Haven't used it, but this should do the trick:https://www.amazon.com/Qotom-Q555G6-S05-Qotom-Industrial-Barebone-Computer/dp/B07KM7YY4Y/ref=sr_1_2?dchild=1&keywords=Qotom-Q555G6-S05&qid=1595786382&sr=8-2It's a two-core, four-thread i5-7200U with a passmark of 3376 (vs. 2566 for the X3440), single-thread of 1788 (vs. 1139). Six intel NICs, RAM and SSD to your spec. I'm seeing US$326. If you're outside .us, of course, options will vary.
Also some people have expressed some concern between the provided SSD not necessarily being of the best quality, but your mileage may vary.