SVID and LLC Settings
3.1 Key BIOS Settings
PDF · 9Page 9These names are from ASUS Z790 BIOS. The values belong to the example discussed here; the explanations distinguish the tuning principle from details of the historical export. Submenu paths may change between BIOS revisions.
| BIOS setting | Example / manual | Purpose and caveat |
|---|---|---|
| SVID Behavior | Auto | The manual uses Auto following my later clarification. This ASUS policy depends on the BIOS; when AC/DC are set manually, verify the applied values. |
| CPU SVID Support | Enabled | Keeps SVID control and communication active. |
| Actual VRM Core Voltage | Auto | Does not set a fixed Manual/Override target for the external Vcore VRM. |
| Global Core SVID Voltage | Auto | No global offset is specified. This does not mean that the entire platform uses Intel Defaults. |
| Cache SVID Voltage | Auto | Applies no manual adjustment to the Ring/Cache voltage request. |
| CPU Load-line Calibration | Level 5 | LLC for the VCCCORE rail. After changing the level, set DC using Table 3.2 and repeat AC tuning. |
| Synch ACDC Loadline with VRM Loadline | Disabled | Automatic matching is disabled; still verify the selected AC/DC values after boot. |
| IA AC Load Line | 0.35 mΩ | The value in my working profile, not a universal starting point. |
| IA DC Load Line | 0.73 mΩ | The DC value adopted for LLC5 from Table 3.2; verify that it is applied after boot. |
| IA VR Voltage Limit | Auto | No separate limit is set in this example. This limit neither measures nor rules out fast overshoot; it does not replace light-load testing. |
| Voltage Monitor | Die Sense | Voltage sensing at the CPU. On this board, Vcore is compared with VOUT; other boards must be checked separately. |
| UnderVolt Protection | Disabled in the export | Not a required part of AC undervolting. For a new baseline, Enabled is preferable, with verification that the BIOS settings take effect. |
The TXT dated August 28, 2026 records SVID Behavior = Trained. The recommendation later changed to Auto; no new hardware run followed. The TXT and video document the earlier profile.
3.2 LLC4, LLC5, LLC6 and LLC7
PDF · 10Page 10For ASUS motherboards with an IA DC Load Line setting, this method adopts the LLC/DC mapping in the table below. Applying it to all such ASUS boards is an assumption of the method, not a proven characteristic of every model. These numbers do not automatically determine AC.
| LLC | DC, mΩ | Practical Behavior | What to Do with AC |
|---|---|---|---|
| Level 4 | 1,00 | More droop than LLC5; different behavior during load transitions | Retune AC. Do not carry over the minimum AC from another level. |
| Level 5 | 0,73 | The level used in my main working example | My profile uses AC 0.35 mΩ. This is an individual result, not a general AC preset. |
| Level 6 | 0,49 | Less steady-state droop; different transient response | Repeat AC tuning. A lower AC number does not guarantee better efficiency or stability. |
| Level 7 | 0,24 | Even stronger droop compensation; not a target simply to obtain flat Vcore | Do not treat it as equivalent to LLC5. At the lowest available AC, do not add another undervolt without separately validating the baseline. |
Switching to Another Level
Save the Starting Point
Record LLC, AC/DC, voltage settings, limits and the result of the same workload.
Select LLC and Set DC
For LLC4/5/6/7, set DC to 1.00/0.73/0.49/0.24 mΩ, respectively. Disable Synch ACDC for independent AC control; verify after boot that the values have taken effect.
Start from a Reproducible Baseline
Do not start immediately at the previous minimum AC. AC = DC can serve as a reference configuration, but does not guarantee correct voltage or an absence of overcompensation.
Repeat Tuning and Testing
Compare voltage, power and the result, then test heavy, light and varying loads. Changing LLC changes more than a single steady-state VOUT number.