front-end execution core back-end
--------- -------------- --------
I1 - next IP
1 .--> I2 - Icache 1
2 | I3 - Icache 2 / ILD
3 | I4 - Decode 1 / rotate
4 | I5 - Decode 2
5 | I6 - Decode 3
6 | I7 - Register rename
7 | I8 - RS write
8 | O1 - RS schedule
9 | O2 - RS dispatch
10 `---- branch mispredict ----- O3 - execute
R1 - Retire 1
R2 - Retire 2
R3 - RRF write
| Clock speed (MHz) | 166 | 180 | 200 | 200 |
| Bus Speed (MHz) | 66 | 60 | 66 | 66 |
| L2 Cache | 512K | 256K | 256K | 512K |
| Manuf. Process | 0.35 micron | 0.35 micron | 0.35 micron | 0.35 micron |
| Die Size | 552 mils/side | 552 mils/side | 552 mils/side | 552 mils/side |
| CPU Voltage | 3.3V | 3.3V | 3.3V | 3.3V |
| Maximum Current | 9.4A | 10.1A | 11.2A | 12.4A |
| Power (Watts) | 27.5 typ; 35.0 max | 25.3 typ; 31.7 max | 28.1 typ; 35.0 max | 32.6 typ; 37.9 max |
| Performance* | 7.22 SPECint95 5.84 SPECfp95 | 7.28 SPECint95 5.59 SPECfp95 | 8.20 SPECint95 6.21 SPECfp95 | 8.58 SPECint95 6.48 SPECfp95 |
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See also these figures and tables that include the P6 and other contemporary designs.
| point of comparison | figure or table number | page in Yung |
|---|---|---|
| relative performance | Figure 1-1 | 5 |
| clock frequency | Figure 1-2 | 6 |
| transistor count | Figure 1-3 | 7 |
| core only | Figure 1-4 | 8 |
| costs | Table 2-7 | 44 |
| general comparison | Table 2-10 | 52 |
| integer perf. vs. clock | Figure 2-4 | 60 |
| fp perf. vs. clock | Figure 2-5 | 60 |
| integer performance | Figure 2-6 | 62 |
| fp performance | Figure 2-7 | 63 |
Discussion questions for The Pentium Chronicles