AMD's 785G Chipset Boards: 780G Evolved

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TEST RESULTS

Asus M4A785TD-V EVO

Test Results: Asus M4A785TD-V EVO
Test State
X3 720 BE @
2.8 GHz (C&Q)
X3 720 BE @
1.6 GHz (1.025V)
Mean
CPU
System Power
Mean
CPU
System Power
Idle
N/A
56W
N/A
59W
Rush Hour
(H.264)
10%
~62W
5%
~64W
Coral Reef
(WMV-HD)
30%
~73W
37%
~65W
Drag Race
(VC-1)
40%
~89W
44%
~67W
Disturbia
(Blu-ray H.264)
15%
~71W
9%
~69W
CPU Load
N/A
123W
N/A
74W
CPU + GPU
Load
N/A
133W
N/A
84W

The M4A785TD-V, powered by a X3 720 processor was tested at stock speeds and underclocked to 1.6 GHz with the lowest stable voltage possible (in our case, 1.025V — the BIOS limit). Running at 2.8 GHz, the onboard IGP breezed through our video playback suite with CPU usage topping out at 40% during our high bitrate VC-1 clip. Underclocked, VC-1 playback used a few more CPU cycles but the clips were still rendered with relative ease. H.264 playback when underclocked resulted in lower CPU usage because we disabled Cool'n'Quiet — at stock settings Cool'n'Quiet set the clock speed lower than 1.6 GHz.

MSI 785GM-E65

Test Results: MSI 785GM-E65
Test State
X3 720 BE @
2.8 GHz (C&Q)
X3 720 BE @
1.6 GHz (0.940V)
Mean
CPU
System Power
Mean
CPU
System Power
Idle
N/A
44W
N/A
45W
Rush Hour
(H.264)
9%
~52W
4%
~52W
Coral Reef
(WMV-HD)
28%
~68W
35%
~55W
Drag Race
(VC-1)
40%
~78W
44%
~56W
Disturbia
(Blu-ray H.264)
16%
~57W
9%
~57W
CPU Load
N/A
121W
N/A
62W
CPU + GPU
Load
N/A
130W
N/A
72W

With the same hardware underneath the hood, the 785GM-E65 delivered nearly identical results during video playback. The MSI board however exhibited much lower power consumption, especially when idle. It also used less power when underclocked/undervolted, though MSI's BIOS allowed us to undervolt further, 0.940V compared to 1.025V on the Asus board.



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