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-   -   Prescott (https://www.mersenneforum.org/showthread.php?t=2743)

ET_ 2004-07-04 04:36

Prescott
 
I noticed that Pentium IV Prescott has 1 MB cache.

Did anyone benchmarked it with Prime95? Has it better performances related to "normal" Pentium IV?

Luigi

patrik 2004-07-04 07:31

No, It has worse performance. See [url=http://www.mersenneforum.org/showpost.php?p=34137&postcount=10]this[/url] post and the threads [URL=http://www.mersenneforum.org/showthread.php?t=2188]Upgrading to prescott[/URL] and [URL=http://www.mersenneforum.org/showthread.php?t=2036]P4 Prescott - 31 Stage Pipeline ? Bad news for Prime95?[/URL].

But I can't find an actual Prime95 benchmark.

ET_ 2004-07-04 08:17

[QUOTE=patrik]No, It has worse performance. See [url=http://www.mersenneforum.org/showpost.php?p=34137&postcount=10]this[/url] post and the threads [URL=http://www.mersenneforum.org/showthread.php?t=2188]Upgrading to prescott[/URL] and [URL=http://www.mersenneforum.org/showthread.php?t=2036]P4 Prescott - 31 Stage Pipeline ? Bad news for Prime95?[/URL].

But I can't find an actual Prime95 benchmark.[/QUOTE]

Thank you Patrick, I forgot those threads because at that time I was not interested in it :ermm:

I think I will buy an "old style" Pentium IV 3.2 GHz... unless George has news about it.

Luigi

E_tron 2004-07-04 18:52

[QUOTE=patrik]No, It has worse performance.[/QUOTE]

I second that.

ColdFury 2004-07-05 04:57

While the cache is bigger, apparently the latency is worse.

optim 2004-07-05 07:57

I read somewhere that Intel favours big slow caches (bigger size in KB, but higher latency). Very bad IMO.

ColdFury 2004-07-06 02:38

[QUOTE=optim]I read somewhere that Intel favours big slow caches (bigger size in KB, but higher latency). Very bad IMO.[/QUOTE]

Not really. AMD and Intel's caches have almost always been the same size and have comparable latency.

I suspect the reason why the Prescott latency is higher is because of circuit issues.


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