My overclocked Mini:

Ram Disk:> cpu
System: PowerMac10,1
Machine: 0x1
PageSize: 4096 Bytes
CPUCount: 1
CPU0: 7447A (G4) Version 32771 Revision 258
CPU0: CPUClock 1579999997 BusClock 166402287
CPU0: FPU Unit exists
CPU0: Altivec Unit exists
CPU0: Performance Monitor Unit exists
CPU0: DataStream Unit exists
CPU0: ReservationSize 32
CPU0: Ticks 3
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
Ram Disk:> memtest disable
Allocated memory at 0x2307F840 -> 0x5C853ABF, 964510336 bytes
Writing and Verifying 0x00000000...
Write 1043 MB/sec. Verify 503 MB/sec.
Writing and Verifying 0xFFFFFFFF... Write 1044 MB/sec. Verify 503 MB/sec.
Memory is ok!