I can check one in lab later ( but I don't run3k at home..others only 2/5/7/9k...)
so..
trident+ chipset
there is no info about license, but there is some license on flash ( on the ebay listing )
typical ac power/max @ psu level143W 199W
are they loud..it depend
you will hear anything in quiet room...
still supported ( new software is from 10 March , release notes:
Cisco Nexus 3000 Series NX-OS Release Notes, Release 7.0(3)I4(6) )
what else:
•VLAN - 4096 max
•STP – RSTP / MSTP
•MAC Addresses – 128 K
•Etherchannels – 64
•ACL – 2K Ingress / 1K Egress
•Routes – 16 K Prefixes, 16K host entries, 8K Mcast routes, Routing Protocols – BGP, OSPF, EIGRP, RIPv2 (w/ ECMP
•vPC
•Layer 2 Multi Path
•EthAnalyzer
•EEM
•Python Scripting
•XML Management Tools
•DCNM
•SPAN
•CoPP
---
base license
Basic L3 features
Inter-VLAN routing, Static routes, RIPv2, ACLs, OSPFv2 (limited to 256 routes), EIGRP stub, HSRP, VRRP and uRPF
IP Multicast
PIM SM, SSM, MSDP
Lan enterprise:
Advanced IP Routing
OSPFv2, EIGRP, BGP and VRF-Lite