Wednesday, April 25th 2012
Ivy Bridge Temperatures Could Be Linked To TIM Inside Integrated Heatspreader: Report
PC enthusiasts with Ivy Bridge engineering samples, and reviewers at large have come to the consensus that Ivy Bridge is a slightly warmer chip than it should be. An investigation by Overclockers.com revealed a possible contributing factor to that. Upon carefully removing the integrated heatspreader (IHS) of an Ivy Bridge Core processor (that nickel-plated copper plate on top of the processor which makes contact with the cooler), the investigator found common thermal paste between the CPU die and the IHS, and along the sides of the die.
In comparison, Intel used flux-less solder to bind the IHS to the die on previous-generation Sandy Bridge Core processors in the LGA1155 package. Attempting to remove IHS off a chip with flux-less solder won't end well, as it could rip the die off the package. On the other hand, the idea behind use of flux-less solder in CPU packages is to improve heat transfer between the die and the IHS. Using thermal paste to do the job results in slightly inferior heat transfer, but removing IHS is safer. One can be sure that making it safe for IHS removal couldn't have been the issue behind switching back to conventional thermal paste, as everything under the IHS isn't user-serviceable anyway, and off limits for them. Perhaps Intel kept extreme overclockers in mind.
Source:
Overclockers.com
In comparison, Intel used flux-less solder to bind the IHS to the die on previous-generation Sandy Bridge Core processors in the LGA1155 package. Attempting to remove IHS off a chip with flux-less solder won't end well, as it could rip the die off the package. On the other hand, the idea behind use of flux-less solder in CPU packages is to improve heat transfer between the die and the IHS. Using thermal paste to do the job results in slightly inferior heat transfer, but removing IHS is safer. One can be sure that making it safe for IHS removal couldn't have been the issue behind switching back to conventional thermal paste, as everything under the IHS isn't user-serviceable anyway, and off limits for them. Perhaps Intel kept extreme overclockers in mind.
97 Comments on Ivy Bridge Temperatures Could Be Linked To TIM Inside Integrated Heatspreader: Report
IB seems to be more optimised for power efficiency at stock settings and great IGP performance, rather than being tuned for the enthusiast overclocker. It's not really surprising, when you see that computing is going mobile more and more and us enthusiasts make up a miniscule percentage of Ivy Bridge's buyers. It's a real shame, but that's life.
Anyhow, as you say Ivy Bridge seems to be targeted at a different segment of the market, I'm one of these people. Usually I find them rare in these kind of forums.
Also, as a non-overclocker you potentially have an advantage: you'd think that the K chips are the same as the non-K chips appart from the locked multiplier, wouldn't you. Incredibly, they're not: Intel actually disable the odd feature here and there in the K chips. For SB, their virtualization technology was more limited. I have no idea why they'd do this, because you need more processing power for a virtual environment, which would justify overclocking.
I'd be interested to see if anyone can explain Intel's logic on this one, as it doesn't make any sense to me.
Well now He's on water and for a week or so he will run it at:
Intel Core i7-3770K, 4433 MHz (43 x 103) < Using Gigabyte Easy Tune
Field Value
Sensor Properties
Sensor Type ITE IT8728F (ISA A30h)
GPU Sensor Type Diode, CHiL CHL8266 (NV-Diode, 46h)
Chassis Intrusion Detected No
Temperatures (MUCH BETTER)
Motherboard 40 °C (104 °F)
CPU 9 °C (48 °F)
CPU Package 29 °C (84 °F)
CPU IA Cores 29 °C (84 °F)
CPU GT Cores 25 °C (77 °F)
CPU #1 / Core #1 20 °C (68 °F)
CPU #1 / Core #2 29 °C (84 °F)
CPU #1 / Core #3 22 °C (72 °F)
CPU #1 / Core #4 24 °C (75 °F)
Aux 40 °C (104°F)
I mentioned this in my thread that i have noticed my friends GPU runs hotter on this gigabyte motherboard and not sure why maybe its just the sensor.
So if you buy a Ivy Bridge PLEASE spend a little extra and get a good heatsink and fan IMO
I think the fan was at 1750RPM and when i disabled the fan control in the bios i think it only went up to 2170RPM not nuch help :(
60C first but even the slight load set that off. need more proof I'll be glad to make a video :roll:
It's not "his fault". :rolleyes: Ivy Bridge has been engineered to use significantly less power than Sandy Bridge: it fits into a 77W power envelope instead of 95W. Therefore, it should run cooler at stock not hotter, simple as that.
Having the CPU idle at 50C and then hit 75C+ on running a standard 3D Mark benchmark points to a fault somewhere. Perhaps the mobo is feeding it too much voltage? Could be a lot of things, but the fact remains that the CPU is running too hot and he's correct to flag it.
I am with Shibdib on this one, I call BS. There's no way it would have hit 75C+ without either a poor\incorrect configuration and\or an incorrectly configured BIOS. There's also just the off chance he got a bad CPU, it happens often enough. I just don't find it very likely a freshly installed CPU--even without aftermarket coolers--would hit almost 80c without some kind of problem on the user end.
Here's the pertinent bit of my post:
1. ...with the mount of his cooler.
2. ... its a VERY leaky chip which would make me want it. :p Actually... its not. You may not have thought of..........
1. The die is smaller than SB and doesnt have the same amount of space to dissapate the heat.
2. Have you seen die pics as in the guts/litho? Regardless, the iGPU is much larger on IB than SB so smaller die and smaller area to pack the cpu cores in compounds the heat issue.
If you put all that together with basic thermodynamic theory, it should lead you to believe that even though does use ~18W less, its also trying to dissapate heat through a MUCH smaller area therefore making it run hotter.
IVY:
SB:
Looks like the iGPU here is 33% of the die, vs the 2600k which looks to be 25% of the die.
Sad that I have IB and its in my review/benching rig and not using it elsewhere. :(