2019 15" Lenovo ThinkPad X1 Extreme Gen 2 (GTX1650) [9th,6C,H] + RX 5700 XT @ 32Gbps-TB3 (AKiTiO Node) + Win10 & Linux Ubuntu 20.10  

I'm back on the EGPU scene after a 4 year hiatus, last build was here. 14" HP 8470P + GTX770@4Gbps+c-EC2 (PE4L 2.1b) + Win8.1 [ jakethesnake438] - Implementation Guides - PC - Tech|Inferno Forums

This X1 Extreme has given me some headaches, but most of them were to do with the Lenovo drivers suite

I was having major issues in BF5, where the CPU was pinned at 100%, this was resolved by disabling IGPU and closing the internal screen

System specs:

• Lenovo X1 Extreme Gen 2, removed mesh on air intake for better airflow
• 2.6 GHz Intel Core i7 9750H (Liquid Metal) Happily sits at 90deg C @ 3.990ghz, ambient ~21 deg C
• 32GB 2x16 2666mhz Ram
• Intel HD Graphics + Nvidia GTX 1650 Max-Q

eGPU Hardware

• Akitio Node 400w
• MSI Reference 5700 XT
• Included 30CM TB3 cable
• Dell P2715Q 4K Display

Setup

• Install Win 10 20H2 Fresh from MS site, don't use Lenovos recovery
• Disable Thunderbolt security in BIOS
• Install drivers manually from Lenovo. Key driver is the Intel Thermal Platform driver, this enables CPU to break 80deg C soft limit
• Don't enable Hyper-V or any WSL support, this causes issues with windows writing to some thermal related registers as referenced here
• Install forked version of TPFanControl from here
• Install AMD Driver 20.4.2, performance issues with later drivers
• Close internal screen (for improved BF5 performance)

Tuning with throttlestop:

• Undervolted @ -200.2 Core, -150 Cache, -90 SA,
• IccMax @ 255.75A
• Disable and Lock Turbo Power Limits
• Turbo power long max at 80w
• Short power max at 90w
• PL4 130
• PP0 ignored

Performance:

• Cinebench R20: 3107, fastest score I could find online
• Battlefield 5: > 60fps @ 4k Low on multiplayer
• Battlefield 4: > 80fps @ 4k High on multiplayer
• Ungine Superposition 1080p Extreme: 4546
• Ungine Superposition 4k Optimized: 6254
• More to come