The Battle in 64 bit Land Revisited

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Looking Forward: The 64 bit Landscape A Year From Now

Over the next twelve months three very powerful new 64-bit MPUs will ship, or be near shipping – IBM’s POWER4, Intel’s McKinley, and Compaq’s Alpha EV7. In addition, many existing processors designs will likely see incremental clock rate and performance increases. The characteristics and performance of these processors are provided below in Table 1. The 0.13 um (Northwood) implementation of the 32 bit Pentium 4 processor is also included for reference purposes. AMD x86-64 processors were not included because not enough information has been disclosed about them. The characteristics are taken from vendor data where possible. Performance figures and undisclosed processor characteristics are based on estimates and/or extrapolations from public data.

<b>Table 1 Predicted Computing Landscape, Mid 2002</b>
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Alpha EV7

IA64 McKinley

PA-8700

Pentium 4 (0.13 um)

POWER4

US-III

Frequency (MHz)

1200

1200

900

2500

1100

1000

Max Power (W)

125

150

60

50

115

90

Die Size (mm2)

397

450

350

140

400

244

Transistors

152m

214m

200m

60m

170m

23m

L1 cache (KB)

64 / 64

16 / 16

1536 / 768

12u /16

64 / 32

32 / 64

L2 cache (MB)

1.75

0.25

0.5

1.5

L3 cache (MB)

2.25

external

Syst. BW (GB/s)

44.8

6.4

1.5

3.2

92

2.4

SPECint_base2k

1000

700

660

750

900*

470

SPECfp_base2k

1600

1500

580

720

1400*

460

* single processor score

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