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Vdroop or not??(LLC) Poll!! - Page 5

Poll Results: Would you have Vdroop on or off?

 
  • 53% (114)
    Vdroop on
  • 46% (98)
    Vdroop off
212 Total Votes  
post #41 of 84
Thread Starter 
im aware of the thread its been around for a while.
i would like to see some evidence if his theory is correct.
but until he has physical evidence to back it up its just a theory.

i would honestly like to see some tests

say:
processor runnnig @ stock
one overclocked and is stable

and

some LLC tests done will be nice also
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post #42 of 84
Quote:
Originally Posted by bluebunny View Post
im aware of the thread its been around for a while.
i would like to see some evidence if his theory is correct.
but until he has physical evidence to back it up its just a theory.

i would honestly like to see some tests

say:
processor runnnig @ stock
one overclocked and is stable

and

some LLC tests done will be nice also



http://www.anandtech.com/cpuchipsets...spx?i=3184&p=5

that might explain a little, look at the pictures for an explanation of what vdroop does.

if you can get a stable OC without LLC, then thats the best. if you need LLC, then just make sure you pay attention to what youre doing
    
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post #43 of 84
so what would i set my vcore to to be stable where i am now with llc enabled? would i just set it alot higher and let it come down during load?

I don't understand why my vcore goes up with llc to be stable, but down without it to be stable?@?@
    
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post #44 of 84
Thread Starter 
Quote:
Originally Posted by IntelConvert View Post
http://www.anandtech.com/cpuchipsets...spx?i=3184&p=5

that might explain a little, look at the pictures for an explanation of what vdroop does.

if you can get a stable OC without LLC, then thats the best. if you need LLC, then just make sure you pay attention to what youre doing
you didnt read my first post lol
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post #45 of 84
i did read the first post, totally forgot you posted that

i had LLC on for my E5200 cause i needed it on to be stable, but i dont have it on for my E8400

i only use LLC if necessary to have a stable OC. other than that, i have LLC off to protect from the voltage fluctuation.
Edited by IntelConvert - 2/17/10 at 12:12am
    
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post #46 of 84
I have vdroop on, because I want maximum performance, and high overclocks, so I disable power saving options and load based clock throttles, so if it ain't changing, I don't want my voltage changing
    
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post #47 of 84
Thread Starter 
Quote:
Originally Posted by Jonesey I7 View Post
so what would i set my vcore to to be stable where i am now with llc enabled? would i just set it alot higher and let it come down during load?

I don't understand why my vcore goes up with llc to be stable, but down without it to be stable?@?@
well in my first post i show how LLC works. but heres some pics to help explain it. (courtesy of anandtech)
with vdroop. notice the vdrop plus vdroop when under load.


now here it is with vdroop. notice the spike before it settles.


i wish you could be more clearer in your question but ill answer it the best i can.
i believe its the idle voltage. if there isnt enough juice just like when under load it can crash
Edited by bluebunny - 2/17/10 at 7:39pm
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post #48 of 84
I had LLC enabled @1.1625 vcore. Passed 2 hours Prime95 small FFT, 20 passes LinX and IBT, and 3 hours OCCT.

Prime95 large FFTs gave BSOD (code 124) after 2 hours. I got prime95 to give BSOD (124) after 20 minutes on a custom test using 4096 size and all memory.

I increased VTT and IOH with no luck. Played with PLL, VDIMM, even ICH voltages until I was not comfortable with how high everything was. Still got BSOD (124) after 20 minutes.

Decided to started from scratch with LLC disabled (Intel specifications).

With a higher Vcore (1.21875 - LinX is awesome for testing vcore) and motherboard set to XMP (everything else AUTO except for BCLK and multiplier - 200 x 19), I was able to pass Prime95 custom (4096 size with all memory) for 10 hours. Idle temps lowered - load temps stayed the same!

Vdroop on for me.

I'm currently running Prime95 small FFT (since 6 hours ago).


Edited by Staged1 - 2/20/10 at 1:09pm
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post #49 of 84
Thread Starter 
nice find staged1.
ive been doing some testing and found out with my specific board that it likes a high idle voltage. but i had some luck with XMP mode and a BIOS flash
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post #50 of 84
Hi all - without getting too much into the weeds, let me see if I can bump this conversation in a new direction.

If you're going to concern yourself with a voltage, let it be the load voltage and not the idle voltage. This is especially true when working with any Intel CPU that makes use of the new PCU (power control unit) functionality, designed to minimize overall power consumption through the use of advanced power-gate technology.

When a chip is at idle, total CPU power is already so low....we're talking 8-10W, even with a very agressive overlock applied. Making a fuss about 0.1V at this point may be the difference in power consumption of 0.5 to 1W max.

Instead, why not focus on the load voltage, where your efforts can gain you real benefit? To do this you need to first remove any concern in minimizing idle voltage - just put it right out of your mind.

Now, if you find that with LLC enabled you end up with a lower, as measured, full load voltage than you would otherwise, I would be very surprised. What typically happens is during the course of optimization you will find the actual full load voltage required for complete stability is slightly higher with LLC enabled, than with it off per Intel specification.

Although this is not the only reason for working within Intel spec when it comes to Vdrop/Vdroop, it's a nice added bonus to say the least.
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