Q: 64-bit PCI - 66 Mhz vs 33 Mhz networking performance?

Patrick Geoffray patrick at myri.com
Tue Jul 3 15:27:25 EDT 2001


Don Holmgren wrote:

> The motherboards recently released for dual Pentium IV Xeons which are
> based on the i860 chipset have 64/66 PCI slots.  The ones that I know
> of are the Tyan Thunder-i860 and the SuperMicro P4DC6, as well as the
> motherboards used in the Dell Precision 530 and Compaq W8000.

i860 is cheesy. It has the 64/66 label but not the performance.

There is not a lot of choice for PCI 64/66 :
* ServerWorks: the best, very good PCI chipset.
* Intel i860: Don't wonder why Intel is using ServerWorks 
chipset for high-end servers.
Yes, the 760MP is 64/33.

For the future, ServerWorks is working on a P4 chipset and 
the 760MPX should be 64/66. I expecte very good perf from 
ServerWorks, but I have no clue about 760MPX PCI 
implementation.

For GigE or Giganet, 64/33 is good enough (peak at 250 MB/s, should 
support full-duplex bandwidth). For SCI or Myrinet, you really want 
64/66.

Regards

Patrick

-----------------------------------------------------------
|   Patrick Geoffray, Ph.D.      patrick at myri.com         |
|   Myricom, Inc.                http://www.myri.com      |
|   Cell: 865-389-8852           325 N. Santa Anita Ave.  |
|   Fax:  865-974-1950           Arcadia, CA 91006        |
-----------------------------------------------------------



_______________________________________________
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf



More information about the Beowulf mailing list