AMD Phenom II X2 550 BE & Athlon II X2 250

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AM2+ vs. AM3

Performance on the AM3 platform is only one part of the equation. As many users have AM2+ motherboards, it is prudent to see how power consumption and performance differed on AM2+. For AM2+ testing, we used an Asus M3A78-T motherboard and 2x2GB of G.Skill DDR2 memory running at 800 MHz with 5-5-5-16 timings.

Test Results: AM2+ vs. AM3
Test State
Athlon II X2 250
Phenom II X2 550
AM2+
AM3
AM2+
AM3
Idle
61W
60W
68W
65W
VC-1
Playback
84W
90W
85W
CPU Load
125W
122W
129W

General power consumption was similar on both platforms for both of AMD's new processors. Both CPUs used a few watts less on the AM3 platform, but it was too little to cause any concern.

Benchmark Comparison
Test
Athlon II X2 250
Phenom II X2 550
AM2+
AM3
AM2+
AM3
NOD32
3:09
3:35
2:34
WinRAR
3:57
4:03
3:20
3:09
iTunes
5:23
5:36
4:48
4:44
TMPGEnc
5:21
5:11
5:03
4:54
PCMark2005
6722
6545
7556
7217
Benchmark Power Consumption
Test
Athlon II X2 250
Phenom II X2 550
AM2+
AM3
AM2+
AM3
NOD32
102W
88W
103W
106W
WinRAR
100W
93W
104W
105W
iTunes
100W
98W
106W
108W
TMPGEnc
112W
115W
117W
118W

The Athlon II performed slightly better on the AM2+ platform, but used more power in all the tests it won. The Phenom II X2 favored the AM3 test configuration in the same way. This is rather appropriate seeing as the X2 250 is the cheaper processor and more likely to be paired with an AM2+ motherboard.



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