5 ms·
Some of the high end Xeon systems have gobs of PCIe lanes. If you have a four CPU socket system, you can hang four x16 PCIe cards off of each processor.
by ansible 10y ago
Some of the high end Xeon systems have gobs of PCIe lanes. If you have a four CPU socket system, you can hang four x16 PCIe cards off of each processor.
- llukas 10y agoOr get specialized board with PCIe switch ie. http://www.cirrascale.com/blog/index.php/welcome-big-sur/ http://www.cirrascale.com/blog/index.php/welcome-big-sur/ so GPUs get better bandwidth (P2P etc).
- svacko 10y ago4CPU sockets !=> 4x x16 cars. It always depends on the number of PCI lanes for each processors. Check i.e. these 2 E7 Xeons: http://www.intel.com/content/www/us/en/products/compare-products.html?productIds=93811,93804 http://www.intel.com/content/www/us/en/products/compare-prod... Both have max 32 PCI Express lanes - so you can theoretically hang max 2 PCIx x16 cards off each CPU, but as few of the lanes is reserved for other peripherals, in 4GPU/CPU setup they will practically run at lower speeds, ie 8/8/4/4. However, using system with PCIe root complex [1] can improve the GPU<->GPU communication speed. [1] https://www.microway.com/hpc-tech-tips/pci-express-root-complex-confusion/ https://www.microway.com/hpc-tech-tips/pci-express-root-comp...