Whenever a new processor line gets released by
Intel or
AMD,
the enthusiasts are usually the first to pick them up. As well as
enjoying the increased stock performance, many also decide to overclock
their chip to see how much extra performance can be squeezed out.
However, anyone who has overclocked a
Sandy Bridge processor successfully may be in for a shock when they pick up an
Ivy Bridge
part. It has been discovered through testing that Ivy Bridge runs
significantly hotter when overclocked. By significantly, I mean as much
as 20 degrees Celsius more at the same clock speed.
The Tech Report did a real-world test where they pitted a Sandy
Bridge Core i7-2600K against an Ivy Bridge Core i7-3770K. Both chips
were pushed to 4.9GHz using air cooling and the results logged.
The power use was slightly higher for the 3770K (236w vs. 231w),
voltages were almost the same, but again Ivy Bridge was a little higher
(1.368V vs. 1.381V). Heat is where the two chips really differed,
though. At 4.9GHz the Sandy Bridge chip held a steady 80 degrees
Celsius, but Ivy Bridge was at 100 degrees Celsius. That may still be
within operational limits, but suggests anyone wanting to run an
overclocked Ivy Bridge is going to have to invest in some better
cooling.
As for why there is such a big difference in temperatures, the
culprit is most likely going to be the change Intel has made to the
thermal interface. Sandy Bridge chips use a fluxless solder for the link
between the CPU and the heat spreader. Ivy Bridge has switched to
thermal paste, which is less efficient at dissipating heat.
Intel has confirmed the additional temperature is down to “different
package thermal technology” and a “higher thermal density” for the Ivy
Bridge chips. Neither of which are going to change, so if you intend to
overclock one of these new chips, be sure to invest in rock solid
cooling.
More at The Tech Report