Many users report that even with the correct 2.1.39.0 driver, the uPD720200 chipset is capped around 100-150MB/s, failing to reach true 5Gbps speeds. This is often a limitation of the older chipset's interaction with modern PCI-e lanes rather than a software issue. 3. Update the Firmware
Windows Memory Integrity features block older legacy xHCI drivers from loading due to virtualization security protocols.
Windows XP, Vista, 7, 8, 8.1, and 10/11 (via compatibility modes).
The "XH-39.0" refers to version 2.1.39.0 of the Renesas Electronics USB 3.0 Host Controller driver. It is designed to act as the bridge between your operating system and the hardware on the PCI-e expansion card. Target Chipsets: Renesas/NEC uPD720200 and uPD720200a. xh-39.0 driver
Non-responsive USB ports, power delivery without data link, dropping connections HVCI (Hypervisor-Protected Code Integrity) / Core Isolation Step-by-Step Resolution Strategies
Go to . Turn off Memory Integrity . Restart your computer and reinstall the driver. 2. Slow Speeds (100MB/s Limit)
The XH-39.0 moniker belongs to internal hardware kits pairing a physical PCIe bridge card with an integrated microcontroller. Many users report that even with the correct 2
Outdated drivers are a leading cause of the "Blue Screen of Death" (BSOD). Version 39.0 includes patches for memory leak issues found in previous iterations.
Ensuring low-latency communication for axis movement.
Forcing Windows to strip away cached .inf installation blueprints ensures that underlying hardware configurations can initialize cleanly. Update the Firmware Windows Memory Integrity features block
If you are seeing "Code 39" specifically, it indicates the driver is missing or corrupted. Disable Memory Integrity
The XH-39.0 driver is the backbone of your hardware's communication capability. By ensuring you are running the latest version and following a clean installation path, you can maximize the lifespan and efficiency of your equipment.