Processor compatible ESXi 6.5 , but system not

Hi all

Im planning to build my vmware esxi 6.5 home lab using either ((that will help me for VCP DCV 6.5 and my CCIE LAb))

1) IBM X3650 M3  2x Quad core Xeon X5570 or  2X  HEX core Xeon X5670 system

OR

2) HP Proliant DL380 G6  2 x Quad core Xeon X5550

but CPU compatible list says these both CPU support ESXi 6.5 .

but when i search for IBM X3650 system and HP system , vmware compatibility list says it does not support ESXi 6.5.

im Little confused with this mismatch , please help to clarify this confusion.