FS 400Gbase-SR8 400GbE QSFP-DD Optical Transceiver Review

FS now also stocks 800G transceivers which are basically 2 of this technology slapped in 1 housing and bonded logically. People might ask “why so much bandwidth when the entirety of…” but an easy example is if you ever want to connect high speed memory between multiple systems (with GPUs is popular these days) you’ll still eat that for breakfast. Also remember not every network connection goes to an end host, you generally want something faster for the network<->network connections so you can connect lots of things effectively.

I just cant wait to see Netflix start pushing 4 x 400Gbps / 1.6Tbps per Box.

I wonder by the end of this decade, PCI-E 7.0 ( 6.0 has already been finalised ), if we could fit 1.6Tbps in a single Transceiver. Serving 6.4 Tbps per box. ( Likely to be either CPU or Memory bound )

Very likely there will be a 1.6T DR4 module in QSPFP-DD/OSFP form factor before 2030 that targets data center interconnects (< 120km). The technology (mostly) exists at this point, though the thermal density and die area pose some challenges.

$500, 10W. 50GBps.

Compare versus 63GBps throughput for PCIe 5.0 x16.