Scheduled to sell before Christmas, the new HP XW6600 Desktop is configured with Quad-Core Intel Xeon processor 5400 series, up to 128 GB of memory, and up to 5 TB of HDD. Looking that configuration, it remains me to the mid-end server configuration, it is really a huge system.
New HP XW6600 Desktop Workstation was announced along with another new worsktation: the HP XW8600 workstations. Both configuration relatively has the same specification including the PCI Express Gen2 x 16 graphics slots. As mentioned by krunker.com, the price tag starting at about $1200.