Closing the Loop II: New Liquid Coolers from Corsair and Swiftech

Testing Methodology

If you've been keeping up with our case reviews, our testing methodology for the fans here is going to seem relatively similar in some ways. Our test system may seem a bit unusual in more than a few ways, but stick with me and I'll explain why I put it together and tested it the way I did.

The processor, with its healthy voltage boost and overclock, throws a pretty substantial amount of heat at our cooling system. Testing with an i7-2700K at stock speeds would defeat the purpose; Intel's own stock cooler can handle that, we want to "separate the men from the boys" so to speak.

I needed a case that could produce adequate airflow, handle all of the different cooling systems without much trouble, and did not include any sound dampening features. You might be surprised at just how difficult that was to find, but BitFenix came to the rescue and sent over a Shinobi XL. BitFenix's enclosure didn't get the best review when I tested it, but it's actually ideal for this testbed. I removed every case fan but the front intake, which I ran at 5V to prevent it from affecting acoustics while still providing adequate airflow.

Since a dedicated GPU wasn't needed, one wasn't used. This prevents a graphics card from generating additional heat or noise or deflecting airflow.

Thermal and acoustic test cycles were done the same way as our case reviews. First, the system is left powered and idle for fifteen minutes. At this point the sound level is tested, room ambient temperature is recorded, and idle temperatures are recorded. Then eight threads of small FFTs in Prime95 are run for fifteen minutes, and load temperatures are recorded.

Each cooler was tested using its available presets; the PWM-controlled coolers were tested at 30% and 100% using motherboard control.

Thank You!

Before moving on, we'd like to thank the following vendors for providing us with the hardware used in our roundup.

• Thank you to iBuyPower for providing us with the Intel Core i7-2700K.
• Thank you to Zotac for providing us with the Z77-ITX WiFi motherboard.
• Thank you to Kingston for providing us with the SSDNow V+ 100 SSD.
• Thank you to Corsair for providing us with the CX430 power supply.
• Thank you to BitFenix for providing us with the Shinobi XL Window enclosure.