Low latency 2 port RS232 PCIe card

Previously, using a motherboard based UART, I have been able to schedule byte transmissions with high accuracy (~1ms). Having now been forced through system failure to change hardware, I have a PCIe serial port card. This seems to exhibit delays of 5 or 6 ms before it transmits, or notifies of a receive. Does StarTech have a product, preferably 2 port, that can achieve the low latency I am looking for.

Me again. Problem resolved. It was the receive FIFO buffering setting.

1 Like