They pit this card against a 7900GTX, X1900XT, and XFX's excellent passive 7950GT card.
"Power consumption for the ASUS card is the lowest among the four tested. This is an unexpected result, as both use the same chipset but the XFX7950 GT is passively cooled while the EN7950 GT is cooled by a fan.The EN7950 GT uses 60 Watts less power under load than the X1900XT 256. This is a very important fact for anyone planning on using two video cards. A CrossFire setup with the X1900XT 256 would require a much more powerful power supply than an SLI'd EN7950 GT or the XFX 7950 GT setup."