Load Line Calibration?

newbcake

newbcake

newbcake

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Joined
18 Mar 2009
Posts
79
Hey just wondered if anyone uses this feature?

with it enabled i can drop my vcore from 1.35 to 1.30. but temps seem around the same.

any thoughts?
 
I have read that it helps the system stay more stable if you have oc'ed, it depends on mobo how much does it increase the vcore. I had to switch it on my bloodrage as it was increasing my vcore by almost 0.1
 
Last edited:
oggiet said:
I have read that it helps the system stay more stable if you have oc'ed, it depends on mobo how much does it increase the vcore. I had to switch it on my bloodrage as it was increasing my vcore by almost 0.1
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Can actually be the opposite ;)

However, it is very useful in boards with large vdroop.
 
I use it on my p5q deluxe, bios vcore is set at 1.21875, 1.200 windows idle and 1.216 prime load, vid of cpu is 1.200.
 
adamscybot said:
Got an i7 920 clocked to 3ghz (pussy overclock until I get round to it, lol). Do you reckon it could run at default? What is the default anyway?
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It depends on the cpu as they all differ from one another ......... run cpuz and have a look what vcore it gives you. I think if you have D0 its should be fine though
 
Intel make processors assuming load line calibration is not used. The chips are designed around the idea that the more current they draw, the lower the voltage across them goes. By using LLC you are deliberately violating intels specifications on this note.

At the least research it before using it. Anand reported on this, worth a read. I can't replicate his results, but I am very sure that he's right. Electronics do ring like that, and the only way to get a sharp transition is for the ringing to be extensive. It drops out of the fourier analysis which I really didn't like and will have to hope someone else explains. If it's taught in undergrad physics there's a good chance it happens, and I am not willing to subject a processor to extensive ringing (voltage oscillating up and down, up to values significantly higher than the 1.4V you've set in the bios) without good cause.

The other point is a simpler one. High volts and low temps are ok, low volts and high temps are ok. High volts with high temps kills chips. What load line calibration allows is lower voltage while idle, which is when the chip is cold and therefore the time where high voltage doesn't matter very much. This isn't much of a benefit.
 
Certain intel chips apparantly handle loadline calibration better than others, from what i hve researched myself 45nm quads do not work well and you can end up frying your chip. I noticed some really strange voltage activity on my rig with it enabled, running IBT and using everest to check the voltages (as a time related graph) i noticed that during the transition from 100% load to 0% (& vice versa) the voltage could spike to 2.00v or .1v (for a fraction of a second and not everytime but occasoinally) with loadline disabled the vcore alternates from 1.25v to 1.19v in a constant graph as the load changes. there does seem to be a lot of confusion regarding this setting but in my opinion it is best left off.
 
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