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Sonnet Technologies McFiver PCIe Card
Multifunction Adapter Card with Dual M.2 NVMe SSD Slots, 10Gb Ethernet, and Two 10Gbps USB-C Ports
A Professional Multifunction PCIe Card compatible with Mac | Windows | Linux
- Multiple Functions, One Card: Provides NVMe storage, 10Gb Ethernet, and 10Gbps USB-C connections on one PCIe 3.0 card.
- Two High Performance M.2 NVMe SSD Slots: Add up to 16TB of storage inside (SSDs sold separately); four lanes of PCIe 3.0 bandwidth available to each installed SSD achieve data transfer speeds up to 6600 MB/s (SSDs configured as RAID 0 set).
- No SSD Thermal Throttling: An efficient integrated heat sink enables installed SSDs to maintain high performance during very large file transfer operations.
Dual M.2 NVMe SSD Slots
Two 10Gbps USB 3.2 Type-C Ports
10Gb Ethernet Port
Silent SSD Cooling
Install the McFiver PCIe Card into an available x8 PCIe 3.0 or 4.0 slot to obtain maximum performance in your computer.
One PCIe x8 Slot is all You Need
Are you looking to add SSD storage, ultra-high-speed Ethernet connectivity, or high-performance USB-C ports to your setup? Or all three? Even in computers with multiple expansion card slots, installing three adapter cards to get the interfaces you need may not be feasible. Sonnet’s engineers designed a truly unique solution — the McFiver PCIe Card. Mac, Windows, and Linux compatible, this professional, multifunction adapter includes five interfaces — this is the only adapter card to feature dual M.2 NVMe SSD slots, one RJ45 10Gb Ethernet port, and two 10Gbps USB-C ports, fitting them all on a standard full-height PCIe card.
Super-powered USB Ports
The McFiver card provide 7.5W of power through each of its USB ports, supporting USB bus-powered SSDs and hubs without the need to connect an additional AC power adapter to the device.
No Auxiliary Power Required
Ordinary USB cards need a separate power connection. Sonnet’s McFiver card draws all the power necessary to operate connected drives from the slot it’s installed in. This enables you to install the Sonnet card in any compatible computer or Thunderbolt expansion system regardless of it having extra power connectors available.
Independent, Per-Port Power Regulation
The McFiver card regulates power to each port independently, providing each one protection from power glitches on the adjacent port. Ordinary USB cards can provide poor power regulation, allowing a connected drive to be forced off (auto-disconnected) when an additional drive is connected or disconnected.
Resettable Fuses
Unlike ordinary USB cards, the McFiver card features a resettable fuse on each port that protects both the card and computer should a cable or peripheral fail. Resetting a tripped fuse is simple — just shut down and then restart your computer.
Chester Finly
Reviewed in the United States on May 10, 2025
Great product. Can move 1GB/s through those usb c ports. Ethernet is fast. On a CMP 5,1 SSD performance with a gen 4 WD ssd is 2.5 GB/s. It registers as gen 3 in the WD software but doesn’t hit gen 3 speeds.
PKB
Reviewed in the United States on April 7, 2025
Excellent product with functionality as described, though the card, once installed, whether you use SSDs or not will disable the system boot volume selection tool (boot picker/menu accessible by holding down Option key prior to startup chime) on 2010-2012 Mac Pro 4,1 and 5,1. Hope this gets fixed with an update as the card is really useful, but at least for me, this shortcoming is a deal breaker.
NJayE
Reviewed in Australia on April 3, 2025
USB c and ethernet not working.This card is faulty and consequently I will be seeking warranty with Amazon
Rudy De Volder
Reviewed in the United States on July 31, 2024
I immediately observed that the card was mostly working at cold boot. But mostly not at reboot. In 50% of the reboots it came back on. I did some research on the net and found that the 10Gb chipset they used the aquantia aqc113cs has some stability issues like this that sometimes could be solved with a bios update of the motherboard or using a shielded CAT-7 cable. I already observed running Iperf3 that the communication speed was far from 10Gb/sec. So tried everything to improve this and did hundreds of reboots since I only had 50% chance of the card being recognized. After doing a passthrough in ProxMox I installed Truenas scale who recognized the aquantia aqc113cs. But what happened next was the final nail in the coffin of my card. I tried to copy many files and I saw the already slow speed going down after 5 minutes until 0. And I observed my whole server was hang up for the first time ever. After that I could do even a cold start any more unless I removed the McFiver. I decided to try one more time and plugged in the card. Result: I could start my server again, but beside the undocumented LED's on the McFiver, all functionality of the McFiver was gone, my SSD's, and my 10Gb, and probably also the 2 USB-C ports which I thought they where advertised as thunderbolt.I happily filed a case with Amazon within the time limits for return. Pity, I really looked forward to get this card to work.
