PCI to PCI Express Adapter Card

Install half-height/low profile x1 PCI Express interface cards in a standard PCI expansion slot

Product ID: PCI1PEX1

2.3 stars (3 reviews) |
  • Innovative bracket design adapts and secures the existing low profile/half-height bracket of the PCI Card
  • PCI revision 2.3 compliant with up to 133MBps of available bandwidth
  • Works with Universal Voltage PCI Slots (5V and 3.3V & 5V)
Your price

In stock: CA: 41 | US: 675

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The PCI1PEX1 PCI to PCI Express Adapter card lets you use low profile PCIe expansion cards in a server/desktop motherboard PCI slot. The adapter connects through a 32-bit PCI slot to provide a low profile PCIe x1 slot in its place; a spare, full size bracket is included for installation in larger desktop or server expansion slots that can accommodate a full-sized card.

The PCI to PCI Express Adapter features an innovative bracket design that adapts and secures the low profile PCI Express card into the converted slot, ensuring a versatile and economical solution for extending the usability of older PCI motherboards or using low profile PCIe cards that do not have PCI equivalents.


  • Use newer PCI Express cards on an older PCI-only system
  • Install a low profile/half-height, PCI Express card into a full profile PCI system
  • Upgrade expansion cards without having to upgrade the system

The StarTech.com Advantage

  • The unique bracket design allows a low profile/half-height PCI Express card to work seamlessly in a PCI-based expansion slot
  • Backed by a StarTech.com 2-year warranty and free lifetime technical support

Partner Numbers

  • Ingram Micro Canada 94515L
  • Tech Data Canada 5Z8478
  • SYNNEX Canada 4551007
  • ASI Distribution Canada 89539
  • UPC 065030837835


  • OS Independent logo
OS Independent; No additional drivers or software required


Warranty Information Warranty 2 Years
Connector(s) 1 - Connector Type(s) PCI / PCI-X (Universal 3.3 & 5V, 32-bit)
1 - Internal Ports PCI Express x1 Slot
Environmental Operating Temperature 0°C to 85°C(32°F to 185°F)
Storage Temperature -10°C to 95°C(14°F to 203°F)
Humidity 0~95% RH
Hardware Ports 1
Interface PCI Express
Bus Type PCI / PCI-X (5 / 3.3V)
Card Type Standard Profile
Chipset ID Pericom - PI7C9X111SL
Packaging Information Package Height 1,3 in [33 mm]
Package Length 6,8 in [17,3 cm]
Shipping (Package) Weight 3,6 oz [102 g]
Package Width 5,5 in [14 cm]
Performance MTBF 139,125 hours
Physical Characteristics Weight of Product 1,1 oz [32 g]
Color Green
Material Steel
Product Length 5,3 in [13,5 cm]
Product Width 2,4 in [60 mm]
Product Height 0,8 in [2 cm]
Software OS Compatibility OS Independent; No additional drivers or software required
Special Notes / Requirements Note The PCI1PEX1 combined with a low profile PCIe card bracket may not fit in some computer cases. In some cases an alternative bracket (provided by the PCIe card manufacturer) may be required to install the low profile card into the case. The included spare full profile bracket could be used as necessary as well.
What's in the Box 1 - Included in Package PCI to PCIe Card
Spare Full Profile Bracket
Instruction Manual


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Frequently Asked Questions

Before You Buy

Yes. This PCI card uses a universal connector keyed for both 3.3V and 5V that can be used with PCI and PCI-X. This type of connector is identified as having 2 separate notches, instead of just one.

Compliance and safety

Compliance letters

Safety Measures

  • If product has an exposed circuit board, do not touch the product under power.
  • If Class 1 Laser Product. Laser radiation is present when the system is open.
  • Wiring terminations should not be made with the product and/or electric lines under power.
  • Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
  • Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
*Product appearance and specifications are subject to change without notice.

Customer Reviews

(3 reviews)
2.3 out of 5 stars
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1 - 3 of 3 Reviews
(1 Stars)

Doesn't work with Windows 10

By: gene007 - 03-26-2020
Ordered one to put USB 3 card to 6 years old Lenovo workstation. I only had free old PCI slot, and there are no USB-3 controllers for PCI available. So I ordered this one. It simply doesn't work. PCI-Z test program, analysing PCI Bus, Stated this: Bridge Pericom Semiconductor PI7C9X111SL PCIe-to-PCI Reversible Bridge PCI bridge This device cannot start. (Code 10) 12D8:E111 0000:0000 Need device installer. Can be rebalanced. ---- So, the card REQUIRES some sort of a driver.
| Helpful?
Matt, Customer Support on 2020-03-26 12:17:51 PM
We apologize for the difficulties you're experiencing with our PCI1PEX1. This adapter is native and does not require any drivers. However, you need to ensure that the drivers for your PC are fully updated for the operating system you're using or your PC may have difficulties recognizing the adapter and connected PCIe card properly. If you require any assistance we'd be happy to help look into this with you. You can contact us at www.startech.com/support where our Technical Advisors are available 24 hours a day, 5 days a week to provide support.
By: tino - 03-06-2021
same problem here... the adapter is not recognized by windows . Not even listed among devices.
| Helpful?
(1 Stars)

Doesn't work on windows10

By: Harsh - 05-10-2021
I just bought it and it didn't detect it in windows 10, there si no driver for that also.
| Helpful?
Dan, Customer Support on 2021-05-10 1:55:48 PM
The PCI1PEX1 is OS independent and does not require any additional drivers or software. We will reach out to see if we can offer any assistance to get this working in your setup.
(5 Stars)

Works like a charm!

By: - 08-09-2021
I bought this product last week off Amazon and it was needed for a USB 3 upgrade to an old Athlon retro rebuild, I can confirm that both Windows XP and Vista recognized this adapter card with no issues, I have also tested the Transfer rate in real-time settings achieving a 4x faster transfer rate than USB 2 onboard system that came with the Shuttle AN35N-400, to say I am pleased is an understatement; will be purchasing another for a Sata card upgrade.
| Helpful?
By: frank85 - 12-01-2021
Hi. I installed this onto my ASROCK Z270 PRO4 motherboard, running OS. I connected a GTX 1660 TI GPU via a GPU riser to this PCI to PCIE adapter. But Windows does not recognise my GPU. Can you please assist me?
| Helpful?
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