Originally Posted by dlee7283;12984206
...core leveling values to both -6,-6 to work
Can someone explain what these +/- values mean?
A TA790XE, with Propus 620. To the best of my recollection (Didn't keep the logs as I should have):
Core leveling is one of the settings I tinkered around with, once I had achieved a modest, stable overclock - let's say in the neighborhood of 3GHz, 1.225V. Plenty of P95 Torture Test, and P95 pretty much always running - if there is a problem, there will eventually come a "round-off error".
I had worked up to there with Core Leveling set to "Auto." When I set CL to "All Cores" and "0", the stress test failed. The same core failed several times, so I presumed it to be the weakest, and set that core to "-2" or "-4", and the system could again survive a stress test. **
Unless, of course, I'm off 180 degrees and set the problem core to "+2" or "+4". I think I decided that CL was reducing load
on the core ("-" for stability), but perhaps it was tweaking voltage or something (i.e. "+" for stability).
I don't have the tools to measure these effects. But I am certain that, if one sets the right conditions (e.g. a system on the edge of stability), and runs a test that isolates each core, one can see the effect. If your CPU is anywhere near its limit, set one core to "-12" and then run p95 to see if that core bites the bullet.
Also, one might learn something by taking that same scenario, and adjusting the other
cores, instead. I'm sure I tried this, but again, this is from memory, and I don't want to mislead you with a bunch of made-up sh**
I hope this helps, and please, share anything you learn. If I discover anything more concrete, I will post it here. (I am now using a TA790GXB BS sent to replace the XE, and I'm experimenting with undervolting. We're stable at 2200MHz, 1.0125V. -Maxing out at 35/38 Celsius, with AC Freezer Pro cooler - about 30C ambient. Perhaps now's a good time to reboot and fiddle with CL.)