Asus P5Q boards vDroop value and Load Line Calibration adjustment

[GundamF91]

I used to run E4500 on Abit IP35E and Pro boards. With Pro, the vDroop used to be about 0.03v at load, (ie. (BIOS 1.34v drops to 1.31v under load). Even with IP35E and its 3phase power, the vDroop was about 0.05v.

Now with Q9450, I'm running on Asus P5Q-Deluxe, the vDroop is much higher with Load Line Calibration turned off. At 3.2Ghz, I'm setting BIOS vCore as 1.2125v, but at load, the vDroop causes vCore to down to 1.144v, this is nearly 0.07v drop, much bigger than anything else I've seen.

I'm tempted to turn on the load line calibration, even though the Anandtech had said to disable it to reduce the spike between idle and load. I'm wondering if anyone else is seeing such big vDroop.

 

[The Odorous One]

VCore appears to be excellent for my P5Q-E.

Bios setting: 1.4685
OCCT idle: 1.445
OCCT load: 1.465

OCCT Vcore

I am very stable @ 3600 MHz on Q6600.

All voltages in bios are auto except for cpu (1.4685) and memory (2.00).

The board is a dream to OC, no headaches at all. :thumbsup:

 

[GundamF91]

Odorous one, thats' pretty stable. Did you have Load Line Calibration enabled in BIOS? I'm thinking it's enabled. That's probably the reason for it being stable, because the board intentionally offsets the vDroop under load. The vCore load is higher than idle, which wouldn't normally be the case.

 

[The Odorous One]

Yes, it is enabled and obviously doing what it's supposed to do.

From the graph it takes about 10 seconds to ramp up 0.020v, not exactly what I'd call a spike. AT obviously had a different experience.

Could be my boards 8 phase power vs 16 phase Deluxe???

psu is Antec TPQ-850