Adding ports to a desktop starts with the expansion slot inside it. This PCI and PCI Express card buying guide explains how to compare USB and serial cards at Richcom in Sri Lanka, with attention to the computer and the devices you need to connect.
Compare the current Controller Cards range and prices in Sri Lanka. Use this guide to decide what to check, then read the complete specification on your chosen listing.
PCI and PCI Express Card Buying Guide: PCI and PCI Express are different interfaces
Check your motherboard manual and inspect the available slot before buying. Conventional PCI and PCI Express use different connectors and are not interchangeable. Also check the case height: a small desktop may need a low-profile bracket. An empty-looking space at the rear of the case does not confirm that the required motherboard slot is present.
Choose the ports your equipment needs
For USB devices, compare the connector type, stated USB generation and any auxiliary power requirements. A headline bandwidth describes the interface rather than promising that every connected device will reach that rate at once. For serial equipment, confirm the electrical standard and cable pinout. Some industrial serial cards offer configurable powered pins, which must match the connected equipment.
Verify drivers before installation
Compare the operating system and its version with the card maker’s driver support. An older listing naming Windows XP or Windows 7 does not establish support for a current operating system. Confirm required brackets and cables, then schedule installation with a compatible driver available. Avoid changing serial-card jumpers without the manual for that exact model.
Current Richcom listings to compare
These are examples from the published catalogue, rather than a complete shortlist for every application. Prices are in LKR, checked on 10 October 2026. Follow each link for the current price, availability, ordering conditions and full specification.
| Listed product | Listed price (LKR) |
|---|---|
| PCI Express 2 Serial Port Card (6M) | 12,500 |
| PCI Express 4 Port USB 3.0 Card (6M) | 14,500 |
| PCI 4 Port USB Card (6M) | 10,500 |
Before ordering
- Confirm PCI or PCI Express slot type.
- Check full-height or low-profile bracket requirements.
- Verify operating-system drivers and device connections.
- Read the individual warranty and confirm delivery or collection arrangements.
For a suitable shortlist, tell us the equipment you use and the result you need. Include model numbers and the relevant compatibility details. Contact Richcom Technology at [email protected] with your requirements.
Frequently asked questions
Can a PCI card go into a PCI Express slot?
No. These are different interfaces. Match the card to the motherboard slot.
Does a USB expansion card guarantee faster storage transfers?
No. The device, cable, controller and computer all affect the achieved transfer rate.
