Water Cooling Is Recommended For 4.0 GHz, Continued
Throttling back causes processor performance to fall off. At 4 GHz, power consumption also increases by a few watts, so that when compared to its original power consumption level of about 80 W, it must now deal with 195 W at maximum load.
|Pentium D 805||Zalman Cooler|
|Clock Rate||100% Utilization||Idle Mode|
|4.10 GHz||crash||52 °C|
|4.00 GHz||80 °C||49 °C|
|3.80 GHz||76 °C||47 °C|
|3.60 GHz||74 °C||46 °C|
|3.32 GHz||71 °C||46 °C|
|2.66 GHz||64 °C||44 °C|
It was clear that air cooling solutions were no longer sufficient to let the system function at 4 GHz in all situations, so we switched to a water-cooled solution for this CPU. It worked!
Water cooling let the system transfer heat away from the CPU and keep working at top speed.
At a 200 MHz FSB clock rate, we can use the complete memory bandwidth for DDR2-667. Likewise, DDR2-800 now appears as a usable selection in the BIOS.
With memory speeds of up to DDR2-800, we can exploit 4 GHz CPU performance to its fullest potential.
We ran through our benchmarks with both DDR2-667 and DDR2-800 memory configurations.
At a setting of 1.5625 V for core voltage, the CPU we purchased at a retail outlet ran trouble-free.