PPT Slide

66 MHz x 64 b

= 528 MB/s

Intel approach is to increase number of dedicated buses (similar to SGI machines designed more than 5 years ago).

Intel Pentium II has a 32 bit-wide Accelerated Graphics Port (AGP) and dedicated non-blocking 64 bit-wide port for 512 kB SRAM L2 cache.

For more information on AGP see:

http://developer.intel.com/drg/mmx/AppNotes/agp.htm

Hardware improvements reduce bottlenecks

Pentium II

CPU, ??MHz

System controller

PCI I/O bus 33 MHz x 32 b = 132 MB/s

LAN

SCSI

High-speed network

Hard drive

Main memory

DRAM

L2 cache

SRAM

ISA / IDE bus

extension controller

CDROM

1997 - Jan. Intel Pentium MMX (150 - 233 MHz)

1997 - 2Q AMD K6 MMX (233 - 300 MHz)

1997 - 2Q Intel Pentium II (233 - 300 MHz)

1997 - 3Q Intel Deschutes (300 - 433 MHz)

1998 - Intel Katmai

1999 - Intel Merced

Processor Clock (MHz) SPECint95 SPECfp95

Pentium II 266 10.8 6.9

DEC Alpha 266 7.9 11.8

Pentium II 300 11.6 7.2

DEC Alpha 333 9.8 12.5

DEC Alpha 500 15.0 20.4

Gigabit Ethernet

ATM

133 MHz x 32 b

= 532 MB/s AGP

Graphics

accelerator

4 MB frame buffer

Display

?/2 MHz x 64 b

= 4? MB/s

PCI I/O

expansion slots

800 MB/s peak

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