Digital Storm Core i7-965

Power

We measure power consumption using a Kill-A-Watt device at the wall outlet. Idle indicates a measurement taken in Windows at the desktop with no applications running. Max indicates the maximum power draw with the system fully loaded (running eight instances of Prime95 and 3DMark Vantage simultaneously). We've also indicated power draw with just the CPU loaded.

With a monitor on the same outlet (another 80W), this was the first time we've hit the thousands place on our Kill-a-Watt with a computer system. Of course, the 941W number shown is the peak power draw we tested, but we saw numbers between 700 and 780W in Far Cry 2 under normal gameplay conditions. That can definitely add up to a lot of money in power bills, so we recommend turning off systems like this when they're not in use. The idle power alone will account for around $300 per year if run 24/7!

Noise

We measured noise with a sound level meter, at distances of 24" and 48". For reference, ambient noise was approximately 37.5 dB(A).

We thought that this was the noisiest system we've tested, and once we made our measurements we confirmed that was the case. The steady drone from the GTX 285s really makes for an unpleasant experience. The system was clearly audible from an adjacent room with the door closed, and we found ourselves leaving the room if we got a phone call. This is a real shame on a system with CPU water-cooling that contributes very little to overall noise levels. Water-cooled GPUs would definitely improve the noise results, although costs will escalate dramatically. GPU cooling for three CPUs will add $720, or a dual-loop water-cooling setup will add $1080.

Temperature

We utilized CoreTemp 0.99.4 to measure CPU temperatures. We loaded each core with Prime95 and ran 3DMark Vantage in the background.

The Core i7 processor runs quite hot, especially when overclocked, and the Swiftech water-cooler is doing a very good job at 4.0GHz.