[RC5] P4 Speed Question
Colin L. Hildinger
colin at ionet.net
Mon Jun 11 00:08:39 EDT 2001
First, understand that, by its nature, the P4 does less per clock than the P3. The P4 was optimized to satisfy the marketing department's requirement for a high MHz/GHz number, not for the best overall performance, and a 1.5GHz P4 performs worse than a 1GHz PIII on many applications, particularly x87 floating point. There are any number of very good articles on the subject of the P4's underwhelming performance, I recommend starting at the following sites:
----- Original Message -----
From: Gregory S. Hopkins
To: rc5 at lists.distributed.net
Sent: Sunday, June 10, 2001 5:41 PM
Subject: [RC5] P4 Speed Question
After unpacking my new Dell Dimension 8100 with a P4 at 1.7ghz , I was expecting a SUPER increase (at least double) over my P3 500 overclocked to 620.
However, I am quite disapointed. It seems that Dnet is not optimized for P4 or something, because the 620mhz P3 can do approx 1,677,500 keys a second, but the P4 at 1700mhz can only do approx 2,313,000 per second. This is a HUGE disapointment. Is there anything I can do to improve this, or am I stuck waiting for a new version?
Also, the P4 is supposed to have the full P3 instruction set, right (plus some). Why isnt the keys/sec nearly triple (like the mhz is)? Even if the P4 was acting like a P3, its still doing it nearly 3 times faster.
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