Recently I moved my computer components from a large full tower case to a smaller one that fits my new desk. In the process I decided to buy a new power efficient PSU to try to save a little bit on lost heat and electricity. My previous PSU was the Thermaltale TR2-430 (65+ efficiency) (specs) and I changed it for an Antec EA-430D Green (80 PLUS Bronze, so 82+ efficiency) (specs).
The old case also had 1 PATA cdrw and one PATA dvdrw and 5 80mm fans. In the new setup I replaced the drives with a single SATA dvdrw and the new case is running only 2 80mm fans at slower speeds. In summary, the new setup has one optical drive and 3 fans less than the old configuration.
I have a power meter (same as a Kill-a-watt) and these changes had the effect of increasing my idle power consumption from 89-91 watts to 99-101 watts, basically a 10 watts increase.
My question is what can explain that? And does anyone already had the same results with Antec EarthWatt PSU?