02-19-2019, 10:43 PM
On the topic of Threadripper having 64 PCI-E lanes, please note that not all of those lanes are usable and the number is often misleading. Only 60 of those lanes are available for use, 4x are dedicated to the chipset on the board. And of the remaining 60, only 48 or 32, depending on the motherboard used, can be used for GPUs, 12 are designed as reserved for NVME storage or other IO. On top of all of that, a maximum of 7 directly attached PCI-E devices can be used with Threadripper cpu at 1 time(inc. storage, gpus, network, etc.). Any more PCI-E devices must be added via use of a PLX multiplexing chip. You may not be happy to find out that 8 GPUs doesn't want to work because your motherboard doesn't have the capabilities to multiplex PCI-E connections and threadripper doesn't support 7< devices.