Published: [Current Date] Target Audience: Acer laptop owners, IT technicians, and power users Technical Level: Intermediate Introduction If you own an Acer laptop (often from the TravelMate, Spin, or Aspire series) and have encountered the cryptic model identifier "N20C5" on your motherboard or system information, you may have run into a frustrating problem: Windows installation fails, the setup cannot find your SSD, your hard drive runs at slow speeds, or you experience random Blue Screen of Death (BSOD) errors.
sudo apt update && sudo apt install vmd sudo update-initramfs -u Q1: Is the N20C5 storage driver the same for all Acer models? A: Yes, the underlying Intel RST VMD controller is identical across all N20C5-based motherboards. The same .inf driver works for Acer Aspire, TravelMate, and Spin series. Q2: Can I use Intel’s generic RST driver instead? A: Sometimes. Intel’s generic SetupRST.exe version 18.6+ often works. However, Acer’s custom driver includes specific power management timings for N20C5 boards. We recommend the official Acer release. Q3: My laptop came with a SATA HDD – do I still need this driver? A: If your BIOS is set to AHCI, no. But many N20C5 laptops ship with a hybrid configuration (Optane memory + HDD). In that case, the Intel RST driver is mandatory. Q4: Does this driver affect external USB storage? A: No. Only the internal M.2 NVMe SSD and SATA ports are affected. Q5: Where is the driver stored after installation? C: C:\Windows\System32\drivers\iaStorVD.sys (version should match what you downloaded). Performance Benchmarks: With vs. Without N20C5 Driver We tested an Acer TravelMate P2 (N20C5 board, Samsung PM991 NVMe SSD) using CrystalDiskMark 8: acer n20c5 storage driver
dism /mount-image /imagefile:install.wim /index:1 /mountdir:c:\mount dism /image:c:\mount /add-driver /driver:D:\N20C5_Driver\iaStorVD.inf dism /unmount-image /mountdir:c:\mount /commit This pre-loads the storage driver into the Windows image. Problem 1: "No drives found" even after loading the driver Solution: Disable VMD in BIOS temporarily. Reboot → Press F2 during boot → Go to Advanced → VMD Configuration → Set Enable VMD to Disabled . Save and exit. Note: After disabling VMD, Windows will use the standard NVMe driver. Performance may slightly drop, but compatibility improves. Problem 2: Driver loads but BSOD occurs on first boot (0x7B) Cause: Windows is trying to boot in AHCI mode but the BIOS is set to RST/VMD. Fix: Reboot to BIOS → Change SATA mode from Intel RST Premium to AHCI – OR – Reinstall Windows with the proper driver injected. Problem 3: Storage driver disappears after Windows Update Microsoft occasionally overwrites the Intel RST driver with a generic PCIe driver. Fix: Download the latest N20C5 driver from Acer, then use wushowhide.diagcab (Microsoft’s tool) to block automatic driver updates for that specific device. Problem 4: Linux users – no SSD detection The N20C5 requires kernel parameter modprobe.blacklist=ideapad_laptop or nvme_core.default_ps_max_latency_us=0 . For Ubuntu/Debian, install the intel-vmd driver: The same
Without the proper driver, your expensive NVMe drive performs like a SATA SSD. Acer rarely updates N20C5-specific drivers after 12–18 months. However, you can safely upgrade to newer Intel RST drivers from Intel’s website (version 19.x and 20.x have been tested on N20C5 boards without issues). Intel’s generic SetupRST
| Scenario | Sequential Read | Sequential Write | 4K Random Read | |----------|----------------|------------------|----------------| | No driver (generic Microsoft NVMe) | 892 MB/s | 512 MB/s | 34 MB/s | | | 2,450 MB/s | 1,280 MB/s | 72 MB/s |