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Rosewill Model RC-301 - Dual Serial Port PCI Card / PCI Parallel Port Card

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  • PCI to 2 x Serial Port Card / Parallel Port
  • Data Transfer Rate of 115200bps
  • NetMos 9835 Solution Supports up to 2 x 16550 Fast UART Serial Port
  • Multi-card Capability Allows Upgrades with Additional Serial or Parallel Cards
  • Easy Plug and Play Installation in DOS, Lunix, Windows 95, 98, ME, 2000, NT, XP, XP 64 Bit

  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The Rosewill RC-301 dual port serial card is a cost effective solution for people who need multiple ports. Rosewill's RC-301 dual serial port card supports high transfer rates. The DB9 connector makes it compatible with most devices on the market.

IRQ sharing and auto-selection make installation and setup a snap.

  • newegg Two Serial Ports The Rosewill RC-301 features two 9-pin RS232 serial ports to add additional serial capability to your computer. Just connect your computer with serial port devices such as modems easily!
  • newegg PCI Interface The Rosewill RC-301 features a PCI interface compliant with Plug-n-Play. Simply install the card into your PC's free PCI slot without powering down the system!

Learn more about the Rosewill RC-301




PCI to Serial Port Card
External Ports
2 x 9 pins serial connectors
Data Transfer Rate
Operating Systems Supported
Windows 2000, Windows XP/2003/Vista 32/64 bit, Windows 7 32/64 bit, Windows 8 32/64 bit, Windows 10, Linux
Chipset: MOSCHIP MCS9835CV


Supports up to 2x 16550 Fast Uart serial port

Easy Plug and Play installation

Automatically selects IRQ & IO address

Supports IRQ sharing

Built in 16C550 compatible UART with 16byte transmit-receive FIFO

Multi - card capability - allow for upgrade with additional serial or parallel cards

For 5V PCI slot only


Package Contents
Manual, CD Drivers,RC-301 Serial Port Card

Additional Information

Date First Available
January 17, 2006
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 0 day
  • Limited Warranty period (labor): 1 year
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by's Standard Return Policy.
Ownership: more than 1 year
Verified Owner
5/ 5
Serial Duals 6/28/2014 4:16:20 PM

Pros: This is another Rosewill product that worked right out of the box and worked after upgrading from Windoze XP to Winnie 7 Pro with Zero issues - Note: Use the MosChip drivers on Rosewill's site as they worked flawlessly with Win7 Pro 64 bit. (Same as another user did - so that seems to be a sure fire workable solution)
Rosewill makes Great Products and just bought their CAT & cable and will be leaving updates on that as soon as i install them in the network where this card happens to be in one of the PC's - Will update later.

Cons: none

Overall Review: Could have sent a Thumb Screw for easy installation - would have been nice, but was not included in the package nor shown in the pics - So no Egg Off as it was clear you don't get one

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Ownership: more than 1 year
Verified Owner
5/ 5
It works well for me. 5/20/2014 10:19:13 AM

Pros: It works well on my Win 7 64 bit computers. I use the MosChip driver

Cons: Windows update wants to install ASIX drivers. Those don't work.

Overall Review: I got the MosChip drivers on Rosewill's site. They may also be on the included CD. I didn't look.

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Ownership: 1 day to 1 week
Verified Owner
5/ 5
3/19/2014 10:56:54 AM

Pros: It works great. Windows 7 64 bit didn't detect as other reviews said it would, but the CD installed the drivers quickly and it works. Does what I needed it to do.

Cons: None

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Ownership: more than 1 year
Verified Owner
1/ 5
Destroys MB audio and PCI 2/11/2014 5:03:31 PM

Pros: If you find the right drivers, it does work. But caution, only on older motherboards should you use this card.

Cons: I installed this in two motherboards, P8Z77-V and a P8Z68-v, and on both motherboards the audio chip toasted. I highly recommend avoiding this serial port card except for legacy systems.

Overall Review: Unfortunately the first MB I installed I was not using the audio. I tried the card in second computer, P8Z77-V and heard a distinct pop on the speakers. Since then the audio is gone. Not sure what the issues is, but this card is dangerous to other devices on the PCI bus. Only use this on older systems. The card did work, but I have no idea why this would cause problems with the realtek audio on the MB.

0 out of 3 people found this review helpful. Did you?
Manufacturer Response:
Dear Valued Customer,
Thank you very much for purchasing this unit.
We strive to provide the most reliable and highest quality products to our customers.

We are sorry to hear that, please contact our support team to assist you with warranty options.

Phone: 1- 800-575-9885

We look forward to hearing from you.

Rosewill Customer Care
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Great forAmateur Radio use 3/9/2013 10:59:30 AM

Pros: I installed this card and it worked just fine from the stat, you have to make sure it's seated! I run some legacy serial HAM radio hardware (Kantronics TNCs, and KENWOOD computer remote control of transceivers) It woks great. Couldn't be more satisfied.

Cons: I have not run into any CONs so far, has worked flawlessly!

Overall Review: This card has enabled me to operate modes that I really enjoy, and the solid performance makes operation a pleasure!

1 out of 1 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
10/13/2012 2:10:13 PM

Pros: I wanted to use it to program PLCs, works fine

Cons: none

Did you find this review helpful?
Ownership: 1 day to 1 week
Verified Owner
1/ 5
Going back 7/17/2012 2:12:01 PM

Pros: Was cheap

Cons: Doesn't work.

Overall Review: Driver disk refuses to install drivers. Chipset manufacturers website even worse. Got it to work once. After reboot, disappeared again and refused to re-install. Win 7 64bit doesn't recognize it. Sending it back.

0 out of 1 people found this review helpful. Did you?
Ownership: more than 1 year
Verified Owner
2/ 5
Issues with Windows 7 6/25/2012 6:54:46 AM

Pros: Helps your use up that more than likely empty PCI slot.

Cons: Doesn't seem to work with devices connected.

Overall Review: I bought this to connect my Dex Drive to backup old PS1 and N64 saves. Neither device was detected whenever connected to the expansion card. Yes, the computer was off and the devices were turned on prior to device installation.

0 out of 1 people found this review helpful. Did you?
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