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[Fudzilla]Kaby Lake conjures up two overclocking tricks - Page 6

post #51 of 95
Quote:
Originally Posted by Xuvial View Post

I thought skylake had no trouble hitting 4.8ghz even without delidding just on air.

For short bench sessions yes or a really good one, above average sample for 24/7 use, yes. Average samples hit around 4.5 to 4.6 GHz, some bad samples even as low as 4.4 GHz.
post #52 of 95
Quote:
Originally Posted by Matt26LFC View Post

Two words

No chance lol

That is three.
Five if you say the synonym of lol.
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post #53 of 95
I'll believe those chips can hit 5GHz when I see it wink.gif

Negative offset for AVX sounds more like they are admitting defeat and desperatly trying to get every Mhz out of it
post #54 of 95
Quote:
Originally Posted by Oj010 View Post

5.2 GHz is common from what I've seen. This is turning out to be the spiritual successor to Sandy Bridge that many have anticipated since Ivy Bridge.

Another October pipe dream?
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post #55 of 95
Quote:
Originally Posted by JackCY View Post

No they've upgraded it to 3c/5t.

Hahahaha. This had me dying laughing.
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post #56 of 95
Quote:
Originally Posted by Xuvial View Post

I thought skylake had no trouble hitting 4.8ghz even without delidding just on air.
4.68 GHz is the average out of 92 samples on the Skylake Overclocking Guide spreadsheet.
 
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post #57 of 95
Quote:
Originally Posted by michaelius View Post

Negative offset for AVX sounds more like they are admitting defeat and desperatly trying to get every Mhz out of it

Been used for quite a while in Xeons and exists on consumer BW-E parts already.

It's not an admission of defeat, it's an acknowledgement that some loads are more demanding than others and that a one size fits all clock speed is not efficient.

Take the CPU in my signature system, for example. I generally run it at 4.3GHz, which is my unconditionally stable 24/7 clock, which means I can, to the best of my knowledge, run anything that exists on it without error at that speed. However, the exact same settings are enough for many lighter stress tests and most other apps at 4.6GHz. I give up that 300MHz advantage so that I can run a small handful of apps that have issues at the higher multiplier. With a negative AVX offset, I could have the best of both worlds....4.6GHz 90% of the time, and 4.3GHz for super demanding AVX(2) apps.
Quote:
Originally Posted by Diablosbud View Post

4.68 GHz is the average out of 92 samples on the Skylake Overclocking Guide spreadsheet.

Yep, and many of those aren't 24/7 stable clocks.

Most Skylakes will 'hit' 4.8GHz if all you want are some benchmark results, but if you want a system stable enough to do anything important on for protracted periods of time, the number that can do that at 4.8 is pretty small without exotic cooling.
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post #58 of 95
Quote:
Originally Posted by michaelius View Post

I'll believe those chips can hit 5GHz when I see it wink.gif

Negative offset for AVX sounds more like they are admitting defeat and desperatly trying to get every Mhz out of it
Well many BOINC programmers have stated SSE instructions running faster than AVX on AMD, so hardly defeat rolleyes.gif. I can hit 4.7 GHz FMA3 stable on my 6600K, but only 4.6 GHz on other AVX instructions. It wouldn't be defeat to get my 100 MHz back for running literally anything but prime number searching (don't know of anything outside of scientific/mathematical computation using FMA specifically).

Edit: I realise this isn't for specific AVX instructions, just an example.
Edited by Diablosbud - 7/10/16 at 11:47am
 
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post #59 of 95
Quote:
Originally Posted by The Robot View Post

Overclocker's dream incoming?


The original overclocker's dream was Haswell (as intel officials described it in 2013).
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post #60 of 95
I look forward to overclock settings being even more complicated! ph34r-smiley.gif
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