HP Z420 Workstation
Performance you want. Value you need. The HP Z420 gives you professional expandability in an accessible tool-free mini-tower form factor — all at a great price. With up to 8 discrete processing cores, the latest processing and I/O power from Intel®, and the latest graphics technology from leading graphics providers, the HP Z420 has the power you need to get the job done.

Liquid Cooling on the HP Z420 & HP Z820 Workstations Whitepaper