Incorrect latency values detected for TRX40 with 3960X and B450 with 3800X systems
Incorrect latency values detected for TRX40 with 3960X and B450 with 3800X systems
Hello. I'm just starting with AMD CPUs and used Intel until recently. This issue has never come up before. I have two different systems and both are experiencing the same problem. The timings reported by each computer are one higher than what's configured in the BIOS. I've tried adjusting the timings manually in the BIOS and in Ryzen Master, both individually and together, but it didn't help. This is happening with my Workstation PC setup: Gigabyte TRX40 Master, Threadripper 3960X, and G.Skill 3600MHz (15-15-15-35). Ryzen Master and CPU show 16 -15-15-35 timings. According to CPU-Z validation, the settings are correct. My mITX gaming PC uses Gigabyte B450-i + 3800X + G.Skill 3200MHz (14-14-14-34). Ryzen Master and CPU-Z report 15 -14-14-34 timings. The mITX build that used an Asus B450 ITX board also had incorrect CAS settings, even though it worked fine on Intel 8700K and 7960X systems. I also tested the 3200MHz kit on a 9600K system, and it functioned properly there too. I'm not concerned about performance loss, but this seems like an unusual problem. Any suggestions?
When gear down mode is active, odd numbered CAS values will be rounded up.
It functions correctly now that GDM is enabled. It improves stability though it can't handle irregular CAS latency counts. It will increment the value by one automatically.
Gear down mode isn't active. Verified multiple times, my B450 board shows an irregular CAS value instead of the expected even one. Definitely not gear down.
I attempted to adjust the memory settings to 14-14-14-34 on the TRX40 board to bypass gear issues, but it didn’t respond. Restarted it with 16-15-15-35.
It seems you're experiencing a strange configuration with your setup. I noticed the gear is off, yet it's showing GDM enabled, which should result in an even CAS. This usually happens with powerful 16GB RAM kits, like the one you mentioned.
After experimenting with this, it looks like the issue lies with gigabyte. It doesn’t respond to any BIOS adjustments. It behaves unpredictably regardless of settings like CAS value, manual DRAM frequency, etc. The system boots up consistently every time. In short, if you're considering buying from gigabyte, think twice. My 3600MHz model is also CL 15 certified, and these chips can run at 12-12-12-24 MHz on an Intel platform without problems.
It seems those components will handle Cas 12-12-12 at 3600mhz and Cas 14 at 4000mhz. I saw in your earlier message that the previous assessment for your B450-I ROG board was incorrect. Did this problem get resolved? It doesn’t seem to be happening now. Gear Down mode functions properly. For Gigabyte, my opinion is unclear. I haven’t used any of their boards since the 990FX UD7.