Okay, joining hosts to a pool, cant seem to be completed due to different cpu types, research i should be able to mask one can anyone confirm this is doable with these two boxes, and if so which should be masked to which ?? xe host-cpu-info cpu_count : 8 vendor: GenuineIntel speed: 2493.790 modelname: Intel(R) Xeon(R) CPU L5420 @ 2.50GHz family: 6 model: 23 stepping: 10 flags: fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht nx constant_tsc aperfmperf pni vmx est ssse3 sse4_1 hypervisor tpr_shadow vnmi flexpriority features: 040ce3bd-bfebfbff-00000001-20100800 features_after_reboot: 040ce3bd-bfebfbff-00000001-20100800 physical_features: 040ce3bd-bfebfbff-00000001-20100800 maskable: base AND........ xe host-cpu-info cpu_count : 8 vendor: GenuineIntel speed: 3000.280 modelname: Intel(R) Xeon(TM) CPU 3.00GHz family: 15 model: 6 stepping: 4 flags: fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht nx constant_tsc pni vmx est cid hypervisor tpr_shadow features: 0000e4bd-bfebfbff-00000001-20100800 features_after_reboot: 0000e4bd-bfebfbff-00000001-20100800 physical_features: 0000e4bd-bfebfbff-00000001-20100800 maskable: no