ASUS updates AM5 BIOS to improve Ryzen stability and memory

ASUS pushed a fresh AM5 BIOS that tweaks memory rules, promises smoother Ryzen behavior, and might quietly tame recent instability complaints.

New BIOS rollout basics

• ASUS launched an AGESA Pre1.3.0.0 firmware for AM5 boards.
• Covers both 800-series and 600-series models.
• Targets security hardening, speed tuning, and general stability.
• Linked to recent Ryzen failure investigations.

What actually changed inside

• ComboAM5 PI_Pre 1.3.0.0 underpins the update.
• Memory compatibility improved for JEDEC DDR5 kits.
• System behavior tightened under edge-case loads.
• No clear admission fixes prior failures.

Memory behavior shake-up

• ASUS introduced M_Ordering, also called Bank Refresh mode.
• Controls how DDR5 refresh paths get enforced.
• Default switched from Normal to Relaxed.
• That shift can break older memory profiles.

Why users are seeing errors

• Relaxed mode enforces timings that were previously ignored.
• Aggressive tRFC values can trigger WHEA crashes.
• Boot loops and app failures become more likely.
• Manual retuning is basically required.

Performance reality check

• Normal mode usually wins for gaming workloads.
• Relaxed may boost synthetic bandwidth numbers.
• Real-world gains often fail to appear.
• Consistency beats marginal benchmarks.

What users should do

• Match tRFC1 and tRFC2 values manually.
• Test stability after every memory change.
• Don’t expect free performance from Relaxed.
• Stick with Normal unless a mixed refresh is needed.