Precision Fixed Workstations

Last reply by 10-23-2022 Unsolved
Start a Discussion
2 Bronze
2 Bronze

Precision 3660 Thunderbolt 4

I recently purchased 2 Precision 3660 workstations, which according to the spec sheet (Page 7 of ) is compatible with a thunderbolt 4 add-in card.

I bought a Asus thunderbolt 4 card, only to learn it was proprietary to Asus motherboards.

Does anyone know if this card will work for the 3660?

Replies (9)
2 Bronze
2 Bronze

Is there any Thunderbolt 4 card available for Precision 3660 at all? Does it require cabling or BIOS modification?


The ones I got have a thunderbolt header on the motherboard. So a PCIe add-in card would require at least a cable to connect to that header.

The one I picked up that wasn't compatible (because of a proprietary header connector) also required a 6-pin power connection off the PSU.

I tried to buy a Dell Thunderbolt 4 card from Dell but was told it was not available. They offered Thunderbolt 3 but I doubt that it was tested for compatibility. Previous generations of the 3600 series had a Thunderbolt option entry in the BIOS and a Thunderbolt driver but 3660 does not have that. It appears that Dell overpromised and underdelivered in this case.


The motherboard does have a 10-pin thunderbolt header (photo below).

Dell doesn't offer any manuals or documentation on ANY of their thunderbolt add-in cards online and support cannot seem to verify if the cards they carry will work.

TBT pic.jpg


2 Bronze
2 Bronze

Still no update from Dell support - despite sending a DM to their support team.

Page 67 of the service manual ( shows a diagram of the motherboard... and then gives no key to reference the numbered components on the board on the page prior, after, or the same page.

Item #22 in the below screenshot is labeled TBT on the board itself:




Life on the bleeding edge...

Sorry, I don't have any add'l info related, but share your concern.

I did find This webpage from  to be helpful in understanding the complexity in general of adding thunderbolt when it's not part of the system you take out-of-the-box.

Thank you for posting & I will be watching for updates/solutions. 


Also - I don't think any Thunderbolt 3 or 4 will work until/if Dell updates BIOS to provide support.



Unless it's hidden somewhere, I don't see support in the latest BIOS release for 3660 for any type of Thunderbolt. 

The 3660 BIOS is more than BIOS, kind of integrated miniOS/GUI shell for all things pre-boot. Nearly impossible to use without a mouse (and my everyday mouse, a wired USB Kensington Pro-fit full -size is impossible to use with the BIOS GUI - tiny movement of mouse moves pointer across the screen - I have to use a temporary mouse ....)

2 Bronze
2 Bronze

Also a very strange and misleading marketing information from Dell Corp.: They mention a thunderbolt card to order with the Precision 3460 configuration but will probably send a D-SUB 9 pin card (link)

Precsision 3460ff:


Precision 3660:




2 Bronze
2 Bronze

Two more updates:

1) Compatible TB4 controller driver for Precision 3660 Intel Thunderbolt Controller Application | Driver Details | Dell US

2) A card to ship in Dec. 2022 Thunderbolt 4 PCIe card - Full Height Customer Kit for Tower | Dell USA that does not specifically list Precision 3660 as compatible

Latest Solutions
Top Contributor