4xGTX570
Intel Core i7-3820 testing with a ASRock X79 Extreme11 and 4 x NVIDIA GeForce GTX 570 HD on CentOS 6.3 (Final) via the Phoronix Test Suite.


Memory bandwidth on 4 Geforce GTX570: 

	Processor: Intel Core i7-3820 @ 3.60GHz (4 Cores), Motherboard: ASRock X79 Extreme11, Chipset: Intel Xeon E5/Core, Memory: 8 x 4096 MB DDR3-1333MHz, Disk: 128GB M4-CT128M4SSD2, Graphics: NVIDIA GeForce GTX 570 HD, Audio: Intel C600/X79, Network: Broadcom NetLink BCM57781 Gigabit PCIe

	OS: CentOS 6.3 (Final), Kernel: 2.6.32-279.el6.x86_64 (x86_64), Compiler: GCC 4.4.6 20120305 + CUDA 5.0, File-System: ext4


CUDA bandwidthTest 5.0
Memory type: Pageable memory - Memory transfer path: Device to host
MB/sec > Higher Is Better
Memory bandwidth on 4 Geforce GTX570 . 22613.27 |==============================


CUDA bandwidthTest 5.0
Memory type: Pageable memory - Memory transfer path: Host to device
MB/sec > Higher Is Better
Memory bandwidth on 4 Geforce GTX570 . 23754.50 |==============================


CUDA bandwidthTest 5.0
Memory type: Pageable memory - Memory transfer path: Device to device
MB/sec > Higher Is Better
Memory bandwidth on 4 Geforce GTX570 . 524652.13 |=============================


CUDA bandwidthTest 5.0
Memory type: Non-pageable system memory - Memory transfer path: Device to host
MB/sec > Higher Is Better
Memory bandwidth on 4 Geforce GTX570 . 25266.60 |==============================


CUDA bandwidthTest 5.0
Memory type: Non-pageable system memory - Memory transfer path: Host to device
MB/sec > Higher Is Better
Memory bandwidth on 4 Geforce GTX570 . 25394.93 |==============================


CUDA bandwidthTest 5.0
Memory type: Non-pageable system memory - Memory transfer path: Device to device
MB/sec > Higher Is Better
Memory bandwidth on 4 Geforce GTX570 . 524678.57 |=============================