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[MT] Intel Admits That Ivy Bridge Runs Hotter Because Of 22nm Shrink - Page 7

post #61 of 183
4/30/12 at 12:10pm
Quote:
Originally Posted by icehotshot View Post

It seems as though 32nm was the sweep spot for heat dissipation. And until Intel finds a way to force the heat out of the densely packed 22nm cores better, they will remain hotter. It really isn't Intel's fault, it is thermodynamics fault.

It's NOT just chip density.... leakage is a big function of heat as well. Without knowing how "leaky" the transistors are, we cannot really say the impact on density so clear cut.
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post #62 of 183
4/30/12 at 12:17pm
Quote:
Originally Posted by DuckieHo View Post

It's NOT just chip density.... leakage is a big function of heat as well. Without knowing how "leaky" the transistors are, we cannot really say the impact on density so clear cut.

The whole point to 3d transistors is so that they have LESS leakage.........so I'm pretty sure it is the chip density.
Quote:
Intel's 3-D Tri-Gate transistors enable chips to operate at lower voltage with lower leakage

source
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post #63 of 183
4/30/12 at 12:34pm
Quote:
Originally Posted by icehotshot View Post

The whole point to 3d transistors is so that they have LESS leakage.........so I'm pretty sure it is the chip density.
Quote:
Intel's 3-D Tri-Gate transistors enable chips to operate at lower voltage with lower leakage
source

Their silicon is still immature, as in their probably B# or C# stepping. Any change in the letter means theres a major silicon revision that took place. I remember they matured the 32nm Clarkdale to the O# stepping
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post #64 of 183
4/30/12 at 12:38pm
Quote:
Originally Posted by icehotshot View Post

The whole point to 3d transistors is so that they have LESS leakage.........so I'm pretty sure it is the chip density.
Quote:
Intel's 3-D Tri-Gate transistors enable chips to operate at lower voltage with lower leakage
source

That was a press release from a year ago.... It is not a technical document and it was before the mass production. We all already know that Intel has difficulties and delays.

Yes, FinFETs will reduce leakage. However, the fact of just having FinFETs does not guarantee lower leakage. I am willing to bet the current process is currently leakier than Intel targeted. New processes always are leaky at first and get less so as it gets more mature.


Quote:
Originally Posted by BizzareRide View Post

Their silicon is still immature, as in their probably B# or C# stepping. Any change in the letter means theres a major silicon revision that took place. I remember they matured the 32nm Clarkdale to the O# stepping
Exactly. Intel has 15 major revisions of 32nm!?

What's IVB launching at? E?
Edited by DuckieHo - 4/30/12 at 12:41pm
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post #65 of 183
4/30/12 at 12:59pm
Quote:
Originally Posted by DuckieHo View Post

Quote:
Originally Posted by icehotshot View Post

The whole point to 3d transistors is so that they have LESS leakage.........so I'm pretty sure it is the chip density.
Quote:
Intel's 3-D Tri-Gate transistors enable chips to operate at lower voltage with lower leakage
source

That was a press release from a year ago.... It is not a technical document and it was before the mass production. We all already know that Intel has difficulties and delays.

Yes, FinFETs will reduce leakage. However, the fact of just having FinFETs does not guarantee lower leakage. I am willing to bet the current process is currently leakier than Intel targeted. New processes always are leaky at first and get less so as it gets more mature.


Quote:
Originally Posted by BizzareRide View Post

Their silicon is still immature, as in their probably B# or C# stepping. Any change in the letter means theres a major silicon revision that took place. I remember they matured the 32nm Clarkdale to the O# stepping
Exactly. Intel has 15 major revisions of 32nm!?

What's IVB launching at? E?

Sorry, it was K# stepping, not "O" so there were 11 revisions!
Quote:
Core i 5-670 (3.46 GHz): SLBLT (C2) - > SLBTL (K0)
Core i 5-661 (3.33 GHz): SLBNE (C2) - > SLBTB (K0)
Core i 5-660 (3.33 GHz): SLBLV (C2) - > SLBTK (K0)
Core i 5-650 (3.2 GHz): SLBLK (C2) - > SLBTJ (K0)
Core i 3-540 (3.06 GHz): SLBMQ (C2) - > SLBTD (K0)
Core i 3-530 (2.93 GHz): SLBLR (C2) - > SLBX7 (K0)
Pentium G6950 (2.8 GHz): SLBMS (C2) - > SLBTG (K0)

Source

Still very mature. If they were still producing Clarkdales, I'd imagine they would have lapped their mature process. I would love a "BB0" stepping

I think IVB is C stepping, but I'm not 100% sure.
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post #66 of 183
4/30/12 at 1:06pm
Just to clarify one item mentioned previously (someone may have already done so but I missed it if that's the case): IVB does have a 77W TDP. Intel says they are marked as 95W so that manufacturers would design their motherboards for backwards compatibility with higher TDP chips (sandy bridge) rather than having them potentially killed by running SNB as a result of under-engineering.
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post #67 of 183
4/30/12 at 1:20pm
I wouldnt buy Ivy right now.

You will gain 1 - 3% performance increase when both processor are overclocked

Only way i would get ivy is if i had a 1 gallon capacity liquid cooling setup.

Than we are talking.


Otherwise even for high end traditional cooling, its just not worth spending 400 bucks on a 1-3 % performance boost

Better spent on gfx cards
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post #68 of 183
4/30/12 at 1:26pm
Quote:
Originally Posted by finalturismo View Post

I wouldnt buy Ivy right now.
You will gain 1 - 3% performance increase when both processor are overclocked
Only way i would get ivy is if i had a 1 gallon capacity liquid cooling setup.
Than we are talking.
Otherwise even for high end traditional cooling, its just not worth spending 400 bucks on a 1-3 % performance boost
Better spent on gfx cards

Another inaccurate post. Check this post. I don't feel like explaining again.
http://www.overclock.net/t/1250554/mt-intel-admits-that-ivy-bridge-runs-hotter-because-of-22nm-shrink/20#post_17114915
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post #69 of 183
4/30/12 at 1:27pm
Quote:
Originally Posted by finalturismo View Post

I wouldnt buy Ivy right now.
You will gain 1 - 3% performance increase when both processor are overclocked
Only way i would get ivy is if i had a 1 gallon capacity liquid cooling setup.
Than we are talking.
Otherwise even for high end traditional cooling, its just not worth spending 400 bucks on a 1-3 % performance boost
Better spent on gfx cards

it´s 3-7% in avg....

only haswell worth it if they get much better results biggrin.gif
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post #70 of 183
4/30/12 at 2:15pm
Wait...what?

I can believe a die shrink would increase temps, but doesn't the lovely TIM harm the temps also? Or was the TIM not as significant as it was made out to be?

Edit: Nope. Guess it didn't have anything to do with the TIM.
https://www.decryptedtech.com/index.php?option=com_k2&view=item&id=685:ivy-bridge-heat-issues-not-caused-by-thermal-interface-material&Itemid=138
Edited by Blast - 4/30/12 at 2:24pm
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