd have to physically disassemble the P4, and I doubt there's any way to do that without cracking the ceramic casing of the chip (and ruining the core). Opteron/AMD64 chips can't be modded either, but then again everything AMD since the Barton 2500+ is also unlocked by default.

 

[Wingznut]

Originally posted by: DerwenArtos12

Originally posted by: Mingon
The P4 EE (extreme edition or emergency edition / expensive edition) is the P4 xeon with 1mb lvl 3 cache converted to use on socket 478 motherboards at 800mhz fsb (versus 533 for Xeon). It was introduced due to problems with intel having no processor that could beat the 2.2ghz opteron as the prescott cpu is not quite ready.

They could not compete with the 2.2ghz Athlon 64 FX-1. and the prescott is not even close to being ready.

The P4 Extreme Edition has 2mb of L3 cache.

And what makes you think that Prescott is "not even close to being ready"?

 

[MDE]

The only P4s that I know of that definately do have unlocked multipliers are engineering samples, which are extremely hard to get ahold of.

 

[jiffylube1024]

Originally posted by: MonkeyDriveExpress
The only P4s that I know of that definately do have unlocked multipliers are engineering samples, which are extremely hard to get ahold of.

Yeah, pretty much impossible if you're not a hardware review site or whatnot. They don't give those things away...

 

[rgreen83]

I see the engeneering samples pop up on ebay every-so-often but who knows if they are legit.

 

[Nebor]

Originally posted by: Wingznut

Originally posted by: DerwenArtos12

Originally posted by: Mingon
The P4 EE (extreme edition or emergency edition / expensive edition) is the P4 xeon with 1mb lvl 3 cache converted to use on socket 478 motherboards at 800mhz fsb (versus 533 for Xeon). It was introduced due to problems with intel having no processor that could beat the 2.2ghz opteron as the prescott cpu is not quite ready.

They could not compete with the 2.2ghz Athlon 64 FX-1. and the prescott is not even close to being ready.

The P4 Extreme Edition has 2mb of L3 cache.

And what makes you think that Prescott is "not even close to being ready"?

He's on the inside, obviously. Otherwise he wouldn't claim to know.

 

[Wingznut]

Originally posted by: jiffylube1024

Originally posted by: MonkeyDriveExpress
The only P4s that I know of that definately do have unlocked multipliers are engineering samples, which are extremely hard to get ahold of.

Yeah, pretty much impossible if you're not a hardware review site or whatnot. They don't give those things away...

They gave one away to me.

(I guess I fall under the "whatnot" catagory. )

 

[User1001]

Just curious but when intel sells a cpu with a higher multiplier, do they make any modifications?

 

[Wingznut]

Originally posted by: User1001
Just curious but when intel sells a cpu with a higher multiplier, do they make any modifications?

I'm not sure what you mean by that.

 

[Snooper]

You can change the multiplier of the P4. You just have to have access to the raw core and to a multi million dollar tester/programmer to do it. The frequency of a P4 is set inside the core. It completely ignores the multiplier pins from the MB. I have seen MB that you could "change" the CPU multiplier and then it would say you had XXX P4 that it calculated by multiplying the bus speed by the multiplier. Of course, that didn't change the CPU speed one bit, it just had the BIOS tell you you had a different CPU than you really had.

As for higher speed/multiplier CPUs being different than the slower ones, it depends. Within a given CPU family and stepping, the die are all the same. Some are just faster than others due to minute variations between the die. The ones that test out at the fastest speed and show they can do it reliably, get packaged with the faster multiplier/and or bus speed. The slower ones get the slower multiplier/and or bus speed, or if they are too slow for market demands, they get the old key chain route.

The processors (and pretty much all ICs for that matter) are constantly being improved on. Either through changes to the existing manufacturing process to make the average die faster, or they redesign parts of it and rev the "stepping" (either a minor rev or a major rev) which usually involves new litho masks at a few or a lot of steps. As these changes are implimented, the average die on the wafer gets better and better. Eventually, the yeilds get good enough that the company can market a faster speed bin (and charge a premium for it of course!). Usually, this also means that almost all the functioning die are fast enough that the lowest speed bin will be dropped soon after adding a faster speed bin. Not always, but usually.

If making fast CPUs was as easy as some folks thing, we would all be using 100 Tera Hz computers with 1000 cores all packaged smaller than a grain of rice and being powered solely by the static electricy of the operator touching the key board. Oh wait. That would be powered by the nerve impulses from the direct nureal interface...