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LF650KB PCI Express (PCIe) 2 RS232 Serial + 1 EPP/ECP Parallel Port Adapter Card
Softio

LF650KB PCI Express (PCIe) 2 RS232 Serial + 1 EPP/ECP Parallel Port Adapter Card

Bottom line: The LF650KB PCI Express is a specs-and-price decision rather than a crowd-consensus one in the expansion cards category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ 15 kv ESD Surge Serial Port Protection, 30 kV ESD Parallel Port Protection
  • ✓ Backed by Softio's warranty and support channels

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Manufacturer description

LF650KB PCI Express (PCIe) 2 RS232 Serial + 1 EPP/ECP Parallel Port Adapter Card

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SpecPicks Verdict

SpecPicks scored LF650KB PCI Express (PCIe) 2 RS232 Serial + 1 EPP/ECP Parallel Port… using a rating × review-volume × price-fit model applied to published specs and reviews across the expansion cards category. Softio's expansion cards lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for expansion cards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Dual (2) High Speed 16C950 Serial + Single (1) Parallel Port for PCIe, Full & Low Height Mounting
  • 15 kv ESD Surge Serial Port Protection, 30 kV ESD Parallel Port Protection
  • Single Slot Solution with Complex Cable Included (HD44M to 2 of DB9M + 1 of DB25F)
  • RS232 Transceivers with 921k Support, Software Selectable NON-VOLATILE Clock Divisors

Full Specifications

BrandSoftio
StyleClassic
Style NameClassic
Model NumberLF650KB
Mfr Part NumberLF650KB
Compatible DevicesPersonal Computer
Hardware InterfacePCI
Warranty Description5 Year Manufacturer

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LF650KB PCI Express (PCIe) 2 RS232 Serial + 1 EPP/ECP Parallel Port Adapter Card is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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LF650KB PCI Express (PCIe) 2 RS232 Serial + 1 EPP/ECP Parallel Port Adapter Card
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