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Skylake Overclocking Guide [With Statistics] - Page 300

post #2991 of 11361
Quote:
Originally Posted by error-id10t View Post

Advise on the igpu problem has already been given.

1) It down-clocks (throttles) at stock - even at stock everything, yes. I just run it at x20 which is 1000, I'm not gaming so what do I care. The down-clock is from 1150 to 1100.
2) lower your IO/SA. At least try that. My auto values once XMP set them were 1.15v. This is fine but as 99% of people run dGPU they may never even see this "problem". When I manually use 1.1v the problem goes away.

Do both and let us know if the flickering / screen going black goes away.
Honestly, I don't think you're reading the posts or the guide....

I assume you're talking to me, both my VCCIO and SA are below 1.1 already, though I will try downclocking my iGPU which is currently on auto, trying 30 now
Edited by rogergamer - 10/20/15 at 1:11am
post #2992 of 11361
I think so.. sorry forgot to quote. Try setting the value manually also and not leaving to auto.
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post #2993 of 11361
Quote:
Originally Posted by error-id10t View Post

I think so.. sorry forgot to quote. Try setting the value manually also and not leaving to auto.

do you know what's the default non boost and boost ratios? I set it at 30 and it seems to work fine now, but just wanna know what the range was

thanks
post #2994 of 11361
Now that I got my gpu waterblocked I returned to OC testing. Looking like 4.8 might not be possible for me...I've left the DRAM at default 2133 and been up to 1.42 vcore (setpoint, 1.440 actual) with .005 offset and no go.
I have been able to move the cache to 4.5 & the RAM to 3000 without significant adjustments so I guess I'll just be satisfied with 4.7.
After a little more testing I'll revise my submission...I actually haven't tried moving the cache speed any higher, but from default 41 to 45 took no more vcore so it was a "freebie" I guess.

This DRAM I'm using (see sig) was just at $114 at the Egg, I think for a budget it's pretty good bang-for-buck 4x4GB 2666 as for me it's doing 3000 15-17-17-36-CR1 @ 1.3V.
post #2995 of 11361
Quote:
Originally Posted by CC268 View Post

Honestly I would probably put AIDA64 as being easier than booting into Windows. Lol
easier? ... it's different than x264. Guys - there is no one single stress test that is system-wide brutal. Closest is Realbench. x264 is great if you do alot of encoding, but tells you little about cpu i/o, etc. At least on this platform you do not need to test peg/dmi if you run a high BCLK...
the four best IMO: x264 (although x265 is "harder"), HCI memtest, Google Stressapptest, REalbenchv2.4 : cpu core, ram/cache, ram, system-wide
Quote:
Originally Posted by Cyro999 View Post

The point is, i would for one profile if it significantly changed vcore required. It doesn't.

40-50mv isn't a very good rule of thumb because it changes so much with voltage applied; it'll be less if you're already using a low-ish voltage and it'll be more if you're pushing the chip hard. The actual range is huge
you either did not read my post or can't comprehend what it says. .,.. slope change? doh.gif
_________________________________________________________________



@darkwizzie i got a screenie on that rig somewhere, else I'll just do an hour again. no biggie.
Edited by Jpmboy - 10/20/15 at 5:36am
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post #2996 of 11361
I read it, maybe i didn't understand properly
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post #2997 of 11361
I was looking at my setting in the bios and saw that if i put my mouse over the CPU SVID Support option it say that it should be disable when overclocking.

does it make sense or should i leave it to auto ? ?
post #2998 of 11361
Quote:
Originally Posted by Cyro999 View Post

I read it, maybe i didn't understand properly

or I wasn't clear.

The VID lilne is measured at manufacture and depends on the silicon (some imperfections are good tho). For our purposes and operating range, it usually is a biphasic "curve" with a slope change (mV per Hz) at some point where the amount of mV needed per Hz increases - dramatically in some samples, since it becomes nonlinear. The EEs would tell you that this point is where the substrate structure is limiting performance return. Additionally, the load-change induced transient voltage excursion, a 10's of msec spike which decays back to the VID line changes... more. These little buggers cause more degradation than you want to know - called "over/under shoot" in the Product Datasheet - increase in magnitude and duration and are the reason for vdroop on critical rails subject to it. Defeating vdroop on an overclocked 24/7 rig is not the best way forward (benchmarking - sure). Frankly, I've never come across a situation where the only way to provide the necessary voltage under load is by defeating vdroop.

Each chip sample is different (until the day when we can grow perfectly uniform substrate), so the rule of thumb is general, like any rule-of-thumb. For example, my 6600k runs 4.5@1.390V, 4.6@1.435V, 4.7@1.488V, 4.8@ is >1.55V (boots and benches 4.8 at 1.51V, but no stress testing). Looks "linear" up to 4.7.

it's not a normal sample tho: Warning: Spoiler! (Click to show)

thumb.gif
Quote:
Originally Posted by mrdouble99 View Post

I was looking at my setting in the bios and saw that if i put my mouse over the CPU SVID Support option it say that it should be disable when overclocking.

does it make sense or should i leave it to auto ? ?

Auto/enabled for adaptive or offset (the cpu and vrm need to communicate). With fixed/manual, you do not want the two of them talking. wink.gif
Edited by Jpmboy - 10/20/15 at 7:39am
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post #2999 of 11361
I was obviously joking about it being easier than booting into Windows...but to put this in perspective...if I went off of AIDA64 I would be at 4.6GHz and 1.28ish V. With Realbench/x264 I am currently at 1.315V and 4.6GHz. Huge difference there. If I go by AIDA I won't last 5 minutes with RealBench or x264...so it almost isn't even worth my time to test with AIDA.
Edited by CC268 - 10/20/15 at 8:02am
    
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post #3000 of 11361
Quote:
Originally Posted by Jpmboy View Post

or I wasn't clear.

The VID lilne is measured at manufacture and depends on the silicon (some imperfections are good tho). For our purposes and operating range, it usually is a biphasic "curve" with a slope change (mV per Hz) at some point where the amount of mV needed per Hz increases - dramatically in some samples, since it becomes nonlinear. The EEs would tell you that this point is where the substrate structure is limiting performance return. Additionally, the load-change induced transient voltage excursion, a 10's of msec spike which decays back to the VID line changes... more. These little buggers cause more degradation than you want to know - called "over/under shoot" in the Product Datasheet - increase in magnitude and duration and are the reason for vdroop on critical rails subject to it. Defeating vdroop on an overclocked 24/7 rig is not the best way forward (benchmarking - sure). Frankly, I've never come across a situation where the only way to provide the necessary voltage under load is by defeating vdroop.

Each chip sample is different (until the day when we can grow perfectly uniform substrate), so the rule of thumb is general, like any rule-of-thumb. For example, my 6600k runs 4.5@1.390V, 4.6@1.435V, 4.7@1.488V, 4.8@ is >1.55V (boots and benches 4.8 at 1.51V, but no stress testing). Looks "linear" up to 4.7.

it's not a normal sample tho: Warning: Spoiler! (Click to show)

thumb.gif
Auto/enabled for adaptive or offset (the cpu and vrm need to communicate). With fixed/manual, you do not want the two of them talking. wink.gif

So if my Vcore is set to manual, i need to keep CPU SVID Support to auto ?
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