Here :
http://www.nvidia.com/object/tesla_gpu_processor.html
Product Details
Tesla C870 GPU Computing Processor
One GPU (128 thread processors)
Over 500 gigaflops
1.5 GB dedicated memory
Fits in one full-length, dual slot with one open PCI Express x16 slot
Tesla D870 Deskside Supercomputer
Two GPUs (128 thread processors per GPU)
Over 500 gigaflops per GPU
3 GB system memory (1.5 GB dedicated memory per GPU)
Quiet operation (40dB) suitable for office environment
Connects to host via cabling to a low power PCI Express x8 or x16 adapter card
Optional rack mount kit
Tesla S870 GPU Computing Server
Four GPUs (128 thread processors per GPU)
Over 500 gigaflops per GPU
6 GB of system memory (1.5 GB dedicated memory per GPU)
Standard 19”, 1U rack-mount chassis
Connects to host via cabling to a low power PCI Express x8 or x16 adapter card
Standard configuration: 1 PCI Express connector driving 4 GPUs
Optional configuration: 2 PCI Express connectors driving 2 GPUs each
http://www.nvidia.com/object/tesla_gpu_processor.html
Product Details
Tesla C870 GPU Computing Processor
One GPU (128 thread processors)
Over 500 gigaflops
1.5 GB dedicated memory
Fits in one full-length, dual slot with one open PCI Express x16 slot
Tesla D870 Deskside Supercomputer
Two GPUs (128 thread processors per GPU)
Over 500 gigaflops per GPU
3 GB system memory (1.5 GB dedicated memory per GPU)
Quiet operation (40dB) suitable for office environment
Connects to host via cabling to a low power PCI Express x8 or x16 adapter card
Optional rack mount kit
Tesla S870 GPU Computing Server
Four GPUs (128 thread processors per GPU)
Over 500 gigaflops per GPU
6 GB of system memory (1.5 GB dedicated memory per GPU)
Standard 19”, 1U rack-mount chassis
Connects to host via cabling to a low power PCI Express x8 or x16 adapter card
Standard configuration: 1 PCI Express connector driving 4 GPUs
Optional configuration: 2 PCI Express connectors driving 2 GPUs each