Comparison of Sun Fire E25k and the Sun SPARC Enterprise M9000

A detailed blog posting by "Mr Benchmark" from the Sun Solution Center has a detailed comparison of Sun Fire E25k and the Sub SPARC Enterprise M9000.
Four benchmarks are used to compare the performance of these two large servers:

1. iGenCPU v3 - Fractal simulation 50% Integer / 50% floating point
   
2. iGenRAM v3 - Lotto simulation (Memory allocation and search)
   
3. iGenBATCH v2 - (Oracle 10g batch using partionning, triggers, stored procedures and sequences)
   
4. iGenOLTP v4 - (Heavy-weight OLTP)

Key Feature Comparisons:

Systems	E25k	M9000
Max processors	72	64
Max cores	144	128
Max HW threads	144	256
Max memory	1152 GB	2048 GB
Memory bandwidth	173 GB/s	737 GB/s
I/O bandwidth	36 GB/s	244 GB/s
Max internal disks	0	64
Max domains	18	24
OS support	Solaris 9 or 10	Solaris 10 U4
Media	None	DVD, DAT
Power type	1 phase	1 or 3 phase
Max Power	30.6 kW	42.6 kW