P4 1,8a Sl6e6

[aspe]

I must have missed something:
- SL6LA is a 400 MHz
- SL6E6 is a 533 Mhz - why doesn´t everyone talk about this one?
Isn´t that a big difference conc. oc potential?

[jmsandrsn]

There's not a 533 MHz FSB P4 1.8
Your source of info must be incorrect.

[aspe]

This is from Intel Processor Spec Finder:
Intel (http://processorfinder.intel.com/scripts/details.asp?sSpec=SL6E6&ProcFam=483&PkgType=ALL&SysBusSpd=ALL&CorSpd=5271)

[jdmcnudgent]

Originally posted by aspe
This is from Intel Processor Spec Finder:
Intel (http://processorfinder.intel.com/scripts/details.asp?sSpec=SL6E6&ProcFam=483&PkgType=ALL&SysBusSpd=ALL&CorSpd=5271) hmm, thats odd.:eh?:

[G4VRO]

It says at the bottom:
This processor uses a physical signaling scheme of quad pumping the data transfers over a 100 MHz clocked system bus and a buffering scheme allowing for sustained 400 MHz data transfers.
The 533 number on top is a mistake, I guess.

But what about VCore being 1.525? Thought it was 1.5

[FIZZ3]

Originally posted by G4VRO
It says at the bottom:

The 533 number on top is a mistake, I guess.

But what about VCore being 1.525? Thought it was 1.5

It's a mistake I think. The 1.525v VCore is normal for a C1 stepping CPU.

[aspe]

Seems that Coz was aware of this one - one (http://forum.oc-forums.com/vb/showthread.php?s=&threadid=144061&highlight=sl6e6) - though 533 MHz wasn´t mentioned.
Is it really a mistake ...
What would it mean if ...it´s a 533 compared to a 400?
Would it have better potential?

[NookieN]

A 1.8 with 533 bus would require a 13.5 multiplier. And there are no half multipliers on the P4s.

The performance wouldn't be appreciably better. Especially if you're going to OC it to 2.4+ and run with a 533+ bus anyways.

[FIZZ3]

Originally posted by NookieN
A 1.8 with 533 bus would require a 13.5 multiplier. And there are no half multipliers on the P4s.

The performance wouldn't be appreciably better. Especially if you're going to OC it to 2.4+ and run with a 533+ bus anyways.

In theory, comparing two cpu's with identical clockspeed but different FSB speeds like 100 vs 133 would yield that the 133 version is substantially faster in the order of magnitude of 5 to 10%... all at the same cpu speed.

If there were no overclocking boundaries and we would increase the FSB by the same %, the 133 version would keep it's advantage in this realm too.

[NookieN]

Originally posted by FIZZ3

In theory, comparing two cpu's with identical clockspeed but different FSB speeds like 100 vs 133 would yield that the 133 version is substantially faster in the order of magnitude of 5 to 10%... all at the same cpu speed.


That's certainly the conventional wisdom. But with the asynchronous memory bus on P4 boards it isn't necessarily true. If you compare DDR333 with a 400Mhz fsb chip to it on a 533Mhz fsb chip, the chips will perform almost exactly the same. Of course, if you run pc1066 rdram the 533Mhz fsb chip will have an advantage.