Power Consumption and Overclocking

Readings were taken using a P3 – Kill A Watt digital meter at the power receptacle. The system was placed under full load by looping Crysis demos, running prime95 on each CPU core and performing a system virus scan.

ASUS Rampage Formula Intel X48 Motherboard Review - Motherboards 137 

The Power Consumption on the ASUS Rampage Formula was higher than the ASRock X48 solution. This is without any of the energy saving settings enabled on the ASUS. The difference is easily explainable, when you take into consideration the ASRock is somewhat of a stripped down board with no bells or whistles. Between the more expansive list of onboard components, onboard LED’s and Supreme FX sound card the power differential is easily explained.


When it comes to overclocking no two people, or two samples for that matter, are alike. Overclocking is like a fine wine, everyone’s taste is going to be different. Overclocking results vary greatly between equipment and users. Some tweakers prefer to run insane voltages to reach extremely high FSB. Some overclockers prefer to run a reasonable voltage to facilitate a safer 24/7 overclock. I fit into the latter category, and always approach my overclock sections with the before mentioned strategy. All settings are tested under an 8 hour torture test with prime 95 running to max out the CPU, and 3Dmark lopping to max out the power draw on the system. However, OC mileage will vary from sample to sample and system to system. Here is my final result:

ASUS Rampage Formula Intel X48 Motherboard Review - Motherboards 138

By lowering the CPU ratio to 6X and some slight voltage adjustments, I was able to push to the FSB ceiling up to 490 FSB, from the stock setting of 333 FSB. The second numbers merely reflect the Quad pumped ratings of the FSB. The CPU was not a limiting factor, because with the 6X multiplier in effect, the CPU was actually just slightly above its stock core clock at this FSB. The Quad core CPU’s tend to stress the power regulation circuitry more than a comparable dual core, so FSB ceilings tend to be lower with Quad cores in use. This chipset had more room to be pushed farther, but I didn’t feel pushing voltages higher would yield an OC with system longevity in mind. Once again Results will vary greatly between samples and users themselves. 

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