SSD NVMe Performance Report on Z890-F Gaming
System Configuration:
- Motherboard: Asus Z890-F Gaming
- Processor: Intel i9‑285K
- Primary SSD: WD_BLACK SN8100 (NVMe)
- Additional NVMe SSDs installed
Issue Observed:
- The WD_BLACK SN8100 is capped at around 12,000 MB/s read speed.
- Other NVMe SSDs are limited to 2.5 – 3 GB/s.
Analysis:
- The Z890 chipset does not appear to provide enough bandwidth to fully utilize multiple NVMe SSDs in parallel.
- The available PCIe lanes are insufficient: the Z890 lacks enough PCIe 4x4 links to deliver optimal performance across several SSDs simultaneously.
- As a result, only the primary SSD reaches high throughput, while the others are heavily bottlenecked by chipset limitations.
Impact:
- Overall storage performance is reduced.
- Secondary SSDs cannot exceed 2.5 – 3 GB/s, which limits workloads such as video editing, large data processing, or multi‑drive setups.
Questions / Request:
- Is there a BIOS or PCIe configuration option to optimize lane distribution and improve performance for secondary SSDs?
- Does Asus plan a firmware/BIOS update to better manage bandwidth on this motherboard?
- Are there recommended workarounds (e.g., PCIe expansion cards, specific slot configurations) to bypass this limitation?
