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TEST RESULTS
Our test system is fairly basic, featuring a X2 4850e, a mid-level dual core
processor with a low 45W TDP cooled by a stock AMD heatpipe cooler connected
to a variable DC fan controller so the fan's power draw does not come into play.
The rest of the system consists of a single stick of Corsair memory, an Asus
Blu-ray drive, a 5400RPM notebook hard drive and an OEM Seasonic 400W power
supply. The operating system used is Vista Home Premium SP1 (32-bit).
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Test Results: X2 4850e @ 2.5GHz (C&Q), 128MB
UMA
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Test State
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Gigabyte 790GP-DS4H
|
MSI DKA790GX Platinum
|
|
Mean
CPU
|
System Power
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Mean
CPU
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System Power
|
|
Off
|
N/A
|
2W
|
N/A
|
2W
|
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Sleep (S3)
|
N/A
|
3W
|
N/A
|
2W
|
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Idle
|
N/A
|
37W
|
N/A
|
39W
|
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Rush Hour
(H.264)
|
10%
|
57W
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10%
|
62W
|
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Coral Reef
(WMV-HD)
|
47%
|
57W
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45%
|
64W
|
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Drag Race
(VC-1)
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67%
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70W
|
72%
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76W
|
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Disturbia
(Blu-ray H.264)
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32%
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68W
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33%
|
70W
|
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CPU Load
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N/A
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93W
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N/A
|
95W
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CPU + GPU Load
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N/A
|
107W
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N/A
|
109W
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With 128MB of system memory allocated to the IGP, CPU usage during video playback
was similar, varying by only a few percentage points at most. The DKA790GX used
more power during playback regardless of the minor differences in CPU usage.
The 790GP-DS4H also used less power when idle and during full load.
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Test Results: X2 4850e @ 2.5GHz (C&Q), 128MB
Sideport
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Test State
|
Gigabyte 790GP-DS4H
|
MSI DKA790GX Platinum
|
|
Mean
CPU
|
System Power
|
Mean
CPU
|
System Power
|
|
Idle
|
N/A
|
38W
|
N/A
|
36W
|
|
Rush Hour
(H.264)
|
15%
|
46W
|
10%
|
58W
|
|
Coral Reef
(WMV-HD)
|
33%
|
55W
|
38%
|
55W
|
|
Drag Race
(VC-1)
|
57%
|
64W
|
62%
|
69W
|
|
Disturbia
(Blu-ray H.264)
|
34%
|
61W
|
33%
|
71W
|
|
CPU Load
|
N/A
|
96W
|
N/A
|
94W
|
|
CPU + GPU Load
|
N/A
|
104W
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N/A
|
107W
|
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DKA790GX Platinum configured with 32MB UMA (minimum) and
64MB during Blu-ray playback. 790GP-DS4H had no system memory allocated
to the IGP.
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When Sideport memory was enabled, The DKA790GX required 32MB of system memory
to be allocated to the IGP as it was unable to run on Sideport memory alone.
However, PowerDVD and other playback software would not play our Blu-ray disc
in this configuration. After some investigation we discovered that the UMA frame
buffer had to be increased to 64MB. Incidentally, 128MB UMA alone, without Sideport,
was enough for Blu-ray playback with the screen resolution set to 1920 x 1200,
while only 64MB UMA was required at 1680 x 1050.
Running with Sideport memory alone, the 790GP-DS4H used less power during playback
of most of our video clips and at full load with both the CPU and GPU stressed.
Idle and with CPU load only, the DKA790GX had the advantage, possibly due to
inefficiency in the implementation of the DKA790GX's Sideport memory, or the
extra resources required for the small amount of system memory used by the IGP.
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