|
Feature
|
AMD
Athlon™ MP Processor |
Xeon
Processor |
Pentium®
III |
| Smart MP Technology |
Yes |
No |
No |
| QuantiSpeed™
Architecture |
Yes |
No |
No |
| Integer pipelines |
3 |
4 |
2 |
| Floating point pipelines
|
3 |
2 |
1 |
| Full x86 decoders |
3 |
1 |
1 |
| L1 cache size |
128KB |
12k µop +
8KB Data Cache |
32KB |
| L2 cache size |
256KB (on-chip) |
256KB on-chip |
256KB on 1.1GHz freq and
lower, 512KB on 1.2GHz |
| Total on-chip full-speed
cache |
384KB |
264KB + 12k
µop |
288KB on
1.1GHz freq and lower, 544KB on 1.2GHz |
| Total effective on-chip full-speed cache |
384KB (exclusive) |
256KB (inclusive) |
256KB on 1.1GHz freq and
lower, 512KB on 1.2GHz
(inclusive) |
| System bus speed |
266MHz |
400MHz |
100MHz or
133MHz |
| 3D enhancement instructions |
3DNow!™ Professional |
SSE2 |
SSE |
| Single-precision FP SIMD |
Yes |
Yes |
Yes
|
| 4 FP operations per clock |
Yes |
Yes |
Yes
|
| Cache/prefetch controls |
Yes |
Yes |
Yes
|
| Streaming controls |
Yes |
Yes |
Yes |
| DSP/comm extensions |
Yes |
Yes |
No |