GSG-a41
Genstor AMD® 4u GPU GSG-a41
Up to 4 GPUs, 12 Cores and 128GB memory using dual AMD® CPUs.
features
  • 4U rack-optimized chassis.
  • AMD® Opteron® 2000 processor.
  • AMD® chipset SR5690/SP5100.
  • Up to 128GB DDR2 memory.
  • Dual-port Gigabit Ethernet.
  • 8x 3.5” hot-swap SATA/SAS bays.
  • LSI 2008 8 port SAS2 controller.
  • IPMI 2.0 with KVM, dedicated LAN.
  • 4 open PCI-E x16 2.0 slots for GPUs.
  • Redundant 1400W 80+ Gold level power supply.
Commonly asked-for add-ons:
ATI GPU AMD®/ATI® FirestreamT GPU.
NVIDIA GPU NVIDIA® TESLAT GPU
Some useful info:
Compare CPUs http://www.amd.com/us/products/server/processors/6000-series-platform/pages/6000-series-model-number-methodology.aspx
CUDA http://www.nvidia.com/object/what_is_cuda_new.php
OpenCL http://www.khronos.org/opencl/