Originally Posted by r0ach
The takeaway from this thread is:
Infernobridge vs Sandy bridge under load = IB is 44% hotter at 1.3v, 36% hotter at 1.2v, and 16% hotter at 1.1v
Terminal, exponential thermal curve reached at 1.2v !
Seeing as how Lynnfield to IB migration had load temps go down and the chips still used the same amount of power as lynnfield, I can't wait to see an Infernobridge killawatt readings at load for anything over 1.1v since heat increase causes power use to go up.
I honestly don't think it's the wattage that is the problem here. IB is a die shrink and because of this the W / mm^2 is much higher then SB, i think this is the cause of the problem, the area is just not big enough to dissapate the heat so the Delta T between the IHS and the heat sink is very high.
I'll do a wattage reading on the rig tomorrow and see how that goes and also do a 1.4v test to see if it keeps scaling up or if it levels out.
Originally Posted by HydrogenHuman
Yeah I just saw that he was using really cold liquid cooling. So that means air cooling users may be in trouble with Ivy when overclocking.
I'm pushing 1.3v here, it may not seem that much, but i think i have a bad chip and users like punceh have been able to reach in ~4.8ghz with ~1.225v so if that is the average chip or just a decent one it's not to bad. He is using a high end air cooler. With a good custom loop, i would think it would be possible to keep the cpu under 70C load with 1.3v with HT on
I honestly don't think IB is to bad, i mean when the large number of chips start rolling out i would guess that 50% of them will do ~4.4Ghz on 1.2v. At that voltage with HT ON a decent air cooler will be good enough. On an average water loop most chips will see 4.7Ghz and a good water loop will be able to push most chips towards 5Ghz (that is close to a 5.2Ghz SB). Find a good chip and a good water loop and i would not be surprised if we see 5.2Ghz 24/7 runs and that is the equivalent of a 5.4Ghz SB.
In addition to that we have PCI-EX 3.0 support, and some other goodies.
But this are all just speculations and estimates based on what i have seen, to be 100% sure we just have to wait another week.Edited by Eggy88 - 4/17/12 at 7:31pm