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|Memory Speed||Timings||Voltage||System Idle Power||Max. System Power|
|DDR2-533||3-3-3-9||1.8 V||148 W||189 W|
|DDR2-533||5-5-5-15||1.8 V||148 W||189 W|
|DDR2-667||3-3-3-9||1.8 V||149 W||191 W|
|DDR2-667||5-5-5-15||1.8 V||149 W||192 W|
|DDR2-800||3-4-3-9||2.0 V||152 W||196 W|
|DDR2-800||5-5-5-15||1.8 V||151 W||193 W|
|DDR2-1066||5-5-5-15||2.1 V||158 W||205 W|
Using DDR2-1066 RAM increases the system power draw (and memory cost) considerably, without delivering a huge performance increase.
|Graphics Card||System Idle Power||Max. System Power|
|Nvidia GeForce 8800GTS||143 W||248 W|
|Nvidia GeForce 7800GT||103 W||184 W|
|Nvidia GeForce 6800GT||117 W||189 W|
GeForce 7 can be considered the most efficient GeForce graphics card, as both its successor and its predecessor required more power. The latest GeForce 8 series is a power hog, which we cannot recommend for efficiency-aware users unless you want maximum performance or DirectX 10 support now.
|Hard Drive||Specs||Setup||System Idle Power|
|Western Digital WD1500ADFD (150 GB)||3.5" - 10,000 RPM||4 platters||145 W|
|Seagate Barracuda ES (750 GB)||3.5" - 7,200 RPM||4 platters||143 W|
|Samsung HD321KJ (320 GB)||3.5" - 7,200 RPM||2 platters||141 W|
|Samsung HM160JI (160 GB)||2.5" - 5,400 RPM||2 platters||134 W|
The difference between a 10,000 RPM WD Raptor and other 7,200 RPM drives is only noteworthy when compared to hard drives with few platters (1-2). In other cases, the energy requirements will only differ by a few watts.
|Add-On cards||System Idle Power|
|no add-on cards||143 W|
|Intel Pro/1000 MT Network Card||145 W|
|Adaptec 1430SA SATA RAID Controller||148 W|
Adding expansion cards increases the power requirements, but the two test cards (a network card and a storage controller) didn't boost consumption by much.