Here are the two cards: ASUS EAH5670/DI/1GD5 Radeon HD 5670 (Redwood) 1GB ... XFX HD-567X-ZNF3 Radeon HD 5670 1GB 128-bit DDR5 P... I am only a very casual gammer. Need single slot. Need low power. The ASUS seems to have a much larger fan. But NOT all fans are created equal (lol). Which would be quieter? Which would run cooler? Could not find any URLs with direct comparison of these two cards. Thanks in advance for any responses.