Studio XPS 435T/9000, upgrade capabilities beyond design, #2

I can add a few more capabilities:

In a post here I offhand mentioned the possibility of getting PCIe Gen 3 speeds from the Dell XPS 435T/9000, even though it's motherboard is PCIe Gen 2.  I now have this working since prices for it are now reasonable. 

To do this, I used a PCIe 3 Switch add-in card to upgrade the 435T's x8 Gen 2 PCIe slot to four PCIe Gen 3 x4 slots at their full spec'd PCIe 3 x4 speed (~3200 MB/s).  (Note with the approximate doubling of speed between generations, the bandwidth of PCIe 2 x8 = PCIe 3 x4.) 

I use the 4 slots for a mix of NVMe SSDs (one or more as boot drives using Clover) and PCIe 3 x4 add-in cards.  The 4 slots come as NVMe SSD slots.  Using one or more of the 4 slots with PCIe 3 x4 add-in cards requires a separate riser for each AIC.  Without the PCIe Switch a NVMe SSD in the 435T will only run at ~1700 MB/s.  Since PCIe is Duplex, I can now for example copy between any two PCIe 3 x4 devices (like NVMe SSDs) at up to the full spec'd PCIe 3 speed (~3200 MB/s).  Compare this to the 435T's native SATA II speed of only ~280 MB/s.

Other capabilities:

Windows 11 (I plan to do a Ubuntu alternate boot as well).

USB 3.2 Gen 2 add-in PCIe card, 10 Gbps.  PCIe slot it's in is running at PCIe Gen 3 speeds since it's using the above PCIe Gen 3 upgrade.  (I might consider an upgrade to USB 3.2 Gen 2x2, 20 Gbps in the future).

Also, I'm considering upgrading my LAN to 10 GbE in the future - the additional PCIe Gen 3 x4 slots will allow adding a PCIe Gen 3 x4 add-in card to the 435T for that.