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richiegore
Limp Gawd
- Joined
- Feb 1, 2017
- Messages
- 322
Both of these were correct! Thanks! Followed the instructions in this video to figure out where to disable it in the ASUS BIOS and to get some more background on the issue:
The TDP "boosts" to 122W for a max 28 seconds according to the Intel Extreme Tuning Utility. During these periods of boost, I'm seeing all of the cores at 4.6 GHz instead of 4.3 GHz, which is what I would expect. The maximum temperature after running a few tests (CPU and Memory tests) show a running average of 76 deg C, and a max around 84 Deg C. So That makes me feel better about the delid and cooling solution I have in place.
However, this issue now has gone almost completely the other way in that I cannot get a sustained 4.3 GHz across all cores as I would expect a standard i7-8700 to do. Now with MCE disabled and when it's not in this 122W boost period, it comes down to 65W TDP as expected, but the speed seen on the cores bounces around 3.83 GHz to 4.03 GHz. "Power Limit Throttling" is the reason that the Intel ETU is flagging. If the i7-8700 is rated for 4.3 GHz across all cores in "normal TDP operation", what could I have set incorrectly for not being able to sustain 4.3 GHz? So now that I know where the MCE function is and what it does I may see if tried to see if I could tweak it to get a decent clock just above TDP that would then not overload my cooling solution. After a significant amount of playing around with bios settings trying to figure this out, I ran through the following scenarios:
So now I'm a bit lost what to do and how to set the bios as I have no experience overclocking, but willing to dabble and learn. I want XMP enabled and the CPU to sit at 4.3 GHz on all cores, but don't know how to set this up without seeing large temp gains (ie. with the 5-way opt utility). I would like to start off with the default bios settings with no MCE and XMP enabled, and then boost voltage or the TDP maximum just a bit to see if I can get a stable 4.3 GHz multi-core clock with no more than a 10C rise from my current 76C measure. Any guidance would be appreciated. I'll probably post this issue on the ASUS ROG forum to see what I should be looking at in the bios for a nice half-way point.
- Disable MCE with XMP enabled - Temps are good, avg around 76C as above, can run forever like this but I never have long periods of sustained 4.3 GHz on the cores. Constant Power Limit Throttling.
- Disable MCE and XMP - Really no change (marginal if anything). Temp still avg 76C and heavy power limit throttling. I was expecting to see more change here given that XMP is an overclock, and more power would be available if the memory sits back where the CPU is designed for.
- Reload Defaults and disable MCE - No change beyond the above.
- Perform 5-Way optimization as per the Asus Bios Utility - This seemed stable, but the temps were on average for a 5min load test around 98C peaking at 101C and on the verge of the thermal limiter. This had boosted the reference clock to 102.50 MHz. So next step was to try scaling this back to stock....
- 5-Way optimization with ref clock at 100MHz - Marginal temp decrease, maybe an average of 96C and creeping upward. Still too high for my comfort.
Processor base frequency is 3.2GHz on intel website.
I would think only synthetic loads will push the cores down 3.8-4.0. everything else should be perfect. That said you should be able to gradually up the TDP setting until you get a good balance between clock speed and temps.