Dana Fiorucci
Reviewed in the United States on May 7, 2024
This is one of the best expansion cards you can have for a G5 Mac Pro.I'm using it in my studio ona G5 Mac Pro running Monterey and it works perfect!
Gavin W.
Reviewed in the United States on March 18, 2024
Results in a Mac Pro 5,1 with two WD SN580 1tb in a Raid 1 booting Fedora were fantastic. Consistent peak above 2600 MB/s read (and even much higher on the first test after boot [pic]). Surprisingly more than twice as fast as using two separate cards. Probably taking advantage of the extra PCI lanes to get more performance out of the old PCIe 2.0 compared to typical 4 lane cards in this old machine. Im not sure if the ethernet and USB are going to be fighting for throughput but with these speeds and the versatility it gives me I don't care.
Richard C. Cruz Jr.
Reviewed in the United States on October 20, 2024
My mac pro needed a boost for 4k video work. I am using Silcon Power brand NVMes - twi 4TB sticks - and though they are rated for faster speeds, I'm only getting around 1400 mb/s. I tested them separate and in raid 0, I got the same speeds. This is triple the speed I get with my spinning 8TB raid so I'm happy. Just an FYI to othes: I also have an RX580 GPU and a USB 3 card installed. You have to put the McFiver at the bottom PCIe 16x slot and the GPU above in the next 16x PCie slot. Otherwise, the GPU will block the 2nd 16x slot. Also, you should install a fan control app as my NVMes got hot and the speed throttled to unusable sow speeds. I'm trying to keep the temperature around 40c
BoraDori
Reviewed in the United States on July 26, 2023
Old and mighty Mac Pro 5,1, running Opencore Monterey. Using NVME Gen 3 4TB (3500 mb/s read/write) on PCIE, which is only PCIE 2 speed due to the age of the computer. On generic NVME PCIE adaptor, had read/writing around 1300-1500. With McFiver, now getting about 2300 - 2500 mb/s!Huge improvement on how the computer feels. Apps launch quicker and snappier. Internet browsing is definitely quicker too. My 14 year old computer ALMOST feels like Apple silicon computer for general use. Final Cut Pro feels snappier too. Rendering is better, but export time is still bad due to graphic card on PCIE 2.For those who wants to bring new life to Mac Pro 5,1, this is a must upgrade....if you are planning to use it daily, as it is not a cheap upgrade. I actually enjoy using the old cheese grater. Prior to the change, it was being used more as a home server for data storage, as it has 4 SATA + 4 PCIE. Now I'm using it as daily computer.Beside the NVME adapter, it comes with 2 x usb-C and 10G ethernet.USB-C port is a nice addition and functioned properly.10G ethernet does not work on Mac Pro 5,1. I believe Sonnet has mentioned that this was not built with Mac Pro 5,1 in mind and currently it will not work.Bottom line - It's worth the bump in NVME speed and 2 x usb-c port with using only 1 PCIE slot for Mac Pro 5,1. It's not cheap, so unless you will be using your Mac Pro 5,1 daily, consider whether it's worth for you and get few more years out of the old cheese grater.
Jeff R.
Reviewed in the United States on June 3, 2023
I was so excited to get this card because I have a couple extra M2 SSD cards I would like to use, plus the 10Gb Ethernet port is a great upgrade to my built-in 1Gb port. After some frustration and aggrivation with the card not working I gave a bad review, which I have now corrected. I finally figured out that I needed to install a special driver from their website at SonnetTech.com before installing the card. After I did that, the card works perfectly!!
Peter Schaub
Reviewed in Germany on January 23, 2023
das 10G Ethernet funktioniert noch nicht (allerdings MacPro 5.1 Monterey via opencore), aber die SSDs werden jetzt voll ausgereizt und das USB 3.2 ebenso
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