I'm a former Intel MB design engineer and have overclocked several other boards, so I feel like I’m not supposed to have to ask questions like this, but here’s what I’ve got.
-ASUS Rampage VI Extreme Encore
Both CPUs run stable at 5.0GHz but the temps peak at 90ᵒC running Cinebench 20, so 5GHz is no good for 24/7 use. To stay below 70ᵒC max, I'm running 101.3 * 47 = 4.76GHz all cores using adaptive mode with an offset of -.012V and AVX offsets at 3. I’ve also tested using static mode at this frequency. Both CPUs sit at 1.2V under heavy load using adaptive mode. Both CPUs can run Cinebench, Realbench, and XTU all day with these settings. At default CPU clock rates I can also run Cinebench all day at 3800MHz 15-15-15-36 without tweaking voltages.
The problem: When the CPU is overclocked as above, turning on XMP at 3800MHz 16-16-16-36 results in Cinebench throwing an error within a couple minutes. However, I can boot and run for 10-20 minutes at 3000MHz with the kit default 17-18-18-38. The latter indicates that the problem isn’t the clock speed or latencies. Tweaking VCCSA and VCCIO up or down doesn’t improve stability, nor does increasing the Core voltage.
I have re-flashed BIOS (latest 0603) and cleared CMOS with both CPUs with no effect.
Suggestions?
-ASUS Rampage VI Extreme Encore
- i9-10940x CPU (14 cores) two different CPUs
- G.SKILL TridentZ RGB DDR4 4266 (F4-4266C17Q-32GTZR 17-18-18-36)
- CORSAIR AXi Series AX1600i PS
- Cooling: custom water loop
Both CPUs run stable at 5.0GHz but the temps peak at 90ᵒC running Cinebench 20, so 5GHz is no good for 24/7 use. To stay below 70ᵒC max, I'm running 101.3 * 47 = 4.76GHz all cores using adaptive mode with an offset of -.012V and AVX offsets at 3. I’ve also tested using static mode at this frequency. Both CPUs sit at 1.2V under heavy load using adaptive mode. Both CPUs can run Cinebench, Realbench, and XTU all day with these settings. At default CPU clock rates I can also run Cinebench all day at 3800MHz 15-15-15-36 without tweaking voltages.
The problem: When the CPU is overclocked as above, turning on XMP at 3800MHz 16-16-16-36 results in Cinebench throwing an error within a couple minutes. However, I can boot and run for 10-20 minutes at 3000MHz with the kit default 17-18-18-38. The latter indicates that the problem isn’t the clock speed or latencies. Tweaking VCCSA and VCCIO up or down doesn’t improve stability, nor does increasing the Core voltage.
I have re-flashed BIOS (latest 0603) and cleared CMOS with both CPUs with no effect.
Suggestions?