Crosshair 5 cpu voltages in bios vs. AI suite?

[Guitarmageddon]

Okay, so I have been messing around with my OC in the bios only until I figured I might try messing with it in windows in the AI suite program.

system: crosshair 5 formula
1100t
h50
ati 5870
gskill 1333 at cl777 21

I have noticed a few strange things. I am stable at 4.01ghz at 1.452v with 2800nb and ram stock. Any time I try to go higher and bump up freq/voltage in the bios, it DOES change the cpu freq, but DOES NOT change the vcore, it keeps it at 1.452. Is this just a bios flash issue (using initial bios that came with board)?

Also, how come everest tells me accurate temps, but asus ai suite tells me my cpu is 30 degrees all the time no matter what? it happens to show accurate MB temps, but for whatever reason not the cpu.

Any oppinions?

oh, and to everyone who got bum boards for their first ones, I am part of that club too. I RMA'd it within 2 hours of recieving it. more bsods than I knew existed, red lights, etc....the works. This one is good though, knock on wood.

[Raja@ASUS]

Hi,

You may need to set the voltage yourself if you need more than 1.452V

AI Suite probably reports from a different temp diode. Use whatever you prefer for temp monitoring - the AMD temp diodes don't seem to be terribly accurate at the best of times. I personally use AOD.

-Raja

[Guitarmageddon]

Just the person I was hoping to get a response from, thanks. I have another issue, however. When setting a voltage in the bios, it shows differently in CPU-Z and have been fluctuating as much as .02 or so volts at idle. What does this indicate? Is this what LLC is supposed to prevent? what part of the bios do I change that in? I believe this is what is preventing me from getting to 4.1 from around 4.03 now.

I just set the vcore to 1.493 in the bios, but cpu-z is saying 1.464 no matter what I change it to, but asus probe is saying it is the bios value. which one is correcT?

[xeromist]

Yes, Load Line Calibration is intended to minimize fluctuations in voltage. I'm not sure where it is in your BIOS, but my experience has been that it's on the same screen as the CPU voltage adjustment, sometimes one screen above it.

[Raja@ASUS]

Just the person I was hoping to get a response from, thanks. I have another issue, however. When setting a voltage in the bios, it shows differently in CPU-Z and have been fluctuating as much as .02 or so volts at idle. What does this indicate? Is this what LLC is supposed to prevent? what part of the bios do I change that in? I believe this is what is preventing me from getting to 4.1 from around 4.03 now.

I just set the vcore to 1.493 in the bios, but cpu-z is saying 1.464 no matter what I change it to, but asus probe is saying it is the bios value. which one is correcT?

Make sure you have the latest version of CPU-Z installed.

.02 voltage fluctuation is nothing to be concerned about. Voltage sag is inevitable, what is more important is that the voltage is at the correct level when the processor is loaded. LLC sets varying levels of feedback gain and voltage offset from the applied VID. There is no VRM that can react instantaneously to a load transient - some are better than others but there is always some form of sag and recovery overshoot. It's a complex thing to understand and explain which is the main reason there is so much misconception about vdroop. Lastly, software monitoring is not accurate enough to asses the quality of a VRM.

-Raja