Hi... MacMini 1.5GHz here:

cpu

System: PowerMac10,1
Machine: 0x1
PageSize: 4096 Bytes
CPUCount: 1
CPU0: 7447A (G4) Version 32771 Revision 257
CPU0: CPUClock 749999997 BusClock 166567207
CPU0: FPU Unit exists
CPU0: Altivec Unit exists
CPU0: Performance Monitor Unit exists
CPU0: DataStream Unit exists
CPU0: ReservationSize 32
CPU0: Ticks 4
CPU0: CacheL1Type 0x0
CPU0: CacheL1Flags 0x1000F
CPU0: ICacheL1Size 32768
CPU0: ICacheL1Lines 1024
CPU0: ICacheL1LineSize 32
CPU0: DCacheL1Size 32768
CPU0: DCacheL1Lines 1024
CPU0: DCacheL1LineSize 32
CPU0: CacheL2Type 0x0
CPU0: CacheL2Flags 0x1001D
CPU0: ICacheL2Size 524288
CPU0: ICacheL2Lines 0
CPU0: ICacheL2LineSize 0
CPU0: DCacheL2Size 524288
CPU0: DCacheL2Lines 0
CPU0: DCacheL2LineSize 0

memtest
Allocated memory at 0x3ABBD7C0 -> 0x5CAD253F, 569462144 bytes
Writing 0x00000000... 606 MB/sec.
Verifying 0x00000000... 322 MB/sec.
Writing 0xFFFFFFFF... 654 MB/sec.
Verifying 0xFFFFFFFF... 327 MB/sec.
Memory is ok!