Attempting to achieve XMP stable on AM5 Mobo
Attempting to achieve XMP stable on AM5 Mobo
Hi there, here are the details I posted:
Model: MOBO: GIGABYTE - B650 AORUS ELITE AX
Processor: Ryzen 5 7600X
Memory: CORSAIR - VENGEANCE 32GB 6400MHz PC5-51200 DDR5 C32 DIMM
I attempted to set up EXPO in my BIOS but only found the XMP1 option. After searching Gigabyte's site, I realized it might be because my RAM isn't "EXPO compatible" for this motherboard. I also thought XMP could work on AMD, but it caused frequent crashes. Could there be a simpler way to manually adjust XMP for better stability? No need to hit full 6400MHz, just a little improvement would help.
Thanks!
Hey there,
Generally, each mobo has a QVL and a list of compatible DIMMs that have been tested for compatibility. However, you should verify the BIOS you're using (CPU-z) and confirm it's current. The newest version will include improvements for RAM compatibility.
Make sure to reset CMOS after updating the BIOS to ensure proper recognition, then attempt XMP again.
Alternatively, you might consider manually configuring the RAM through its XMP settings within the BIOS.
Tell us how it turns out.
Most memory modules include XMP rather than EXPO. The timing differences between XMP and EXPO can appear slightly varied even when running at the same clock speed, as adjustments are made to suit the specific traits of Intel and AMD chips.
You might consider these steps:
- Turn off XMP and start the computer using its default DDR5 frequency.
- Employ a diagnostic tool to examine the SPD values in the DIMMs and create a backup of all timings under both regular and XMP configurations. Be prepared to record several settings.
I typically use AIDA64 to view the SPD details, though other programs can serve the same purpose.
At each speed setting, you'll encounter a lengthy list of timing numbers separated by hyphens. These represent the Primary, Secondary, and Tertiary timings, starting from CL-RCD-RF-RAS.
Note: You must double the frequency shown in AIDA64 to determine the actual DDR5 rate. For example, 2400MHz in Aida64 corresponds to 4800MHz DDR, which is the standard speed for DDR5.
A basic BIOS can extract the highest XMP value from the SPD (such as 6400MT/s), but if this fails, options are limited. A more advanced BIOS offers a wider range of XMP configurations.
If possible, your Gigabyte BIOS might let you pick a slower XMP setting, like 6200, 6000, 5800, 5600, 5400, 5200, or 5000MT/s. Begin at a low speed—around 5000MT/s—and if stability is achieved, gradually increase. Always perform a stress test at each frequency.
Occasionally, you can manually adjust the Primary timings in the BIOS to stabilize the overclock. Start with CL (CAS) and try increasing it slightly if needed. The goal is to keep most of the XMP values intact while slightly relaxing critical ones. For instance, change from 40-40-40-77 to 42-40-40-77 at 6400MT/s.
Upgrading to XMP can raise the DDR5 voltage from 1.20V to 1.35, 1.40, or 1.45V. Higher voltages demand more heat, so you'll notice the XMP timings become tighter compared to standard settings at the same speed.
In rare cases, you may need to manually configure each DIMM's memory timings in the BIOS, ensuring they align with your chosen speed. You'll also have to raise the voltage to 1.35V or higher if using XMP. Avoid exceeding 1.50V on DDR5.
The extent of overclocking you can achieve hinges on both the hardware and your skill in fine-tuning. Many overclocking guides are available online, but aim for 6400MT/s as a realistic target rather than expecting guaranteed results out of the box.
In conclusion, I test my 2 x 32GB (64GB) RAM on a 7950X at 4800MT/s for stability. Performance improvements from faster RAM are minimal, typically only a few percent.