i9-7980XE OC and XMP issues
i9-7980XE OC and XMP issues
Hello.
Here is my setup:
- Asus Rampage VI Apex
- i9-7980XE processor
- G.Skill Trident Z DDR4 4000MHz F4-4000C18Q-32GTZKW
- GPU: 1070ti
- PSU: Seasonic Prime Ultra Titanium 850W
- Custom liquiq cooling with ekwb monoblock
My usage:
- OC not too extreme, 4.1-4.4 all cores for stable performance.
- Stress tests on AIDA CPU always pass without issues.
- After turning off USB Legacy support, memory tests also succeed.
- Cache tests consistently fail—sometimes stops with an error, other times with BSOD.
- When running Cinebench r15, the system shuts down immediately.
- Memtesting over five hours showed no errors.
- After adjusting defaults, problems disappeared.
- Conclusion: difficulties during overclocking.
What I have tried:
- XMP profile
- DRAM timings and voltage adjustments (same as above + small offset for CPU and cache)
- Manual ratios per core + custom DRAM settings
- Lowering DRAM frequency
- Various other tweaks…
But nothing resolved the issue.
With SyncAllCores option, I still can’t pass the test; with ByCoreUsage it seems different.
I don’t need fine-tuning—please advise which direction to focus. Possible causes: insufficient voltage? Maybe the PSU needs checking? Or should I adjust frequency? Any suggestions or hints would be appreciated. Thank you.
It doesn't make sense for a lower frequency to fail. Have you got the newest BIOS? You might want to try one or two modules at a time to check if it works.
It doesn't make sense for a lower frequency to fail either. Do you have the most recent BIOS? Try one or two modules at a time to check if it works.
Yes, chipset drivers and BIOS are up to date.
I conducted additional tests and here are the outcomes:
All tests were carried out with these configurations:
LLС: 1
Intel Speedstep: disabled
spread spectrum: disabled
SVID Support: disabled
CPU and DRAM capability: 140%
1. XMP profile, Core Ratio: Auto with option Sync All Core which actually corresponds to 4400 for all cores.
Cinebench succeeded, but the render test failed since avx instructions were used at startup, causing a temperature spike to 105°C, which likely triggered protection and a reboot.
2. Same as point 1 plus AVX offset 3 = 4100-4400 depending on the task.
Cinebench and Blender passed, but the Aida64 cache test ended with an error after 12 seconds.
3. Max Core Ratio: 42, AVX offset 3 = 3900-4200, cache and system agent voltage: 1.1
Cinebench and Blender passed, while the cache test stopped with an error after 11 minutes.
4. Increasing RAM or cache voltage did not yield results.
I used a processor diagnostics tool from Intel. All tests completed without issues. I ran memtest for 5-6 hours with no errors.
Could this behavior indicate a potential issue? Or should we disregard this test?
I can provide another example.
Most people are familiar with streaming tools like OBS or XSplit. The encoder settings remain identical, yet XSplit occasionally causes blue screens, particularly when paired with a CPU multiplier of 44. However, OBS is unaffected. Streaming tasks also fall under rendering processes. Perhaps there’s a subtle clue here.
Thanks.
I have noted additional details about the recent experiment. The results remained stable across settings between 3900-4200 for all cores. For consistency, I kept the frequencies unchanged while excluding memory voltages from auto-adjustment. Since there was no time to conduct lengthy tests, a single test lasting over 20 minutes completed without errors. It appears that issues arise when attempting to increase the multiplier or decrease the offset (raising frequency for avx).