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Skylake Overclocking Guide [With Statistics] - Page 194

post #1931 of 11361
Quote:
Originally Posted by Strife21 View Post

So all this talk of using prime95 28.7, it made me feel my 8 hr real bench session wasn't enough. So I ran prime for 14hrs and passed on my 4600mhz overclock with 4200mhz cache. Had to go from 1.31v to 1.32v adaptive voltage and I had to increase my VCCIO up to 1.15v in UEFI but it was a success. LLC at level 5






Ran prime with the same exact settings and it failed after 5 hours this time. Guess its back to the drawing board.
    
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post #1932 of 11361
Quote:
Originally Posted by MoGTy View Post

What are the stock voltages for an i7 6700k chip? Not just the vCore but VCCIO and SA and the like. My chip manages to lose one or two prime95 workers even at stock.

stock core voltages depend on how good your chip is. VCCSA should always be 1.05v and VCCIO should always be 0.95v from what it looks like though.
You need to use Prime version 28.7 or you dont really know where to start looking for problems. Previous versions of Prime95 either have a bug that can cause a failure in the program even with a properly running CPU, or do not support instructions that your CPU has.

Quote:
Originally Posted by MoGTy View Post

I have no clue why they ever implemented vdroop. The way I read your explanation I got this: "CPU asks for 1.4, gets it when doing basically nothing, doesn't get it when it's fully utilized and needs the juice." That makes no sense whatsoever. Sure it might save the chip but why not just lower the starting voltage to begin with so it's nice and low under load and at idle (not taking into account speedstep).

Think of it like an unregulated linear power supply. For a 70v, 5A supply we could have about 90v under no load. But as soon as something starts sucking up power then voltage starts dropping proportional to the amperage draw. Under full 5A load we would be at 70v.
solid state electronics dont *exactly* work the same way, but they do have voltage drop across the device. I'm sure a 14nm transistor has extremely small drop, but it does have some. When the processor is doing nothing and is basically idle then you have voltage high and steady. When the processor gets under load and more transistors are being used then you have more voltage drop because the power is flowing through a few million more electrical devices. The reason Intel does not start requesting increased voltage proportional to the drop to maintain an even voltage is because the voltage regulations and supply cannot react infinitely fast and if the load on the CPU were to drop, say when a task is complete, then the extra voltage the CPU was requesting to compensate would suddenly bring it's voltage too high until the voltage regulation and monitoring saw the now light load and stopped sending extra voltage. This could kill the CPU or damage it at least, it would also over shoot the specified voltage setting. So Intel does not do this for the processors own safety and to keep everything within specifications.


Quote:
Originally Posted by llantant View Post

It's not something they implement. They implement llc to counter act it. The post above me is somewhat correct.

Also use adaptive voltage not manual.

Intel did not implement LLC, motherbaord makers put it in the bios because of ignorant overclocking n00bs who thought their MB is defective and clogged up customer service because they dont understand how their hardware actually works before messing with it. Now, some boards actually did have higher than spec vdroop because they are cheap boards not meant for overclocking and amazing quality. A properly designed board would only have the proper spec of vdroop though. But people want to buy a cheap $100 board and think it is just the same as a $300 board with a few less I/O
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post #1933 of 11361
I wasn't implying that intel invented LLC. redface.gif
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post #1934 of 11361
Quote:
Originally Posted by llantant View Post

I wasn't implying that intel invented LLC. redface.gif

Hello

Intel is the entity that specifies the load line window for the operational range of the processor.
post #1935 of 11361
There's a lot of info in this thread and I'm a little short on time atm, so I apologize if there's an obvious answer to my question already:

I know Skylake's IMC is a beast; should ~3200 MHz DDR4 with XMP on a capable motherboard mess with core voltage/stability at all? Thanks.
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post #1936 of 11361
Quote:
Originally Posted by Praz View Post

Hello

Intel is the entity that specifies the load line window for the operational range of the processor.

But not the options for the Load Line calibration itself.
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post #1937 of 11361
Quote:
Originally Posted by Serandur View Post

There's a lot of info in this thread and I'm a little short on time atm, so I apologize if there's an obvious answer to my question already:

I know Skylake's IMC is a beast; should ~3200 MHz DDR4 with XMP on a capable motherboard mess with core voltage/stability at all? Thanks.

Not with mine anyway. I did ofc have to increase voltage to run 4600mhz cache as the voltage is linked. I believe over 3200 is when you have to start increasing SA and VCCIO etc...

Currently 4700/4600 with 3200 mem 16/18/18/36/1T at 1.37v Core and 1.35 mem. Rest of the voltages on auto.
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post #1938 of 11361
What happens it doesn't boot ? maybe try a bit more voltage perhaps the RAM is a bit " faulty" and needs more voltage, you could always RMA it and say you can't run XMP.
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post #1939 of 11361
i figured it out finnally the cause was the bios version was only 1.1 the new bios is 1.4 DO NOT USE MSI LIVE UPDATE it says there is no update available and that yours is up to date THATS A LIE. soo happy right now biggrin.gif:D
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post #1940 of 11361
Quote:
Originally Posted by EniGma1987 View Post

If you cannot find reliable voltage readings from any of the software you tried then check with a multimeter. That will get you a much better picture of where you are and how the voltage behaves under load on your MB.
I have been wanting to do that actually. My board doesn't have the easy probe-it port that they included on the classified version. I can't seem to find voltage check points that are labeled pretty easily like on some boards either. So I'm not sure where to check to get the vcore? I've seen where people do it from the back side behind the socket but that would be a huge pain..
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