For designing work or gaming, this desktop suits the purpose of both. It has 2 exist quad core cpu intel Xeon E5640 (with hyperthreading it works like a 16 core). It has a Geforce GTS 450 video card to handle gaming and work. the motherboard is also able to support dual graphics card (crossfire or SLI 2 similar to give more graphics memory). Although memory is not a lot (6GB DDR3), you can buy more memorys and upgrade it to as much as 192GB!! Each slot can hold a maximum of 16GB and it has 12 slots in total (6 on the motherboard, 6 on the memory riser). Below are the full specifications of the desktop. They are selling over $400 easily outside. There are no problems with the desktop. Comes with windows 7 installed and other programs can be installed upon request.
CPU: Dual Quad core xeon E5640 @ 2.66ghz per core (can be overclocked to 2.9ghz) 12mb cache (each cpu has 4 cores, 8 threads so with 2 cpu, it has 8 cores, 16 threads)
Memory: 6GB DDR3 ECC Memory (can be upgraded to a max of 192GB, memory riser is included in the deal to give you extra 6 slots to put memory)
Video card: Nvidia Geforce GTS 450
Hard drive: Seagate 250gb 7200RPM
Networking: 2 Gigabit Ethernet card for faster networking
E-SATA port
1100 Watt power supply
3 empty bays for more storage.
Any other info you need feel free to ask me