I have observed the extremely dreadful presentation from PCI-E 1X cards recently? The issue I have observed with firewire and USB cards. As far as I know theoretically speed must be 250 MB/s but I even not approached it remotely. Framerates for firewire cameras are greatly superior during ordinary PCI firewire boards than all the way through whichever PCI-E boards I've experienced. This not only the issues of Firewire board, the USB boards are also included in this drastic behavior. The PCI-E is invented to comprise improved performance the PCI. Do you have any good choice of Firewire and USB boards that performed well on PCI-E 1X? Otherwise I hope that my measuring tool itself is not good enough? Do you have any other option for measurement?
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