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Inside the NVIDIA PX2 board on my HW2 AP2.0 Model S (with Pics!)

KyleDay

Active Member
Oct 29, 2016
1,239
2,698
AZ
Hello All-

Today I was reading the following thread (which is wonderful by the way) about the known and unknown properties of the HW2 camera suite. I suggest you read it if you're into highly technical stuff:

AP2.0 Cameras: Capabilities and Limitations?

However, even after seven months since release, nobody has decided to disassemble the new NVIDIA PX2 AP2.0 box inside the glove compartment and see what is inside. Today I did. Many have speculated that Tesla was using the dual-socket CPU, dual-socket GPU board that was touted in the PX2 press releases. NVIDIA's website list two versions of the board, a single socket board, and a dual socket board. Here's a screenshot:


Screen Shot 2017-05-21 at 3.00.11 PM.png


Many people have assumed that because the "Autochauffeur" board shows 8 camera connection points on the dual socket board, that this was the board Tesla was shipping in HW2 cars. However, as pointed out in the linked thread above, the "Autocruise" board also supports up to 8 camera (plus radar/lidar) inputs. After tearing down my car today, I can virtually confirm that Tesla is shipping the "Autocruise" version of the board, with 8 camera + radar inputs, with a single CPU and GPU socket. The PCB is a custom Tesla design that looks overly large for the heatsink enclosure. My guess is that this is a Gen 1.0 design that they knew they would revise into a future dual socket version in the future. They've built the AP2.0 hardware box as a form factor for a larger board, but we get the small board's contents at the moment.

Here are the teardown instructions and pictures of my own HW2 AP2.0 car's NVIDIA PX2. It appears to be revision 1078321-60-C.

First - the car: December 2016 S60 RWD:

IMG_5215.JPG


First, POWER OFF the car via the main screen settings selection. Then open the glove box (otherwise it'll be locked and closed). Then, disconnect the 12v at the battery's negative terminal, then disconnect the emergency power connection (don't cut it, just disconnect):

IMG_0788.JPG

IMG_1298.JPG


Then remove the trim below and above the glove box:

IMG_0752.JPG


IMG_8583.JPG


Remove the six screws that hold the glove box in place, and remove the three wires connected to the glove box - and wallah - out it comes!

IMG_8226.JPG


Now you can see the AP2.0 computer above where the glove box was (it's the big silver box). Disconnect the wires and remove the four nuts that hold it in place. Out it comes!

IMG_4386.JPG


IMG_4874.JPG


IMG_0587.JPG
 

KyleDay

Active Member
Oct 29, 2016
1,239
2,698
AZ
And there's the Ublox! This totally answers so many questions. Can't thank you enough

What questions?

Also, what's interesting is that my revision is 60-C. Your revision models you listed were all 70-x numbers. Why is mine 60?
 

stopcrazypp

Well-Known Member
Dec 8, 2007
10,523
5,471
So confirmed that it is 1 SoC and 1 discrete GPU connected via MXM.

Edit: The process to swap isn't as onerous as I expected. I can see why Tesla said it's relatively easy to upgrade. With the GPU on MXM, they can potentially also do a GPU-only swap to the new Volta.
 
Last edited:

bjornb

Member
Feb 12, 2015
181
490
Norway
Many people have assumed that because the "Autochauffeur" board shows 8 camera connection points on the dual socket board, that this was the board Tesla was shipping in HW2 cars. However, as pointed out in the linked thread above, the "Autocruise" board also supports up to 8 camera (plus radar/lidar) inputs. After tearing down my car today, I can virtually confirm that Tesla is shipping the "Autocruise" version of the board, with 8 camera + radar inputs, with a single CPU and GPU socket.

I disagree, Tesla have something in between "Autocruise" and "Autochauffeur". My understanding is that the PX 2 Autocruise contains just a Parker SOC, no discrete GPU via MXM.
 
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Bladerskb

Senior Software Engineer
Oct 24, 2016
2,327
2,670
Michigan
Actually, it is exactly as powerful as they claim. 12 trillion OPs, which is half the 24 DL TOPs quoted by Nvidia for a PX2 with 2 SoC and 2 discrete GPUs. This makes sense now actually.

Powerful in the sense that it will deliver level 5 FSD while nvidia say not even close more like highway autonomy.
This makes the "all cars have level 5 fsd hardware capability" even more of a sham.
 

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