The Results:

With all that said, let’s take a look at the results. We will start off with the average load/idle temperatures.

Average Idle/ Load Temperatures for the 2.8 GHz setup

The SilenX EFZ-120HA5 has a decent first result to show. Only the SilenX Effizio is flirting with the 40′s here while the GT stays a single degree below. The SanAce fan can push down the temperature another 2 degrees.

Average Idle/ Load Temperatures for the 3.6 GHz setup

At the medium OC the temperatures remain in the early 40′s at idle but this all changes under load. We have seen some decent results at the stock setting with temperatures going into the mid too upper 50′s; however, at 3.6 GHz the load temperatures already easily break the 80′s. In fact only the SanAce fan is able to hold it just below 80 degrees with a temperature of 78 degrees.

Average Idle/ Load Temperatures for the 4.0 GHz setup

There is no taming our bench test with the SilenX EFZ-120HA5. We well break into and exceed the 90 degree range.

Average Test Temp @ 2.8 GHz

Here, we are comparing the average test temperatures in a timeline with the average ambient temperature which acts as a reference point.
The SilenX EFZ-120HA5 is already above the desired 10 degree gap above ambient and starts the test off with about 14-15 degrees above ambient. There is a 15-20 degree temperature rise going from idle to load.

Average Test Temp @ 3.6 GHz

At idle the temperature already rises above 40 and is now rather clear above 15 degrees above ambient temperature. At load we can clearly see a rather dramatic rise in temperature. Compared to the observed 20+ degrees in temperature difference we now observe the gap opening up to near 40 degrees. A 100% increase in temperature increase.

Average Test Temp @ 4.0 GHz

The SilenX EFZ-120HA5 is maxed out at our 4.0 GHz test and only the SanAce can work out a small advantage at idle.

Delta T / Temp over Ambient @ 2.8 GHz

The Delta T charts show a timeline of the measured temperature differences (Delta’s) only, with the measured ambient temperature as a reference point.
Here we can see that the SilenX EFZ-120HA5 remains just below 15 degrees and tacks on another 15 at load.

Delta T / Temp over Ambient @ 3.6 GHz

The near 40 degree temperature difference becomes even more apparent in this image.

Delta T / Temp over Ambient @ 4.0 GHz

We confirmed that the SilenX EFZ-120HA5 reached it’s limit at 3.6 GHz, going to 4.0 GHz just pushes it over the edge.

CPU Throttle Summary

Our throttle tests were all negative and signs of heavy CPU throttling are all over the place.

The SilenX fan performs decently but the amount of heat generated is just too much for the heatsink. We can see the SanAce inch out a very small advantage but even the increased airflow of the SanAce can not pull out more cooling performance out of the heatsink. The shallow depth and a missing 4th heatpipe we can see with many other cooler in this group have the SilenX EFZ-120HA5 fall short of a promising result.

Next: HSF Comparison Chart

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