Entering BIOS

1. Restart Your Computer: As the computer restarts, press the key to enter BIOS setup. This is usually Del, F2, or Esc (consult your motherboard manual for specifics).
2. Access Advanced Settings: Navigate to the advanced settings or overclocking section of the BIOS. This might be labeled as “AI Tweaker,” “OC Tweaker,” “Overclocking,” or similar.

Adjusting RAM Settings

1. Find Memory Settings: Look for a menu related to memory configuration or DRAM timing control.
2. Enable Manual Mode: Switch from automatic to manual mode to enable custom adjustments.

Key Parameters to Adjust

1. CAS Latency (CL): The delay time between the memory controller sending a request and the data being available.
2. tRCD (Row Address to Column Address Delay): The number of cycles between issuing the row address strobe and the column address strobe.
3. tRP (Row Precharge Time): The number of cycles it takes to switch to a different row.
4. tRAS (Row Active Time): The number of cycles that a row remains active to ensure data is not lost.

Steps to Adjust Timings

1. CAS Latency (CL): Start by lowering the CAS Latency by one increment (e.g., from 16 to 15). Save the changes and test system stability.
2. tRCD, tRP, tRAS: Adjust these values similarly, lowering each by one increment and testing stability after each change.

Adjusting RAM Voltage

• Voltage: Increasing the RAM voltage slightly can help stabilize lower latency settings. Typical DDR4 voltage is 1.2V. You can try increasing it to 1.25V or 1.3V but do not exceed manufacturer recommendations.

Testing Stability

1. Boot into Windows: After making changes, boot into your operating system.
2. Run Stability Tests: Use tools like MemTest86, Prime95, or AIDA64 to stress test your RAM and ensure stability. Run these tests for several hours to confirm stability.
3. Monitor Temperatures: Ensure your system temperatures remain within safe limits during stress testing.

Fine-Tuning

• Incremental Adjustments: If your system is stable, you can try further lowering timings or increasing frequencies. If unstable, revert to the last stable settings.
• Combining Adjustments: Balance lower latency with higher frequency. For example, if you lower CL, you might also increase frequency for overall better performance.

Finalizing Settings

1. Save and Exit BIOS: Once you achieve stable settings, save your BIOS configuration and exit.
2. Document New Settings: Write down your new timings, voltage, and frequency settings for future reference.

Practical Tips

• Benchmarking: Use benchmarking tools like Cinebench, 3DMark, or UserBenchmark to measure performance improvements.
• BIOS Profiles: If your BIOS supports profiles, save the current configuration to a profile for easy recovery.
• Community and Resources: Join forums like Overclock.net or Reddit’s /r/overclocking to share your settings and get advice.

Example of Adjusting RAM Timings

Suppose your current RAM settings are 16-18-18-36 at 3200MHz with 1.2V. Here’s a step-by-step example:

1. Enter BIOS: Press Del or F2 during boot.
2. Navigate to Memory Settings: Find the DRAM timing control section.
3. Enable Manual Configuration: Switch from automatic to manual mode.
4. Adjust CAS Latency (CL): Change CL from 16 to 15.
5. Adjust tRCD, tRP, tRAS: Change these from 18-18-36 to 17-17-34.
6. Increase Voltage: Set DRAM voltage to 1.25V.
7. Save and Exit: Save settings and restart.
8. Test Stability: Boot into Windows and run MemTest86 for a few hours.
9. Monitor Temperatures: Use tools like HWMonitor to check system temperatures.

If stable, you’ve successfully optimized your RAM latency. If not, revert to the previous stable settings and try different adjustments.